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fa-chevron-up&quot;},&quot;theme&quot;:&quot;default&quot;,&quot;sticky&quot;:{&quot;toggle&quot;:false,&quot;device&quot;:[&quot;Desktop&quot;],&quot;width&quot;:{&quot;desktop&quot;:&quot;617px&quot;,&quot;tablet&quot;:&quot;90%&quot;,&quot;mobile&quot;:&quot;100%&quot;},&quot;horizonAlign&quot;:&quot;left&quot;,&quot;verticalAlign&quot;:&quot;top&quot;,&quot;right&quot;:{&quot;desktop&quot;:&quot;0px&quot;,&quot;tablet&quot;:&quot;0px&quot;,&quot;mobile&quot;:&quot;0px&quot;},&quot;left&quot;:{&quot;desktop&quot;:&quot;0px&quot;,&quot;tablet&quot;:&quot;0px&quot;,&quot;mobile&quot;:&quot;0px&quot;},&quot;top&quot;:{&quot;desktop&quot;:&quot;0px&quot;,&quot;tablet&quot;:&quot;0px&quot;,&quot;mobile&quot;:&quot;0px&quot;},&quot;bottom&quot;:{&quot;desktop&quot;:&quot;0px&quot;,&quot;tablet&quot;:&quot;0px&quot;,&quot;mobile&quot;:&quot;0px&quot;},&quot;zIndex&quot;:{&quot;desktop&quot;:100,&quot;tablet&quot;:100,&quot;mobile&quot;:100}},&quot;slideTitle&quot;:{&quot;titleColor&quot;:&quot;#2e2e2e&quot;,&quot;slideBarColor&quot;:&quot;#abababbf&quot;,&quot;spaceDevice&quot;:&quot;desktop&quot;,&quot;space&quot;:{&quot;desktop&quot;:&quot;15px&quot;,&quot;tablet&quot;:&quot;15px&quot;,&quot;mobile&quot;:&quot;15px&quot;},&quot;spaceBottomDevice&quot;:&quot;desktop&quot;,&quot;spaceBottom&quot;:{&quot;desktop&quot;:&quot;15px&quot;,&quot;tablet&quot;:&quot;15px&quot;,&quot;mobile&quot;:&quot;15px&quot;},&quot;spaceBottomUnit&quot;:{&quot;desktop&quot;:&quot;px&quot;,&quot;tablet&quot;:&quot;px&quot;,&quot;mobile&quot;:&quot;px&quot;}},&quot;slideList&quot;:{&quot;spaceDevice&quot;:&quot;desktop&quot;,&quot;space&quot;:{&quot;desktop&quot;:&quot;15px&quot;,&quot;tablet&quot;:&quot;15px&quot;,&quot;mobile&quot;:&quot;15px&quot;},&quot;fontSize&quot;:{&quot;desktop&quot;:&quot;16px&quot;,&quot;tablet&quot;:&quot;16px&quot;,&quot;mobile&quot;:&quot;16px&quot;},&quot;fontUnit&quot;:{&quot;desktop&quot;:&quot;px&quot;,&quot;tablet&quot;:&quot;px&quot;,&quot;mobile&quot;:&quot;px&quot;}},&quot;advanced&quot;:{&quot;dimension&quot;:{&quot;padding&quot;:{&quot;desktop&quot;:{&quot;top&quot;:&quot;0px&quot;,&quot;right&quot;:&quot;0px&quot;,&quot;bottom&quot;:&quot;0px&quot;,&quot;left&quot;:&quot;0px&quot;},&quot;tablet&quot;:{&quot;top&quot;:&quot;0px&quot;,&quot;right&quot;:&quot;0px&quot;,&quot;bottom&quot;:&quot;0px&quot;,&quot;left&quot;:&quot;0px&quot;},&quot;mobile&quot;:{&quot;top&quot;:&quot;0px&quot;,&quot;right&quot;:&quot;0px&quot;,&quot;bottom&quot;:&quot;0px&quot;,&quot;left&quot;:&quot;0px&quot;}}},&quot;borderShadow&quot;:{&quot;normal&quot;:{&quot;radius&quot;:{&quot;top&quot;:&quot;0px&quot;,&quot;right&quot;:&quot;0px&quot;,&quot;bottom&quot;:&quot;0px&quot;,&quot;left&quot;:&quot;0px&quot;},&quot;shadow&quot;:[{&quot;hOffset&quot;:&quot;0px&quot;,&quot;vOffset&quot;:&quot;0px&quot;,&quot;blur&quot;:&quot;0px&quot;,&quot;spreed&quot;:&quot;0px&quot;,&quot;color&quot;:&quot;#7090b0&quot;,&quot;isInset&quot;:false}]}},&quot;background&quot;:{&quot;normal&quot;:{&quot;type&quot;:&quot;color&quot;,&quot;color&quot;:&quot;#fff&quot;,&quot;gradient&quot;:{&quot;type&quot;:&quot;radial&quot;,&quot;radialType&quot;:&quot;ellipse&quot;,&quot;colors&quot;:[{&quot;color&quot;:&quot;rgba(58, 66, 222, 1)&quot;,&quot;position&quot;:&quot;0&quot;},{&quot;color&quot;:&quot;rgba(176, 195, 235, 1)&quot;,&quot;position&quot;:&quot;80&quot;}],&quot;centerPositions&quot;:{&quot;x&quot;:50,&quot;y&quot;:50},&quot;angel&quot;:90},&quot;img&quot;:{&quot;url&quot;:&quot;&quot;,&quot;desktop&quot;:{&quot;position&quot;:&quot;center center&quot;,&quot;xPosition&quot;:0,&quot;yPosition&quot;:0,&quot;attachment&quot;:&quot;&quot;,&quot;repeat&quot;:&quot;no-repeat&quot;,&quot;size&quot;:&quot;&quot;,&quot;customSize&quot;:&quot;0px&quot;},&quot;tablet&quot;:{&quot;position&quot;:&quot;center center&quot;,&quot;xPosition&quot;:0,&quot;yPosition&quot;:0,&quot;attachment&quot;:&quot;&quot;,&quot;repeat&quot;:&quot;no-repeat&quot;,&quot;size&quot;:&quot;&quot;,&quot;customSize&quot;:&quot;0px&quot;},&quot;mobile&quot;:{&quot;position&quot;:&quot;center center&quot;,&quot;xPosition&quot;:0,&quot;yPosition&quot;:0,&quot;attachment&quot;:&quot;&quot;,&quot;repeat&quot;:&quot;no-repeat&quot;,&quot;size&quot;:&quot;&quot;,&quot;customSize&quot;:&quot;0px&quot;}},&quot;video&quot;:{&quot;url&quot;:&quot;&quot;,&quot;loop&quot;:false},&quot;transition&quot;:0.3}}}}'><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e16\u0e49\u0e32\u0e08\u0e30\u0e43\u0e2b\u0e49 \u201c\u0e43\u0e0a\u0e49\u0e44\u0e14\u0e49\u0e08\u0e23\u0e34\u0e07\u0e01\u0e31\u0e1a PLC\/\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e08\u0e31\u0e01\u0e23\u201d \u0e04\u0e27\u0e23\u0e40\u0e23\u0e35\u0e22\u0e19\u0e40\u0e1b\u0e47\u0e19\u0e25\u0e33\u0e14\u0e31\u0e1a \u0e44\u0e21\u0e48\u0e43\u0e0a\u0e48\u0e2d\u0e48\u0e32\u0e19\u0e19\u0e34\u0e22\u0e32\u0e21\u0e01\u0e23\u0e30\u0e42\u0e14\u0e14\u0e44\u0e1b\u0e21\u0e32<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e25\u0e33\u0e14\u0e31\u0e1a\u0e19\u0e35\u0e49:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Bit\/Byte \u0e41\u0e25\u0e30\u0e40\u0e25\u0e02\u0e10\u0e32\u0e19\u0e2a\u0e2d\u0e07<\/li>\n\n\n\n<li>Serial communication<\/li>\n\n\n\n<li>RS232 \/ RS485<\/li>\n\n\n\n<li>Serial setting (9600,8,N,1)<\/li>\n\n\n\n<li>ASCII protocol<\/li>\n\n\n\n<li>Modbus RTU<\/li>\n\n\n\n<li>Modbus TCP<\/li>\n\n\n\n<li>\u0e01\u0e32\u0e23 debug \u0e2b\u0e19\u0e49\u0e32\u0e07\u0e32\u0e19<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e23\u0e34\u0e48\u0e21\u0e1a\u0e17 1 \u0e01\u0e48\u0e2d\u0e19<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u0e1a\u0e17 1: Bit \/ Byte \/ Binary \u0e41\u0e1a\u0e1a\u0e0a\u0e48\u0e32\u0e07 PLC \u0e15\u0e49\u0e2d\u0e07\u0e40\u0e02\u0e49\u0e32\u0e43\u0e08<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e17\u0e38\u0e01\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e43\u0e19 digital communication \u0e2a\u0e38\u0e14\u0e17\u0e49\u0e32\u0e22\u0e04\u0e37\u0e2d 0 \u0e01\u0e31\u0e1a 1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e2d\u0e21\u0e1e\u0e34\u0e27\u0e40\u0e15\u0e2d\u0e23\u0e4c PLC inverter HMI \u0e21\u0e2d\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e40\u0e1b\u0e47\u0e19\u0e40\u0e25\u0e02\u0e10\u0e32\u0e19\u0e2a\u0e2d\u0e07<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0 \u0e2b\u0e23\u0e37\u0e2d 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e23\u0e35\u0e22\u0e01\u0e27\u0e48\u0e32 bit<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8 bit = 1 byte<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>10110010<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e19\u0e35\u0e48\u0e04\u0e37\u0e2d 1 byte<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-2\"><\/span>\u0e17\u0e33\u0e44\u0e21\u0e15\u0e49\u0e2d\u0e07\u0e21\u0e35 0 \u0e01\u0e31\u0e1a 1 ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30\u0e27\u0e07\u0e08\u0e23\u0e2d\u0e34\u0e40\u0e25\u0e47\u0e01\u0e17\u0e23\u0e2d\u0e19\u0e34\u0e01\u0e2a\u0e4c\u0e41\u0e22\u0e01\u0e44\u0e14\u0e49\u0e07\u0e48\u0e32\u0e22<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e44\u0e21\u0e48\u0e21\u0e35\u0e44\u0e1f = 0<br>\u0e21\u0e35\u0e44\u0e1f = 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0V = LOW<br>5V = HIGH<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e23\u0e37\u0e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0V = 0<br>24V = 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e14\u0e31\u0e07\u0e19\u0e31\u0e49\u0e19 \u201c\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u201d \u0e08\u0e23\u0e34\u0e07 \u0e46 \u0e04\u0e37\u0e2d\u0e44\u0e1f\u0e40\u0e1b\u0e34\u0e14\u2013\u0e1b\u0e34\u0e14\u0e40\u0e23\u0e47\u0e27\u0e21\u0e32\u0e01<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e40\u0e25\u0e02\u0e10\u0e32\u0e19\u0e2a\u0e2d\u0e07\u0e04\u0e37\u0e2d\u0e2d\u0e30\u0e44\u0e23<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1b\u0e01\u0e15\u0e34\u0e40\u0e23\u0e32\u0e43\u0e0a\u0e49\u0e40\u0e25\u0e02\u0e10\u0e32\u0e19\u0e2a\u0e34\u0e1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>583<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1b\u0e25\u0e27\u0e48\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>5\u00d7100 +\n8\u00d710 +\n3\u00d71 +\n= 583<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e10\u0e32\u0e19\u0e2a\u0e2d\u0e07\u0e01\u0e47\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e01\u0e31\u0e19 \u0e41\u0e15\u0e48\u0e43\u0e0a\u0e49\u0e01\u0e33\u0e25\u0e31\u0e07\u0e02\u0e2d\u0e07 2<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1011<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e01\u0e44\u0e14\u0e49\u0e40\u0e1b\u0e47\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1\u00d78 <math data-latex=\"(2^3)\"><semantics><mrow><mo form=\"prefix\" stretchy=\"false\">(<\/mo><msup><mn>2<\/mn><mn>3<\/mn><\/msup><mo form=\"postfix\" stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">(2^3)<\/annotation><\/semantics><\/math>\n0\u00d74 <math data-latex=\"(2^2)\"><semantics><mrow><mo form=\"prefix\" stretchy=\"false\">(<\/mo><msup><mn>2<\/mn><mn>2<\/mn><\/msup><mo form=\"postfix\" stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">(2^2)<\/annotation><\/semantics><\/math>\n1\u00d72 <math data-latex=\"(2^1)\"><semantics><mrow><mo form=\"prefix\" stretchy=\"false\">(<\/mo><msup><mn>2<\/mn><mn>1<\/mn><\/msup><mo form=\"postfix\" stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">(2^1)<\/annotation><\/semantics><\/math>\n1\u00d71 <math data-latex=\"(2^0)\"><semantics><mrow><mo form=\"prefix\" stretchy=\"false\">(<\/mo><msup><mn>2<\/mn><mn>0<\/mn><\/msup><mo form=\"postfix\" stretchy=\"false\">)<\/mo><\/mrow><annotation encoding=\"application\/x-tex\">(2^0)<\/annotation><\/semantics><\/math><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e23\u0e27\u0e21<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>11<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e14\u0e31\u0e07\u0e19\u0e31\u0e49\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1011(\u2082) = 11(\u2081\u2080)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e08\u0e33\u0e04\u0e48\u0e32\u0e1e\u0e27\u0e01\u0e19\u0e35\u0e49\u0e43\u0e2b\u0e49\u0e02\u0e36\u0e49\u0e19\u0e43\u0e08<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>1      = 0000000<strong>1<\/strong>\n2      = 000000<strong>1<\/strong>0\n4      = 00000<strong>1<\/strong>00\n8      = 0000<strong>1<\/strong>000\n16     = 000<strong>1<\/strong>0000\n32     = 00<strong>1<\/strong>00000\n64     = 0<strong>1<\/strong>000000\n128    = <strong>1<\/strong>0000000<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e19\u0e35\u0e48\u0e04\u0e37\u0e2d \u201c\u0e19\u0e49\u0e33\u0e2b\u0e19\u0e31\u0e01\u0e1a\u0e34\u0e15\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e16\u0e49\u0e32\u0e08\u0e33\u0e44\u0e14\u0e49 \u0e0a\u0e35\u0e27\u0e34\u0e15 debug PLC \u0e07\u0e48\u0e32\u0e22\u0e02\u0e36\u0e49\u0e19\u0e40\u0e22\u0e2d\u0e30<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-5\"><\/span>\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e08\u0e23\u0e34\u0e07\u0e43\u0e19 PLC<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e21\u0e21\u0e15\u0e34 input 8 \u0e15\u0e31\u0e27<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><sub>Start Bit<\/sub> \u2192 X0 X1 X2 X3 X4 X5 X6 X7<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e16\u0e32\u0e19\u0e30:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><sub>Start Bit<\/sub> \u2192 ON OFF ON ON OFF OFF OFF ON<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e01\u0e25\u0e32\u0e22\u0e40\u0e1b\u0e47\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>10001101 \u2190 <sub>Start Bit<\/sub><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e34\u0e14\u0e04\u0e48\u0e32:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>128 + 8 + 4 + 1<br>= 141<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e1a\u0e32\u0e07\u0e15\u0e31\u0e27\u0e2a\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 input \u0e40\u0e1b\u0e47\u0e19 decimal \u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e38\u0e13\u0e15\u0e49\u0e2d\u0e07\u0e41\u0e1b\u0e25\u0e01\u0e25\u0e31\u0e1a\u0e44\u0e14\u0e49<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-6\"><\/span>bit masking (\u0e2a\u0e33\u0e04\u0e31\u0e0d\u0e21\u0e32\u0e01)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e21\u0e21\u0e15\u0e34 inverter \u0e2a\u0e48\u0e07 status \u0e21\u0e32<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e48\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>13<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e23\u0e34\u0e07 \u0e46 \u0e2d\u0e32\u0e08\u0e2b\u0e21\u0e32\u0e22\u0e16\u0e36\u0e07<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>00001101<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1b\u0e25\u0e27\u0e48\u0e32<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">bit0 = 1<br>bit1 = 0<br>bit2 = 1<br>bit3 = 1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e35\u0e04\u0e27\u0e32\u0e21:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bit0 = RUN<br>bit1 = FAULT<br>bit2 = READY<br>bit3 = ALARM<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e14\u0e31\u0e07\u0e19\u0e31\u0e49\u0e19\u0e2a\u0e16\u0e32\u0e19\u0e30\u0e04\u0e37\u0e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>RUN = true<br>FAULT = false<br>READY = true<br>ALARM = true<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e19\u0e35\u0e48\u0e04\u0e37\u0e2d\u0e40\u0e2b\u0e15\u0e38\u0e1c\u0e25\u0e17\u0e35\u0e48\u0e15\u0e49\u0e2d\u0e07\u0e2d\u0e48\u0e32\u0e19 binary<\/p>\n\n\n\n<blockquote class=\"wp-block-quote has-ast-global-color-5-background-color has-background is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Bit Masking (\u0e01\u0e32\u0e23\u0e21\u0e32\u0e2a\u0e01\u0e4c\u0e1a\u0e34\u0e15)<\/strong> \u0e04\u0e37\u0e2d\u0e40\u0e17\u0e04\u0e19\u0e34\u0e04\u0e43\u0e19\u0e40\u0e0a\u0e34\u0e07\u0e42\u0e1b\u0e23\u0e41\u0e01\u0e23\u0e21\u0e21\u0e34\u0e48\u0e07\u0e41\u0e25\u0e30\u0e01\u0e32\u0e23\u0e2a\u0e37\u0e48\u0e2d\u0e2a\u0e32\u0e23\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e17\u0e35\u0e48\u0e43\u0e0a\u0e49\u0e43\u0e19\u0e01\u0e32\u0e23 <strong>&#8220;\u0e40\u0e25\u0e37\u0e2d\u0e01&#8221;<\/strong> \u0e2b\u0e23\u0e37\u0e2d <strong>&#8220;\u0e08\u0e31\u0e14\u0e01\u0e32\u0e23&#8221;<\/strong> \u0e40\u0e09\u0e1e\u0e32\u0e30\u0e1a\u0e32\u0e07\u0e1a\u0e34\u0e15 (Bit) \u0e20\u0e32\u0e22\u0e43\u0e19\u0e0a\u0e38\u0e14\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e44\u0e1a\u0e19\u0e32\u0e23\u0e35 \u0e42\u0e14\u0e22\u0e17\u0e35\u0e48\u0e1a\u0e34\u0e15\u0e2d\u0e37\u0e48\u0e19 \u0e46 \u0e17\u0e35\u0e48\u0e44\u0e21\u0e48\u0e15\u0e49\u0e2d\u0e07\u0e01\u0e32\u0e23\u0e08\u0e30\u0e16\u0e39\u0e01 &#8220;\u0e1b\u0e34\u0e14&#8221; \u0e2b\u0e23\u0e37\u0e2d &#8220;\u0e0b\u0e48\u0e2d\u0e19&#8221; \u0e44\u0e1b <br>\u0e40\u0e1b\u0e23\u0e35\u0e22\u0e1a\u0e40\u0e17\u0e35\u0e22\u0e1a\u0e07\u0e48\u0e32\u0e22 \u0e46 \u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e01\u0e32\u0e23\u0e40\u0e2d\u0e32 <strong>&#8220;\u0e41\u0e1c\u0e48\u0e19\u0e01\u0e23\u0e30\u0e14\u0e32\u0e29\u0e17\u0e35\u0e48\u0e21\u0e35\u0e0a\u0e48\u0e2d\u0e07\u0e40\u0e08\u0e32\u0e30\u0e23\u0e39&#8221; (Mask)<\/strong> \u0e44\u0e1b\u0e27\u0e32\u0e07\u0e17\u0e31\u0e1a\u0e1a\u0e19\u0e0a\u0e38\u0e14\u0e15\u0e31\u0e27\u0e40\u0e25\u0e02 \u0e40\u0e1e\u0e37\u0e48\u0e2d\u0e43\u0e2b\u0e49\u0e40\u0e23\u0e32\u0e21\u0e2d\u0e07\u0e40\u0e2b\u0e47\u0e19\u0e41\u0e04\u0e48\u0e40\u0e25\u0e02\u0e43\u0e19\u0e15\u0e33\u0e41\u0e2b\u0e19\u0e48\u0e07\u0e17\u0e35\u0e48\u0e40\u0e08\u0e32\u0e30\u0e23\u0e39\u0e44\u0e27\u0e49\u0e40\u0e17\u0e48\u0e32\u0e19\u0e31\u0e49\u0e19<br><br>\u0e17\u0e33\u0e44\u0e21\u0e15\u0e49\u0e2d\u0e07\u0e43\u0e0a\u0e49 Bit Masking?<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u0e1b\u0e23\u0e30\u0e2b\u0e22\u0e31\u0e14\u0e2b\u0e19\u0e48\u0e27\u0e22\u0e04\u0e27\u0e32\u0e21\u0e08\u0e33:<\/strong> \u0e43\u0e19\u0e23\u0e30\u0e1a\u0e1a PLC \u0e01\u0e32\u0e23\u0e40\u0e01\u0e47\u0e1a\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 8 \u0e2a\u0e16\u0e32\u0e19\u0e30 (\u0e40\u0e0a\u0e48\u0e19 Run, Stop, Fault, Alarm, Ready, Warning, Reset, Power) \u0e40\u0e23\u0e32\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e40\u0e01\u0e47\u0e1a\u0e23\u0e27\u0e21\u0e44\u0e27\u0e49\u0e43\u0e19 1 Byte \u0e44\u0e14\u0e49\u0e40\u0e25\u0e22 \u0e41\u0e17\u0e19\u0e17\u0e35\u0e48\u0e08\u0e30\u0e43\u0e0a\u0e49\u0e15\u0e31\u0e27\u0e41\u0e1b\u0e23 8 \u0e15\u0e31\u0e27<\/li>\n\n\n\n<li><strong>\u0e04\u0e27\u0e32\u0e21\u0e40\u0e23\u0e47\u0e27:<\/strong> \u0e01\u0e32\u0e23\u0e04\u0e33\u0e19\u0e27\u0e13 Bitwise \u0e43\u0e19\u0e23\u0e30\u0e14\u0e31\u0e1a CPU \u0e17\u0e33\u0e44\u0e14\u0e49\u0e40\u0e23\u0e47\u0e27\u0e21\u0e32\u0e01<\/li>\n\n\n\n<li><strong>\u0e21\u0e32\u0e15\u0e23\u0e10\u0e32\u0e19\u0e2a\u0e37\u0e48\u0e2d\u0e2a\u0e32\u0e23:<\/strong> \u0e42\u0e1b\u0e23\u0e42\u0e15\u0e04\u0e2d\u0e25\u0e2d\u0e38\u0e15\u0e2a\u0e32\u0e2b\u0e01\u0e23\u0e23\u0e21\u0e2a\u0e48\u0e27\u0e19\u0e43\u0e2b\u0e0d\u0e48 (\u0e40\u0e0a\u0e48\u0e19 Modbus) \u0e21\u0e31\u0e01\u0e08\u0e30\u0e2a\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e2a\u0e16\u0e32\u0e19\u0e30\u0e21\u0e32\u0e43\u0e19\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49 \u0e40\u0e23\u0e32\u0e08\u0e36\u0e07\u0e08\u0e33\u0e40\u0e1b\u0e47\u0e19\u0e15\u0e49\u0e2d\u0e07\u0e43\u0e0a\u0e49\u0e01\u0e32\u0e23\u0e21\u0e32\u0e2a\u0e01\u0e4c\u0e1a\u0e34\u0e15\u0e40\u0e1e\u0e37\u0e48\u0e2d &#8220;\u0e41\u0e01\u0e30&#8221; \u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e2d\u0e2d\u0e01\u0e21\u0e32\u0e43\u0e0a\u0e49\u0e07\u0e32\u0e19<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0e2a\u0e23\u0e38\u0e1b\u0e2a\u0e31\u0e49\u0e19 \u0e46:<\/strong> Bit masking \u0e04\u0e37\u0e2d\u0e27\u0e34\u0e18\u0e35\u0e01\u0e32\u0e23 <strong>&#8220;\u0e01\u0e23\u0e2d\u0e07&#8221;<\/strong> \u0e40\u0e2d\u0e32\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e1a\u0e34\u0e15\u0e17\u0e35\u0e48\u0e2a\u0e19\u0e43\u0e08\u0e2d\u0e2d\u0e01\u0e21\u0e32\u0e08\u0e32\u0e01\u0e01\u0e25\u0e38\u0e48\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 \u0e40\u0e1e\u0e37\u0e48\u0e2d\u0e43\u0e2b\u0e49\u0e23\u0e39\u0e49\u0e27\u0e48\u0e32\u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e2b\u0e23\u0e37\u0e2d\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e08\u0e31\u0e01\u0e23 \u0e13 \u0e02\u0e13\u0e30\u0e19\u0e31\u0e49\u0e19\u0e21\u0e35\u0e2a\u0e16\u0e32\u0e19\u0e30\u0e40\u0e1b\u0e47\u0e19\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e44\u0e23<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Hexadecimal (\u0e10\u0e32\u0e19 16)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e35\u0e01\u0e40\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e17\u0e35\u0e48\u0e15\u0e49\u0e2d\u0e07\u0e23\u0e39\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30 protocol \u0e0a\u0e2d\u0e1a\u0e43\u0e0a\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e25\u0e02\u0e10\u0e32\u0e19 16<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0 1 2 3 4 5 6 7 8 9 A B C D E F<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">A=10<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B=11<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F=15<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0x41<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1b\u0e25\u0e27\u0e48\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>65 decimal<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e25\u0e30\u0e04\u0e37\u0e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>01000001<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">ASCII \u0e15\u0e31\u0e27 A<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e19\u0e07\u0e32\u0e19 serial \u0e08\u0e30\u0e40\u0e08\u0e2d\u0e1a\u0e48\u0e2d\u0e22\u0e21\u0e32\u0e01<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"610\" src=\"https:\/\/www.299engineering.co.th\/wp-content\/uploads\/2026\/06\/image-13.png\" alt=\"\" class=\"wp-image-718\" srcset=\"http:\/\/www.299engineering.co.th\/wp-content\/uploads\/2026\/06\/image-13.png 1024w, http:\/\/www.299engineering.co.th\/wp-content\/uploads\/2026\/06\/image-13-300x179.png 300w, http:\/\/www.299engineering.co.th\/wp-content\/uploads\/2026\/06\/image-13-768x458.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.alpharithms.com\/ascii-table-512119\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.alpharithms.com\/ascii-table-512119\/<\/a><\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-8\"><\/span>\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e31\u0e21\u0e1e\u0e31\u0e19\u0e18\u0e4c<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>Decimal<br>65<br><br>Binary<br>01000001<br><br>Hex<br>41<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e37\u0e2d\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e40\u0e14\u0e35\u0e22\u0e27\u0e01\u0e31\u0e19\u0e04\u0e19\u0e25\u0e30\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-9\"><\/span>\u0e41\u0e1a\u0e1a\u0e1d\u0e36\u0e01\u0e2b\u0e31\u0e14 (\u0e25\u0e2d\u0e07\u0e15\u0e2d\u0e1a\u0e40\u0e2d\u0e07\u0e01\u0e48\u0e2d\u0e19)<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>00000101<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e17\u0e48\u0e32\u0e01\u0e31\u0e1a\u0e40\u0e25\u0e02\u0e2d\u0e30\u0e44\u0e23?<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>00001111<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e17\u0e48\u0e32\u0e01\u0e31\u0e1a\u0e40\u0e17\u0e48\u0e32\u0e44\u0e23?<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Decimal 10<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e02\u0e35\u0e22\u0e19\u0e40\u0e1b\u0e47\u0e19 binary \u0e44\u0e14\u0e49\u0e44\u0e2b\u0e21?<\/p>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Hex<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0x0A<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e37\u0e2d decimal \u0e2d\u0e30\u0e44\u0e23?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e2d\u0e1a 4 \u0e02\u0e49\u0e2d\u0e19\u0e35\u0e49\u0e01\u0e48\u0e2d\u0e19 \u0e41\u0e25\u0e49\u0e27\u0e08\u0e30\u0e15\u0e48\u0e2d\u0e1a\u0e17 2 \u0e40\u0e23\u0e37\u0e48\u0e2d\u0e07 Serial Communication \u0e17\u0e35\u0e48\u0e40\u0e23\u0e34\u0e48\u0e21\u0e40\u0e02\u0e49\u0e32\u0e42\u0e25\u0e01 RS232\/RS485 \u0e08\u0e23\u0e34\u0e07 \u0e46<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-10\"><\/span>\u0e1a\u0e17 2: Serial Communication \u2014 \u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e04\u0e38\u0e22\u0e01\u0e31\u0e19\u0e22\u0e31\u0e07\u0e44\u0e07<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e01\u0e48\u0e2d\u0e19\u0e2d\u0e37\u0e48\u0e19\u0e40\u0e02\u0e49\u0e32\u0e43\u0e08\u0e20\u0e32\u0e1e\u0e19\u0e35\u0e49\u0e01\u0e48\u0e2d\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e44\u0e21\u0e48\u0e44\u0e14\u0e49\u0e2a\u0e48\u0e07\u0e04\u0e33\u0e27\u0e48\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e2a\u0e1b\u0e35\u0e14 = 1450<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e48\u0e21\u0e31\u0e19\u0e2a\u0e48\u0e07\u0e40\u0e1b\u0e47\u0e19 \u201c\u0e0a\u0e38\u0e14\u0e1a\u0e34\u0e15\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0101010101100010<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e25\u0e49\u0e27\u0e2d\u0e35\u0e01\u0e1d\u0e31\u0e48\u0e07\u0e41\u0e1b\u0e25\u0e04\u0e27\u0e32\u0e21\u0e2b\u0e21\u0e32\u0e22<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Serial communication \u0e04\u0e37\u0e2d \u201c\u0e01\u0e32\u0e23\u0e2a\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e17\u0e35\u0e25\u0e30\u0e1a\u0e34\u0e15\u0e40\u0e23\u0e35\u0e22\u0e07\u0e01\u0e31\u0e19\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e17\u0e19\u0e17\u0e35\u0e48\u0e08\u0e30\u0e2a\u0e48\u0e07\u0e1e\u0e23\u0e49\u0e2d\u0e21\u0e01\u0e31\u0e19\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e2a\u0e49\u0e19<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-11\"><\/span>1. Parallel vs Serial<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Parallel<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e07\u0e2b\u0e25\u0e32\u0e22\u0e1a\u0e34\u0e15\u0e1e\u0e23\u0e49\u0e2d\u0e21\u0e01\u0e31\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19 8 \u0e1a\u0e34\u0e15<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1 0 1 0 1 1 0 0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e0a\u0e49\u0e2a\u0e32\u0e22 8 \u0e40\u0e2a\u0e49\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e20\u0e32\u0e1e\u0e41\u0e1a\u0e1a\u0e07\u0e48\u0e32\u0e22<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>bit0 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit1 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit2 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit3 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit4 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit5 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit6 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br>bit7 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e02\u0e49\u0e2d\u0e40\u0e2a\u0e35\u0e22:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e2a\u0e32\u0e22\u0e40\u0e22\u0e2d\u0e30<\/li>\n\n\n\n<li>\u0e44\u0e01\u0e25\u0e44\u0e21\u0e48\u0e14\u0e35<\/li>\n\n\n\n<li>timing \u0e40\u0e1e\u0e35\u0e49\u0e22\u0e19\u0e07\u0e48\u0e32\u0e22<\/li>\n\n\n\n<li>noise \u0e07\u0e48\u0e32\u0e22<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e36\u0e07\u0e44\u0e21\u0e48\u0e40\u0e2b\u0e21\u0e32\u0e30\u0e42\u0e23\u0e07\u0e07\u0e32\u0e19<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Serial (\u0e2a\u0e34\u0e48\u0e07\u0e17\u0e35\u0e48\u0e43\u0e0a\u0e49\u0e08\u0e23\u0e34\u0e07)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e07\u0e17\u0e35\u0e25\u0e30\u0e1a\u0e34\u0e15<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1 \u2192 0 \u2192 1 \u2192 0 \u2192 1 \u2192 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e0a\u0e49\u0e2a\u0e32\u0e22\u0e44\u0e21\u0e48\u0e01\u0e35\u0e48\u0e40\u0e2a\u0e49\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TX<br>RX<br>GND<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e23\u0e37\u0e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A<br>B<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a RS485<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e19\u0e35\u0e48\u0e04\u0e37\u0e2d\u0e40\u0e2b\u0e15\u0e38\u0e1c\u0e25\u0e17\u0e35\u0e48\u0e42\u0e23\u0e07\u0e07\u0e32\u0e19\u0e43\u0e0a\u0e49 serial \u0e41\u0e17\u0e1a\u0e2b\u0e21\u0e14<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"bppb-heading-anchor-14\"><\/span>2. Serial \u0e17\u0e33\u0e07\u0e32\u0e19\u0e22\u0e31\u0e07\u0e44\u0e07<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e21\u0e21\u0e15\u0e34\u0e08\u0e30\u0e2a\u0e48\u0e07\u0e15\u0e31\u0e27 A<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A = ASCII 65<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Binary:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>01000001<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e48\u0e2a\u0e48\u0e07\u0e08\u0e23\u0e34\u0e07\u0e44\u0e21\u0e48\u0e43\u0e0a\u0e48\u0e41\u0e04\u0e48 8 \u0e1a\u0e34\u0e15\u0e14\u0e37\u0e49\u0e2d \u0e46<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e31\u0e19\u0e21\u0e35\u0e01\u0e32\u0e23 \u201c\u0e41\u0e1e\u0e47\u0e01\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a\u0e17\u0e31\u0e48\u0e27\u0e44\u0e1b:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Start + Data + Stop<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0 <strong>01000001<\/strong> 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e18\u0e34\u0e1a\u0e32\u0e22:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>0 = Start bit<br>01000001 = Data<br>1 = Stop bit<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e35\u0e01\u0e1d\u0e31\u0e48\u0e07\u0e08\u0e36\u0e07\u0e23\u0e39\u0e49\u0e27\u0e48\u0e32<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u0e2d\u0e4b\u0e2d \u0e40\u0e23\u0e34\u0e48\u0e21\u0e2a\u0e48\u0e07\u0e41\u0e25\u0e49\u0e27<br>\u0e08\u0e1a\u0e41\u0e25\u0e49\u0e27<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Baud rate \u0e04\u0e37\u0e2d\u0e2d\u0e30\u0e44\u0e23<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e33\u0e04\u0e31\u0e0d\u0e21\u0e32\u0e01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Baud rate = \u0e04\u0e27\u0e32\u0e21\u0e40\u0e23\u0e47\u0e27\u0e2a\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600<br>19200<br>38400<br>115200<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e16\u0e49\u0e32 9600<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e21\u0e32\u0e22\u0e16\u0e36\u0e07\u0e1b\u0e23\u0e30\u0e21\u0e32\u0e13<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600 bit\/s<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e08\u0e23\u0e34\u0e07<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PLC:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>19200<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1c\u0e25?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e21\u0e31\u0e48\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e17\u0e19\u0e17\u0e35\u0e48\u0e08\u0e30\u0e44\u0e14\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>123.45<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e14\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u00a7\u25a1\u00d7A\u00a5<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e23\u0e37\u0e2d timeout<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30\u0e1f\u0e31\u0e07\u0e01\u0e31\u0e19\u0e04\u0e19\u0e25\u0e30\u0e08\u0e31\u0e07\u0e2b\u0e27\u0e30<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e04\u0e19\u0e2b\u0e19\u0e36\u0e48\u0e07\u0e1e\u0e39\u0e14\u0e40\u0e23\u0e47\u0e27 x2<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u0e2a\u0e34\u0e48\u0e07\u0e17\u0e35\u0e48\u0e15\u0e49\u0e2d\u0e07\u0e15\u0e23\u0e07\u0e01\u0e31\u0e19<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e27\u0e25\u0e32\u0e04\u0e38\u0e22 serial<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e49\u0e2d\u0e07\u0e15\u0e23\u0e07\u0e01\u0e31\u0e19 4 \u0e40\u0e23\u0e37\u0e48\u0e2d\u0e07<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">(1) Baud rate<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">(2) Data bits<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e31\u0e01\u0e40\u0e1b\u0e47\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>8<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e21\u0e32\u0e22\u0e16\u0e36\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 8 \u0e1a\u0e34\u0e15<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">(3) Parity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e0a\u0e49\u0e15\u0e23\u0e27\u0e08 error \u0e40\u0e25\u0e47\u0e01\u0e19\u0e49\u0e2d\u0e22<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e35<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>N = None<br>E = Even<br>O = Odd<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e27\u0e19\u0e43\u0e2b\u0e0d\u0e48:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>N<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">(4) Stop bit<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e31\u0e01\u0e40\u0e1b\u0e47\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e14\u0e31\u0e07\u0e19\u0e31\u0e49\u0e19\u0e08\u0e36\u0e07\u0e40\u0e2b\u0e47\u0e19\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600,8,N,1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e48\u0e32\u0e19\u0e27\u0e48\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600 baud<br>8 data bits<br>No parity<br>1 stop bit<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e16\u0e49\u0e32\u0e44\u0e21\u0e48\u0e15\u0e23\u0e07 = \u0e04\u0e38\u0e22\u0e44\u0e21\u0e48\u0e44\u0e14\u0e49<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. TX RX \u0e04\u0e37\u0e2d\u0e2d\u0e30\u0e44\u0e23<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TX = transmit<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">RX = receive<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e23\u0e31\u0e1a\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u2192 \u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e49\u0e2d\u0e07\u0e44\u0e02\u0e27\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC TX \u2192 Device RX<br><br>PLC RX \u2190 Device TX<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e25\u0e32\u0e22\u0e04\u0e19\u0e15\u0e48\u0e2d\u0e1c\u0e34\u0e14\u0e15\u0e23\u0e07\u0e19\u0e35\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e25\u0e49\u0e27\u0e07\u0e07\u0e27\u0e48\u0e32<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u0e17\u0e33\u0e44\u0e21\u0e44\u0e21\u0e48\u0e15\u0e34\u0e14<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. Half duplex \/ Full duplex<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Full duplex<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e38\u0e22\u0e1e\u0e23\u0e49\u0e2d\u0e21\u0e01\u0e31\u0e19\u0e44\u0e14\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e42\u0e17\u0e23\u0e28\u0e31\u0e1e\u0e17\u0e4c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1e\u0e39\u0e14\u0e1e\u0e23\u0e49\u0e2d\u0e21\u0e01\u0e31\u0e19\u0e44\u0e14\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19 RS232<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Half duplex<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1e\u0e39\u0e14\u0e17\u0e35\u0e25\u0e30\u0e04\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e27\u0e34\u0e17\u0e22\u0e38\u0e2a\u0e37\u0e48\u0e2d\u0e2a\u0e32\u0e23<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e1e\u0e39\u0e14\u0e08\u0e1a \u0e40\u0e1b\u0e25\u0e35\u0e48\u0e22\u0e19<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19 RS485<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Master \u0e16\u0e32\u0e21\u0e01\u0e48\u0e2d\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Slave \u0e04\u0e48\u0e2d\u0e22\u0e15\u0e2d\u0e1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">7. Timing \u0e2a\u0e33\u0e04\u0e31\u0e0d\u0e22\u0e31\u0e07\u0e44\u0e07<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Serial \u0e44\u0e21\u0e48\u0e21\u0e35\u0e04\u0e19\u0e21\u0e32\u0e04\u0e2d\u0e22\u0e1a\u0e2d\u0e01\u0e27\u0e48\u0e32<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u0e40\u0e23\u0e34\u0e48\u0e21\u0e15\u0e2d\u0e19\u0e19\u0e35\u0e49\u0e19\u0e30<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e35\u0e01\u0e1d\u0e31\u0e48\u0e07\u0e08\u0e36\u0e07\u0e2d\u0e32\u0e28\u0e31\u0e22 baud rate \u0e40\u0e1b\u0e47\u0e19\u0e19\u0e32\u0e2c\u0e34\u0e01\u0e32<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">9600 baud<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e17\u0e38\u0e01 bit \u0e15\u0e49\u0e2d\u0e07\u0e43\u0e0a\u0e49\u0e40\u0e27\u0e25\u0e32\u0e1b\u0e23\u0e30\u0e21\u0e32\u0e13\u0e40\u0e17\u0e48\u0e32\u0e01\u0e31\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e16\u0e49\u0e32 clock \u0e40\u0e1e\u0e35\u0e49\u0e22\u0e19\u0e21\u0e32\u0e01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e41\u0e15\u0e01<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">8. \u0e20\u0e32\u0e1e\u0e08\u0e23\u0e34\u0e07\u0e43\u0e19\u0e07\u0e32\u0e19 PLC<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e2d\u0e48\u0e32\u0e19\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e25\u0e33\u0e14\u0e31\u0e1a\u0e04\u0e37\u0e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC \u0e2a\u0e48\u0e07\u0e04\u0e33\u0e2a\u0e31\u0e48\u0e07<br><br>\"R\"<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1b\u0e25\u0e27\u0e48\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Request weight<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07\u0e15\u0e2d\u0e1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"12.35kg\"<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e17\u0e38\u0e01\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e2a\u0e48\u0e07\u0e17\u0e35\u0e25\u0e30 bit \u0e2b\u0e21\u0e14<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">9. \u0e17\u0e33\u0e44\u0e21 serial \u0e0a\u0e2d\u0e1a\u0e21\u0e35 timeout<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30 communication \u0e40\u0e1b\u0e47\u0e19\u0e25\u0e33\u0e14\u0e31\u0e1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e2a\u0e48\u0e07:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e2d\u0e48\u0e32\u0e19\u0e04\u0e48\u0e32<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e23\u0e2d 100 ms<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e21\u0e48\u0e21\u0e35\u0e15\u0e2d\u0e1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>timeout<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e32\u0e08\u0e40\u0e01\u0e34\u0e14\u0e08\u0e32\u0e01<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>baud rate \u0e1c\u0e34\u0e14<\/li>\n\n\n\n<li>TX RX \u0e1c\u0e34\u0e14<\/li>\n\n\n\n<li>address \u0e1c\u0e34\u0e14<\/li>\n\n\n\n<li>protocol \u0e1c\u0e34\u0e14<\/li>\n\n\n\n<li>\u0e2a\u0e32\u0e22\u0e02\u0e32\u0e14<\/li>\n\n\n\n<li>parity \u0e44\u0e21\u0e48\u0e15\u0e23\u0e07<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e2a\u0e34\u0e48\u0e07\u0e17\u0e35\u0e48\u0e0a\u0e48\u0e32\u0e07 PLC \u0e15\u0e49\u0e2d\u0e07\u0e08\u0e33<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e27\u0e25\u0e32\u0e04\u0e38\u0e22\u0e44\u0e21\u0e48\u0e44\u0e14\u0e49 \u0e2d\u0e22\u0e48\u0e32\u0e21\u0e31\u0e48\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e47\u0e04\u0e15\u0e32\u0e21\u0e19\u0e35\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1 \u0e2a\u0e32\u0e22\u0e16\u0e39\u0e01\u0e44\u0e2b\u0e21<br>2 TX\/RX \u0e16\u0e39\u0e01\u0e44\u0e2b\u0e21<br>3 baud rate \u0e15\u0e23\u0e07\u0e44\u0e2b\u0e21<br>4 parity \u0e15\u0e23\u0e07\u0e44\u0e2b\u0e21<br>5 stop bit \u0e15\u0e23\u0e07\u0e44\u0e2b\u0e21<br>6 protocol \u0e15\u0e23\u0e07\u0e44\u0e2b\u0e21<br>7 timeout \u0e40\u0e17\u0e48\u0e32\u0e44\u0e23<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e17\u0e15\u0e48\u0e2d\u0e44\u0e1b\u0e08\u0e30\u0e40\u0e23\u0e34\u0e48\u0e21\u0e40\u0e02\u0e49\u0e32 \u201c\u0e02\u0e2d\u0e07\u0e08\u0e23\u0e34\u0e07\u0e43\u0e19\u0e42\u0e23\u0e07\u0e07\u0e32\u0e19\u201d:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>RS232 vs RS485 \u0e41\u0e1a\u0e1a\u0e25\u0e36\u0e01 + \u0e27\u0e34\u0e18\u0e35\u0e15\u0e48\u0e2d\u0e2a\u0e32\u0e22 + termination resistor + noise + \u0e23\u0e30\u0e22\u0e30\u0e2a\u0e32\u0e22 + multi-drop + debug \u0e2b\u0e19\u0e49\u0e32\u0e07\u0e32\u0e19<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e23\u0e07\u0e19\u0e35\u0e49\u0e2a\u0e33\u0e04\u0e31\u0e0d\u0e21\u0e32\u0e01 \u0e40\u0e1e\u0e23\u0e32\u0e30\u0e04\u0e19\u0e17\u0e33 PLC \u0e1e\u0e25\u0e32\u0e14\u0e01\u0e31\u0e19\u0e1a\u0e48\u0e2d\u0e22\u0e2a\u0e38\u0e14 \u0e41\u0e25\u0e30\u0e40\u0e01\u0e35\u0e48\u0e22\u0e27\u0e01\u0e31\u0e1a\u0e07\u0e32\u0e19 Modbus \u0e42\u0e14\u0e22\u0e15\u0e23\u0e07<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\u0e1a\u0e17 3: RS232 vs RS485 \u2014 \u0e02\u0e2d\u0e07\u0e08\u0e23\u0e34\u0e07\u0e43\u0e19\u0e42\u0e23\u0e07\u0e07\u0e32\u0e19<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e19\u0e08\u0e33\u0e19\u0e27\u0e19\u0e21\u0e32\u0e01\u0e2a\u0e31\u0e1a\u0e2a\u0e19\u0e15\u0e23\u0e07\u0e19\u0e35\u0e49:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cModbus RTU \u0e43\u0e0a\u0e49 RS485 \u0e43\u0e0a\u0e48\u0e44\u0e2b\u0e21?\u201d<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e2d\u0e1a: <strong>\u0e44\u0e21\u0e48\u0e40\u0e2a\u0e21\u0e2d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e49\u0e2d\u0e07\u0e41\u0e22\u0e01\u0e01\u0e48\u0e2d\u0e19\u0e27\u0e48\u0e32<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RS232 \/ RS485 = \u0e27\u0e34\u0e18\u0e35\u0e2a\u0e48\u0e07\u0e2a\u0e31\u0e0d\u0e0d\u0e32\u0e13\u0e44\u0e1f\u0e1f\u0e49\u0e32 (physical layer)<\/li>\n\n\n\n<li>Modbus RTU = \u0e20\u0e32\u0e29\u0e32 (protocol)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e16\u0e19\u0e19 = RS485<br>\u0e20\u0e32\u0e29\u0e32 = Modbus<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e0a\u0e49\u0e16\u0e19\u0e19\u0e40\u0e14\u0e35\u0e22\u0e27\u0e01\u0e31\u0e19 \u0e41\u0e15\u0e48\u0e1e\u0e39\u0e14\u0e44\u0e14\u0e49\u0e2b\u0e25\u0e32\u0e22\u0e20\u0e32\u0e29\u0e32<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">1. RS232 \u0e04\u0e37\u0e2d\u0e2d\u0e30\u0e44\u0e23<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">RS232 \u0e40\u0e1b\u0e47\u0e19 serial communication \u0e41\u0e1a\u0e1a\u0e40\u0e01\u0e48\u0e32 \u0e41\u0e15\u0e48\u0e22\u0e31\u0e07\u0e43\u0e0a\u0e49\u0e40\u0e22\u0e2d\u0e30\u0e21\u0e32\u0e01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e0a\u0e49\u0e01\u0e31\u0e1a:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PLC \u2194 \u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07<\/li>\n\n\n\n<li>PLC \u2194 barcode scanner<\/li>\n\n\n\n<li>PLC \u2194 printer<\/li>\n\n\n\n<li>PLC \u2194 \u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e40\u0e01\u0e48\u0e32<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e38\u0e14\u0e40\u0e14\u0e48\u0e19:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e07\u0e48\u0e32\u0e22<\/li>\n\n\n\n<li>point-to-point<\/li>\n\n\n\n<li>\u0e15\u0e31\u0e49\u0e07\u0e04\u0e48\u0e32\u0e07\u0e48\u0e32\u0e22<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e02\u0e49\u0e2d\u0e40\u0e2a\u0e35\u0e22:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e23\u0e30\u0e22\u0e30\u0e2a\u0e31\u0e49\u0e19<\/li>\n\n\n\n<li>noise \u0e44\u0e21\u0e48\u0e17\u0e19<\/li>\n\n\n\n<li>\u0e15\u0e48\u0e2d\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e44\u0e21\u0e48\u0e44\u0e14\u0e49<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e42\u0e04\u0e23\u0e07\u0e2a\u0e23\u0e49\u0e32\u0e07<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e38\u0e22\u0e01\u0e31\u0e19 1 \u0e15\u0e48\u0e2d 1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC \u2190\u2192 Device<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e2a\u0e32\u0e22\u0e2b\u0e25\u0e31\u0e01<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e17\u0e31\u0e48\u0e27\u0e44\u0e1b\u0e43\u0e0a\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TX<br>RX<br>GND<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e27\u0e32\u0e21\u0e2b\u0e21\u0e32\u0e22:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TX = \u0e2a\u0e48\u0e07<br>RX = \u0e23\u0e31\u0e1a<br>GND = reference<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u0e15\u0e48\u0e2d\u0e22\u0e31\u0e07\u0e44\u0e07<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e49\u0e2d\u0e07\u0e44\u0e02\u0e27\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC TX \u2192 Device RX<br>PLC RX \u2190 Device TX<br>GND \u2194 GND<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e33\u0e07\u0e48\u0e32\u0e22:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e07\u0e44\u0e1b\u0e40\u0e02\u0e49\u0e32\u0e23\u0e31\u0e1a<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e1b\u0e31\u0e0d\u0e2b\u0e32\u0e04\u0e25\u0e32\u0e2a\u0e2a\u0e34\u0e01<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e48\u0e2d\u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TX \u2192 TX<br>RX \u2192 RX<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e25\u0e49\u0e27\u0e44\u0e21\u0e48\u0e15\u0e34\u0e14<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30\u0e15\u0e48\u0e32\u0e07\u0e04\u0e19\u0e15\u0e48\u0e32\u0e07\u0e1e\u0e39\u0e14 \u0e44\u0e21\u0e48\u0e21\u0e35\u0e04\u0e19\u0e1f\u0e31\u0e07<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">RS232 \u0e40\u0e2b\u0e21\u0e32\u0e30\u0e01\u0e31\u0e1a\u0e2d\u0e30\u0e44\u0e23<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e2d\u0e48\u0e32\u0e19\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07\u0e02\u0e49\u0e32\u0e07\u0e15\u0e39\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e32\u0e22 2\u20135 \u0e40\u0e21\u0e15\u0e23<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e42\u0e2d\u0e40\u0e04\u0e21\u0e32\u0e01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e48\u0e16\u0e49\u0e32 50 \u0e40\u0e21\u0e15\u0e23\u0e43\u0e19\u0e42\u0e23\u0e07\u0e07\u0e32\u0e19?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e23\u0e34\u0e48\u0e21\u0e40\u0e2a\u0e35\u0e48\u0e22\u0e07<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">2. RS485 \u0e04\u0e37\u0e2d\u0e2d\u0e30\u0e44\u0e23<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">RS485 \u0e04\u0e37\u0e2d\u0e1e\u0e23\u0e30\u0e40\u0e2d\u0e01\u0e42\u0e23\u0e07\u0e07\u0e32\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e44\u0e01\u0e25<\/li>\n\n\n\n<li>noise \u0e17\u0e19<\/li>\n\n\n\n<li>\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e15\u0e48\u0e2d\u0e44\u0e14\u0e49<\/li>\n\n\n\n<li>\u0e40\u0e2a\u0e16\u0e35\u0e22\u0e23<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e36\u0e07\u0e43\u0e0a\u0e49\u0e01\u0e31\u0e1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>inverter<\/li>\n\n\n\n<li>meter<\/li>\n\n\n\n<li>PLC remote IO<\/li>\n\n\n\n<li>sensor network<\/li>\n\n\n\n<li>Modbus RTU<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e15\u0e48\u0e32\u0e07\u0e08\u0e32\u0e01 RS232 \u0e22\u0e31\u0e07\u0e44\u0e07<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">RS232 \u0e43\u0e0a\u0e49\u0e41\u0e23\u0e07\u0e14\u0e31\u0e19\u0e40\u0e17\u0e35\u0e22\u0e1a GND<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">RS485 \u0e43\u0e0a\u0e49 \u201c\u0e04\u0e27\u0e32\u0e21\u0e15\u0e48\u0e32\u0e07\u0e41\u0e23\u0e07\u0e14\u0e31\u0e19\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e23\u0e35\u0e22\u0e01\u0e27\u0e48\u0e32 differential signaling<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e35\u0e2a\u0e32\u0e22<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A<br>B<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e21\u0e48\u0e43\u0e0a\u0e48 TX\/RX<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u0e41\u0e19\u0e27\u0e04\u0e34\u0e14 differential<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">RS485 \u0e44\u0e21\u0e48\u0e2a\u0e19\u0e04\u0e48\u0e32 absolute voltage<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e31\u0e19\u0e14\u0e39\u0e2a\u0e48\u0e27\u0e19\u0e15\u0e48\u0e32\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e01\u0e23\u0e13\u0e35 1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A = 5V<br>B = 1V<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e27\u0e19\u0e15\u0e48\u0e32\u0e07:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+4V<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">= logic \u0e2b\u0e19\u0e36\u0e48\u0e07\u0e04\u0e48\u0e32<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e01\u0e23\u0e13\u0e35 2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">noise \u0e21\u0e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A = 7V<br>B = 3V<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e48\u0e27\u0e19\u0e15\u0e48\u0e32\u0e07\u0e22\u0e31\u0e07<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+4V<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e48\u0e32\u0e19\u0e44\u0e14\u0e49\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e40\u0e14\u0e34\u0e21<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e19\u0e35\u0e48\u0e04\u0e37\u0e2d\u0e40\u0e2b\u0e15\u0e38\u0e1c\u0e25\u0e27\u0e48\u0e32<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">RS485 \u0e17\u0e19 noise<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e32\u0e01\u0e01\u0e27\u0e48\u0e32 RS232 \u0e21\u0e32\u0e01<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">topology (\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a\u0e01\u0e32\u0e23\u0e08\u0e31\u0e14\u0e27\u0e32\u0e07\u0e42\u0e04\u0e23\u0e07\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e2b\u0e23\u0e37\u0e2d\u0e01\u0e32\u0e23\u0e40\u0e0a\u0e37\u0e48\u0e2d\u0e21\u0e15\u0e48\u0e2d)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">RS232<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC \u2190\u2192 Device<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">RS485<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1a\u0e1a bus<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC \u2500\u2500\u2500 Drive1 \u2500\u2500\u2500 Drive2 \u2500\u2500\u2500 Meter<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e48\u0e2d\u0e1e\u0e48\u0e27\u0e07\u0e44\u0e14\u0e49\u0e2b\u0e25\u0e32\u0e22\u0e15\u0e31\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e23\u0e35\u0e22\u0e01 <strong>multi-drop<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Address \u0e2a\u0e33\u0e04\u0e31\u0e0d\u0e21\u0e32\u0e01<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e2d\u0e22\u0e39\u0e48\u0e40\u0e2a\u0e49\u0e19\u0e40\u0e14\u0e35\u0e22\u0e27\u0e01\u0e31\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e49\u0e2d\u0e07\u0e21\u0e35\u0e40\u0e25\u0e02\u0e1a\u0e49\u0e32\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Drive1 = 1<br>Drive2 = 2<br>Meter = 3<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e16\u0e32\u0e21<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>device 2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e2d\u0e37\u0e48\u0e19\u0e40\u0e07\u0e35\u0e22\u0e1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">3. A\/B \u0e01\u0e25\u0e31\u0e1a\u0e02\u0e31\u0e49\u0e27<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1b\u0e31\u0e0d\u0e2b\u0e32\u0e22\u0e2d\u0e14\u0e2e\u0e34\u0e15\u0e2d\u0e31\u0e19\u0e14\u0e31\u0e1a\u0e2b\u0e19\u0e36\u0e48\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e32\u0e07\u0e22\u0e35\u0e48\u0e2b\u0e49\u0e2d\u0e40\u0e02\u0e35\u0e22\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A+<br>B-<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e32\u0e07\u0e22\u0e35\u0e48\u0e2b\u0e49\u0e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>D+<br>D-<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e32\u0e07\u0e22\u0e35\u0e48\u0e2b\u0e49\u0e2d\u0e01\u0e25\u0e31\u0e1a\u0e01\u0e31\u0e19\u0e2d\u0e35\u0e01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e2d\u0e01\u0e2a\u0e32\u0e23\u0e44\u0e21\u0e48\u0e15\u0e23\u0e07\u0e14\u0e49\u0e27\u0e22<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e14\u0e31\u0e07\u0e19\u0e31\u0e49\u0e19<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u0e16\u0e49\u0e32\u0e44\u0e21\u0e48\u0e15\u0e34\u0e14 \u0e25\u0e2d\u0e07\u0e2a\u0e25\u0e31\u0e1a A\/B \u0e01\u0e48\u0e2d\u0e19<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e48\u0e17\u0e33\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e21\u0e35\u0e40\u0e2b\u0e15\u0e38\u0e1c\u0e25 \u0e44\u0e21\u0e48\u0e43\u0e0a\u0e48\u0e2a\u0e38\u0e48\u0e21\u0e17\u0e38\u0e01\u0e2d\u0e22\u0e48\u0e32\u0e07<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">4. Termination resistor \u0e04\u0e37\u0e2d\u0e2d\u0e30\u0e44\u0e23<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e27\u0e25\u0e32\u0e40\u0e14\u0e34\u0e19\u0e2a\u0e32\u0e22\u0e22\u0e32\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1b\u0e25\u0e32\u0e22\u0e2a\u0e32\u0e22\u0e21\u0e35 reflection<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e2b\u0e21\u0e37\u0e2d\u0e19\u0e40\u0e2a\u0e35\u0e22\u0e07\u0e2a\u0e30\u0e17\u0e49\u0e2d\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e17\u0e33\u0e43\u0e2b\u0e49 data \u0e40\u0e1e\u0e35\u0e49\u0e22\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e36\u0e07\u0e43\u0e2a\u0e48 resistor<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e31\u0e01\u0e40\u0e1b\u0e47\u0e19<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>120\u03a9<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e17\u0e35\u0e48 \u201c\u0e1b\u0e25\u0e32\u0e22 bus\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>120\u03a9<br>|<br>PLC \u2500\u2500\u2500 D1 \u2500\u2500\u2500 D2 \u2500\u2500\u2500 D3<br>                       |<br>                     120\u03a9<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2a\u0e33\u0e04\u0e31\u0e0d:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u0e43\u0e2a\u0e48\u0e40\u0e09\u0e1e\u0e32\u0e30\u0e2b\u0e31\u0e27\u2013\u0e17\u0e49\u0e32\u0e22 bus<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e21\u0e48\u0e43\u0e0a\u0e48\u0e17\u0e38\u0e01\u0e15\u0e31\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e21\u0e37\u0e2d\u0e43\u0e2b\u0e21\u0e48\u0e0a\u0e2d\u0e1a\u0e40\u0e1b\u0e34\u0e14\u0e17\u0e38\u0e01\u0e15\u0e31\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e25\u0e49\u0e27\u0e07\u0e07\u0e27\u0e48\u0e32\u0e17\u0e33\u0e44\u0e21 communication \u0e41\u0e1b\u0e25\u0e01<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">5. Bias resistor<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">(\u0e2b\u0e23\u0e37\u0e2d\u0e1a\u0e32\u0e07\u0e04\u0e23\u0e31\u0e49\u0e07\u0e40\u0e23\u0e35\u0e22\u0e01\u0e27\u0e48\u0e32 <strong>Pull-up\/Pull-down Resistor<\/strong>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e43\u0e0a\u0e49\u0e14\u0e36\u0e07 line \u0e43\u0e2b\u0e49\u0e21\u0e35\u0e2a\u0e16\u0e32\u0e19\u0e30\u0e19\u0e34\u0e48\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e2d\u0e19\u0e44\u0e21\u0e48\u0e21\u0e35\u0e04\u0e19\u0e2a\u0e48\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e25\u0e14 noise<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e32\u0e07 PLC \u0e21\u0e35 built-in<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e32\u0e07 converter \u0e21\u0e35 DIP switch<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">6. Star topology = \u0e15\u0e31\u0e27\u0e1b\u0e31\u0e0d\u0e2b\u0e32<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2b\u0e49\u0e32\u0e21\u0e15\u0e48\u0e2d\u0e41\u0e1a\u0e1a\u0e14\u0e32\u0e27 \u0e16\u0e49\u0e32\u0e40\u0e25\u0e35\u0e48\u0e22\u0e07\u0e44\u0e14\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e21\u0e48\u0e14\u0e35<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1a\u0e1a\u0e1c\u0e34\u0e14:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>        Drive1<br>          |<br>PLC ------+------ Drive2<br>          |<br>        Meter<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e1e\u0e23\u0e32\u0e30 reflection \u0e40\u0e22\u0e2d\u0e30<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e27\u0e23 daisy chain<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>PLC \u2500\u2500\u2500 Drive1 \u2500\u2500\u2500 Drive2 \u2500\u2500\u2500 Meter<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">7. \u0e23\u0e30\u0e22\u0e30\u0e2a\u0e32\u0e22<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e23\u0e48\u0e32\u0e27 \u0e46<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">RS232<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e43\u0e01\u0e25\u0e49<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">RS485<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u0e2b\u0e25\u0e32\u0e22\u0e23\u0e49\u0e2d\u0e22\u0e40\u0e21\u0e15\u0e23<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e48\u0e22\u0e34\u0e48\u0e07\u0e40\u0e23\u0e47\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e23\u0e30\u0e22\u0e30\u0e22\u0e34\u0e48\u0e07\u0e2a\u0e31\u0e49\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e48\u0e19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">115200 baud<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e2d\u0e32\u0e08\u0e44\u0e21\u0e48\u0e04\u0e27\u0e23\u0e25\u0e32\u0e01\u0e22\u0e32\u0e27\u0e21\u0e32\u0e01<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">8. Debug \u0e2b\u0e19\u0e49\u0e32\u0e07\u0e32\u0e19\u0e08\u0e23\u0e34\u0e07<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e04\u0e38\u0e22\u0e44\u0e21\u0e48\u0e44\u0e14\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e25\u0e48\u0e41\u0e1a\u0e1a\u0e19\u0e35\u0e49<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1 Power device \u0e15\u0e34\u0e14\u0e44\u0e2b\u0e21<br>2 A\/B \u0e16\u0e39\u0e01\u0e44\u0e2b\u0e21<br>3 baud rate \u0e15\u0e23\u0e07\u0e44\u0e2b\u0e21<br>4 address \u0e16\u0e39\u0e01\u0e44\u0e2b\u0e21<br>5 parity \u0e15\u0e23\u0e07\u0e44\u0e2b\u0e21<br>6 protocol \u0e16\u0e39\u0e01\u0e44\u0e2b\u0e21<br>7 \u0e40\u0e1b\u0e34\u0e14 termination \u0e40\u0e01\u0e34\u0e19\u0e44\u0e2b\u0e21<br>8 star wiring \u0e2b\u0e23\u0e37\u0e2d\u0e40\u0e1b\u0e25\u0e48\u0e32<br>9 timeout \u0e2a\u0e31\u0e49\u0e19\u0e44\u0e1b\u0e44\u0e2b\u0e21<br>10 \u0e21\u0e35 noise \u0e08\u0e32\u0e01 VFD \u0e44\u0e2b\u0e21<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e08\u0e23\u0e34\u0e07<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PLC \u0e2d\u0e48\u0e32\u0e19 inverter \u0e44\u0e21\u0e48\u0e44\u0e14\u0e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e40\u0e0a\u0e47\u0e04:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9600,N,8,1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e15\u0e48 inverter:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>19200,E,8,1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e08\u0e1a\u0e40\u0e25\u0e22<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e44\u0e21\u0e48\u0e21\u0e35\u0e17\u0e32\u0e07\u0e15\u0e34\u0e14<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e15\u0e2d\u0e19\u0e19\u0e35\u0e49\u0e04\u0e38\u0e13\u0e40\u0e23\u0e34\u0e48\u0e21\u0e40\u0e02\u0e49\u0e32\u0e43\u0e08 \u201c\u0e2a\u0e32\u0e22\u201d \u0e41\u0e25\u0e49\u0e27<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e1a\u0e17\u0e15\u0e48\u0e2d\u0e44\u0e1b\u0e08\u0e30\u0e40\u0e1b\u0e47\u0e19 <strong>ASCII protocol<\/strong> \u0e0b\u0e36\u0e48\u0e07\u0e2a\u0e33\u0e04\u0e31\u0e0d\u0e21\u0e32\u0e01\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e0a\u0e31\u0e48\u0e07, barcode, serial device \u0e40\u0e09\u0e1e\u0e32\u0e30\u0e17\u0e32\u0e07 \u0e41\u0e25\u0e30\u0e40\u0e1b\u0e47\u0e19\u0e2a\u0e30\u0e1e\u0e32\u0e19\u0e01\u0e48\u0e2d\u0e19\u0e40\u0e02\u0e49\u0e32 Modbus RTU \u0e40\u0e1e\u0e23\u0e32\u0e30\u0e04\u0e38\u0e13\u0e40\u0e04\u0e22\u0e16\u0e32\u0e21\u0e40\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e41\u0e1b\u0e25\u0e07 Modbus TCP \u2192 ASCII \u0e21\u0e32\u0e01\u0e48\u0e2d\u0e19\u0e14\u0e49\u0e27\u0e22<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0e16\u0e49\u0e32\u0e08\u0e30\u0e43\u0e2b\u0e49 \u201c\u0e43\u0e0a\u0e49\u0e44\u0e14\u0e49\u0e08\u0e23\u0e34\u0e07\u0e01\u0e31\u0e1a PLC\/\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e08\u0e31\u0e01\u0e23\u201d \u0e04\u0e27\u0e23\u0e40\u0e23\u0e35\u0e22\u0e19\u0e40\u0e1b\u0e47\u0e19\u0e25\u0e33\u0e14\u0e31\u0e1a \u0e44\u0e21\u0e48\u0e43\u0e0a\u0e48\u0e2d\u0e48\u0e32\u0e19\u0e19\u0e34\u0e22\u0e32\u0e21\u0e01\u0e23\u0e30\u0e42\u0e14\u0e14\u0e44\u0e1b\u0e21\u0e32 \u0e40\u0e23\u0e34\u0e48\u0e21\u0e40\u0e25\u0e22\u0e15\u0e2d\u0e19\u0e19\u0e35\u0e49<\/p>\n","protected":false},"author":2,"featured_media":697,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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