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Changes for page 07 Communication

Last modified by Devin Chen on 2024/08/19 14:28
From version 17.1
edited by Theodore Xu
on 2024/08/08 10:10
Change comment: There is no comment for this version
To version 1.1
edited by Leo Wei
on 2022/06/08 12:57
Change comment: Imported from XAR

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1 -PLC Editor.WebHome
1 +PLC Editor.1 User Manual.WebHome
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1 -XWiki.AiXia
1 +XWiki.admin
Content
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1 -= **PLC COM2 Modbus RTU** =
1 += **1 PLC COM2 Modbus RTU** =
2 2  
3 -== **Protocol Setting (D8126)** ==
3 +== **1.1 Protocol Setting (D8126)** ==
4 4  
5 -|=(% scope="row" %)**Protocol**|=**Description**|=**Value of D8126**
6 -|=WECON PLC Protocol|Using WECON PLC Protocol|01H
7 -|=MODBUS RTU Master|PLC is slave device|02H
8 -|=MODBUS ASCII Master|PLC is slave device|03H
9 -|=User-defined Protocol|Using User-defined Protocol|10H
10 -|=MODBUS RTU Slave|PLC is master device|20H
11 -|=MODBUS ASCII Slave|PLC is master device|30H
5 +(% border="1" %)
6 +|**Protocol**|**Description**|**Value of D8126**
7 +|WECON PLC Protocol|Using WECON PLC Protocol|01H
8 +|MODBUS RTU Master|PLC is slave device|02H
9 +|MODBUS ASCII Master|PLC is slave device|03H
10 +|MODBUS RTU Slave|PLC is master device|20H
11 +|MODBUS ASCII Slave|PLC is master device|30H
12 12  
13 -== **Communication format (D8120)** ==
13 +== **1.2 Communication Format (D8120)** ==
14 14  
15 15  (% border="1" %)
16 16  |(% rowspan="2" %)**Item**|(% rowspan="2" %)**parameter**|(% colspan="8" %)**Bit value of D8120**
... ... @@ -39,14 +39,11 @@
39 39  |Even|-|-|-|-|-|1|1|-
40 40  |(% rowspan="2" %)Data bit|7 bit|-|-|-|-|-|-|-|0
41 41  |8 bit|-|-|-|-|-|-|-|1
42 -|(% colspan="10" %)Example: the communication format is 9600.1.8.None, b7b6b5b4=1000, b3=0, b2b1=00, b 0=1. D8120=81H ( (10000001),,2,,=81H, 81H means hexadecimal number)
42 +|(% colspan="10" %)Example: the communication format is 9600.1.8.None, b7b6b5b4=1000, b3=0, b2b1=00, b 0=1. D8120=81H ( (10000001),,2,,=81H, 81H means [[hexadecimal>>path:C:/Users/Administrator/AppData/Local/Yodao/DeskDict/frame/20140818134937/javascript:void(0);]] [[number>>path:C:/Users/Administrator/AppData/Local/Yodao/DeskDict/frame/20140818134937/javascript:void(0);]])
43 43  
44 -(% class="box infomessage" %)
45 -(((
46 46  **✎Note:** If use Data bit=7.Parity can not choose None.
47 -)))
48 48  
49 -== **WECON PLC - MODBUS (Slave) addresses rules** ==
46 +== **1.3 WECON PLC - MODBUS (Slave) addresses rules** ==
50 50  
51 51  (% border="1" %)
52 52  |(% colspan="3" %)** PLC Bit Address**
... ... @@ -57,9 +57,9 @@
57 57  |S0 ~~ S999|0xE000 ~~ 0xE3E7|57344 ~~ 58343
58 58  |T0 ~~ T256|0xF000 ~~ 0xF100|61440 ~~ 61696
59 59  |C0 ~~ C255|0xF400 ~~ 0xF4FF|62464 ~~ 62719
60 -|X0 ~~ X377|0xF800 ~~ 0xF8FF|63488 ~~ 63743
61 -|Y0 ~~ Y377|0xFC00 ~~ 0xFCFF|64512 ~~ 64767
62 -|(% colspan="3" %)** PLC Word Address**
57 +|X0 ~~ X255|0xF800 ~~ 0xF9FE|63488 ~~ 63998
58 +|Y0 ~~ Y255|0xFC00 ~~ 0xFDFE|64512 ~~ 65022
59 +|(% colspan="3" %)** PLC Word Address**
63 63  |(% rowspan="2" %)PLC Address|(% colspan="2" %)MODBUS Address
64 64  |Hex|Decimal
65 65  |D0 ~~ D8255|0 ~~ 0x203F|0 ~~ 8255
... ... @@ -67,9 +67,9 @@
67 67  |C0 ~~ C199|0xF400 ~~ 0xF4C7|62464 ~~ 62663
68 68  |C200 ~~ C255|0xF700 ~~ 0xF7FF|63232 ~~ 63487
69 69  
70 -== **MODBUS function code introduction** ==
67 +== **1.4 MODBUS Function Code Introduction** ==
71 71  
72 -**Function code 0x01(01): read coil (bit address)**
69 +**(1) Function code 0x01(01): read coil (bit address)**
73 73  
74 74  Frame format: Station number of slave&0x01 + start address + number of coils + CRC
75 75  
... ... @@ -81,7 +81,7 @@
81 81  |4|(% style="width:352px" %)Number of coils|(% style="width:252px" %)2 bytes|
82 82  |5|(% style="width:352px" %)CRC|(% style="width:252px" %)2 bytes|
83 83  
84 -**Function code 0x03(03): read register (word address)**
81 +**(2) Function code 0x03(03): read register (word address)**
85 85  
86 86  Frame format: Station number of slave&0x03 + start address+ number of registers + CRC
87 87  
... ... @@ -93,7 +93,7 @@
93 93  |4|Number of registers|2 bytes|
94 94  |5|CRC|2 bytes|
95 95  
96 -**Function code 0x05(05): write single coil**
93 +**(3) Function code 0x05(05): write single coil**
97 97  
98 98  Frame format: Station number of slave&0x05 + address + state of coil + CRC
99 99  
... ... @@ -105,7 +105,7 @@
105 105  |4|State of coil|2 bytes|
106 106  |5|CRC|2 bytes|
107 107  
108 -**Function code 0x06 (06): Write single register**
105 +**(4) Function code 0x06 (06): Write single register**
109 109  
110 110  Frame format: Station number of slave&0x06 + address + value + CRC
111 111  
... ... @@ -117,7 +117,7 @@
117 117  |4|Value of register|2 bytes|
118 118  |5|CRC|2 bytes|
119 119  
120 -**Function code 0x0f(15): Write continuous coils**
117 +**(5) Function code 0x0f(15): Write continuous coils**
121 121  
122 122  Frame format: Station number of slave&0x0f + start address + number of coils + length + state of coil + CRC
123 123  
... ... @@ -131,7 +131,7 @@
131 131  |6|State of coils|[(N+7)/8] bytes|
132 132  |7|CRC|2 bytes|
133 133  
134 -**Function code 0x10 (10): Write continuous registers**
131 +**(6) Function code 0x10 (10): Write continuous registers**
135 135  
136 136  Frame format: Station number of slave&0x10 + start address + number of registers + length + value of register + CRC
137 137  
... ... @@ -145,61 +145,66 @@
145 145  |6|Value of register|N*2 bytes|
146 146  |7|CRC|2 bytes|
147 147  
148 -== **Example** ==
145 +== **1.5 Example** ==
149 149  
150 -**Read bit address from device**
147 +**(1) Read bit address from device**
151 151  
149 +**(When reading the bit address, the return value of 256 means that the coil is turned ON, and the return value of 0 means that the coil is turned OFF.)**
150 +
152 152  (% style="text-align:center" %)
153 -[[image:1641781999957-637.png||height="390" width="750" class="img-thumbnail"]]
152 +[[image:1641781999957-637.png||class="img-thumbnail" height="390" width="750"]]
154 154  
155 -**Read word address from device**
154 +**(2) Read word address from device**
156 156  
157 157  (% style="text-align:center" %)
158 -[[image:1641782024282-424.png||height="439" width="750" class="img-thumbnail"]]
157 +[[image:1641782024282-424.png||class="img-thumbnail" height="439" width="750"]]
159 159  
160 -**Write single coil**
159 +**(3) Write single coil**
161 161  
162 162  (% style="text-align:center" %)
163 -[[image:1641782057319-761.png||height="440" width="750" class="img-thumbnail"]]
162 +[[image:1641782057319-761.png||class="img-thumbnail" height="440" width="750"]]
164 164  
165 -Tip: (When writing a single coil or a continuous coil, write HFF00 to turn the coil on, and write H0000 to turn off the coil.)
164 +**Tip:**
166 166  
167 -**Write single register**
166 +**(When writing a single coil or a continuous coil, write HFF00 to turn the coil on, and write H0000 to turn off the coil.)**
168 168  
168 +**(4) Write single register**
169 +
169 169  (% style="text-align:center" %)
170 -[[image:1641782078927-432.png||height="442" width="750" class="img-thumbnail"]]
171 +[[image:1641782078927-432.png||class="img-thumbnail" height="442" width="750"]]
171 171  
172 -**Write continuous coils**
173 +**(5) Write continuous coils**
173 173  
174 174  (% style="text-align:center" %)
175 -[[image:1641782101687-540.png||height="452" width="750" class="img-thumbnail"]]
176 +[[image:1641782101687-540.png||class="img-thumbnail" height="452" width="750"]]
176 176  
177 -**Write continuous registers**
178 +**(6) Write continuous registers**
178 178  
179 179  (% style="text-align:center" %)
180 -[[image:1641782118748-978.png||height="448" width="750" class="img-thumbnail"]]
181 +[[image:1641782118748-978.png||class="img-thumbnail" height="448" width="750"]]
181 181  
182 -**PLC is slave devic**
183 183  
184 +**(7) PLC is slave devic**
185 +
184 184  [[image:1641782203514-616.png||height="230" width="746"]]
185 185  
186 186  
187 -**WECON PLC Protocol (COM2)**
189 +**(8) WECON PLC Protocol (COM2)**
188 188  
189 189  [[image:1641782240401-942.png||height="161" width="754"]]
190 190  
191 -= (% style="color:inherit; font-family:inherit" %)**N:N network**(%%) =
193 += (% style="color:inherit; font-family:inherit" %)**2 N:N network**(%%) =
192 192  
193 193  **LX3VP COM2 N:N Application**
194 194  
195 -== **LX3VP COM2 N:N Connection** ==
197 +== **2.1 LX3VP COM2 N:N Connection** ==
196 196  
197 -PLC built-in N:N connection protocol provides an effective way to exchange data among multiple PLC (Max. 8 devices). Technically, it only requires the twisted pair RS485 cable to connect with each PLC COM2 (in parallel).
199 +PLC built-in N:N connection protocol provides a effective way to exchange data among multiple PLC (Max. 8 devices). Technically, it only requires the twisted pair RS485 cable to connect with each PLC COM2 (in parallel).
198 198  
199 199  (% style="text-align:center" %)
200 -[[image:9.Communication example_html_8c43baa1ae891689.jpg||height="142" width="500" class="img-thumbnail"]]
202 +[[image:9.Communication example_html_8c43baa1ae891689.jpg||class="img-thumbnail" height="142" width="500"]]
201 201  
202 -== **COM2 N:N Instructions  ** ==
204 +=== **2.1.1 COM2 N:N Instructions  ** ===
203 203  
204 204  User should put data to specified register unit. Exchanging the data among PLCs, This function only requires putting data in preset register block, all the data in this register block would share with other PLCs. There are five modes for choice, according to data volume and communication speed. See the preset register block from table below.
205 205  
... ... @@ -230,12 +230,12 @@
230 230  Communication between each PLC (up to 8 PLC), please see the connection construction below (For 3 PLC interconnection).
231 231  
232 232  (% style="text-align:center" %)
233 -[[image:9.Communication example_html_b805bca9e1166337.jpg||height="93" width="600" class="img-thumbnail"]]
235 +[[image:9.Communication example_html_b805bca9e1166337.jpg||class="img-thumbnail" height="93" width="600"]]
234 234  
235 -== **Special devices in N: N network** ==
237 +=== **2.1.2 The special devices in N: N network** ===
236 236  
237 237  (% border="1" %)
238 -|=**Register**|=**Description**
240 +|**Register**|**Description**
239 239  |D8120|Communication format settings
240 240  |D8126|COM2 communication protocol settings, 40h means N:N Master Device, 04h means N:N Slave device
241 241  |D8176|Station number, from 0 to 7, 0 means master device
... ... @@ -261,10 +261,10 @@
261 261  )))
262 262  |M8191|Processing sending data
263 263  
264 -== **Communications format** ==
266 +=== **2.1.3 Communications format:** ===
265 265  
266 266  (% border="1" %)
267 -|=**Item**|=(% style="width: 115px;" %)**Parameters**|=(% style="width: 239px;" %)**b15(RS2)**|=**b14-b8**|=**b7**|=**b6**|=**b5**|=**b4**|=**b3**|=**b2**|=**b1**|=**b0**
269 +|**Item**|(% style="width:115px" %)**Parameters**|(% style="width:239px" %)**b15(RS2)**|**b14-b8**|**b7**|**b6**|**b5**|**b4**|**b3**|**b2**|**b1**|**b0**
268 268  |(% rowspan="2" %)**Bit mode**|(% style="width:115px" %)8 bit|(% style="width:239px" %)0|(% rowspan="15" %)Retention|-|-|-|-|-|-|-|-
269 269  |(% style="width:115px" %)16-bit|(% style="width:239px" %)1|-|-|-|-|-|-|-|-
270 270  |(% rowspan="6" %)**Baud rate (Bps)**|(% style="width:115px" %)115200|(% style="width:239px" %)-|1|1|0|0|-|-|-|-
... ... @@ -281,49 +281,32 @@
281 281  |(% rowspan="2" %)**Data bit**|(% style="width:115px" %)7 bit|(% style="width:239px" %)-|-|-|-|-|-|-|-|0
282 282  |(% style="width:115px" %)8 bit|(% style="width:239px" %)-|-|-|-|-|-|-|-|1
283 283  
284 -== **Communication error code (D8211~~D8218)** ==
286 +=== **2.1.4 Program example** ===
285 285  
286 -|=(% style="width: 195px;" %)**Error code**|=(% style="width: 881px;" %)**Description**
287 -|(% style="width:195px" %)1|(% style="width:881px" %)The monitoring period has elapsed, and the slave station has not responded to requests from the master station yet.
288 -|(% style="width:195px" %)2|(% style="width:881px" %)The other slave stations have responded to requests sent by the master station.
289 -|(% style="width:195px" %)3|(% style="width:881px" %)The count values in the parameter data do not match those responded by the slave stations.
290 -|(% style="width:195px" %)4|(% style="width:881px" %)The response messages from the slave stations are incorrect.
291 -|(% style="width:195px" %)17|(% style="width:881px" %)The monitoring period has elapsed,the master station has not sent a request to the next slave station yet.
292 -|(% style="width:195px" %)20|(% style="width:881px" %)The messages from the master station are incorrect.
293 -|(% style="width:195px" %)33|(% style="width:881px" %)The slave station is unresponsive.
294 -|(% style="width:195px" %)34|(% style="width:881px" %)The other slave stations have responded to requests sent by the master station.
295 -|(% style="width:195px" %)35|(% style="width:881px" %)The count values in the parameter data do not match those responded by the slave stations.
296 -|(% style="width:195px" %)49|(% style="width:881px" %)The slave station received requests from the master station before receiving the parameters.
297 -
298 -== **Program example** ==
299 -
300 300  LX3VP COM2 port communication parameters: 9600, 1, 8, NONE. Register block mode: 3
301 301  
302 302  **PLC as master**
303 303  
304 304  (% style="text-align:center" %)
305 -[[image:9.Communication example_html_a3fdef81ab69639.jpg||height="448" width="750" class="img-thumbnail"]]
293 +[[image:9.Communication example_html_a3fdef81ab69639.jpg||class="img-thumbnail" height="448" width="750"]]
306 306  
307 -**PLC as slave**
295 +PLC as slave
308 308  
309 309  (% style="text-align:center" %)
310 -[[image:9.Communication example_html_cc8af72b56d9c539.jpg||height="236" width="750" class="img-thumbnail"]]
298 +[[image:9.Communication example_html_cc8af72b56d9c539.jpg||class="img-thumbnail" height="236" width="750"]]
311 311  
312 -(% class="box infomessage" %)
313 -(((
314 -✎**Note:**
300 +**Note for use**
315 315  
316 316  * There are two modes of N:N protocol configuration. one is LX3VP built-in N:N protocol, the other one is LX3V N:N protocol (LX3V-2RS485-BD required).
317 317  * In LX3VP series PLC, only one kind of N:N configuration available. Second mode would be disabled when LX3VP built-in N:N protocol configured.
318 -)))
319 319  
320 -= (% style="color:inherit; font-family:inherit" %)**RS485-BD and ETH-BD communiaction**(%%) =
305 +== (% style="color:inherit; font-family:inherit" %)**3 RS485-BD and ETH-BD communiaction**(%%) ==
321 321  
322 322  Please kindly check the link as below.
323 323  
324 -(% class="box infomessage" %)
309 +(% class="box warningmessage" %)
325 325  (((
326 -✎**Note:** at present 5V PLC can not support RS485-BD and ETH-BD
311 +**Note:**at present 5V PLC can not support RS485-BD and ETH-BD
327 327  )))
328 328  
329 329  [[http:~~/~~/docs.we-con.com.cn/wiki/bdmodule/view/Main/Communication/2RS485-BD-3V/>>http://docs.we-con.com.cn/wiki/bdmodule/view/Main/Communication/2RS485-BD-3V/]]