07 Communication

|(% 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

43

(% class="box infomessage" %)

44

(((

45

**✎Note:** If use Data bit=7.Parity can not choose None.

46

)))

47

48

== **WECON PLC - MODBUS (Slave) addresses rules** ==

49

50

(% border="1" %)

51

|(% colspan="3" %)** PLC Bit Address**

52

|(% rowspan="2" %)PLC Address|(% colspan="2" %)MODBUS Address

53

|Hex|Decimal

54

|M0 ~~ M3071|0 ~~ 0xBFF|0 ~~ 3071

55

|M8000 ~~ M8256|0x1F40 ~~ 0x2040|8000 ~~ 8256

56

|S0 ~~ S999|0xE000 ~~ 0xE3E7|57344 ~~ 58343

57

|T0 ~~ T256|0xF000 ~~ 0xF100|61440 ~~ 61696

58

|C0 ~~ C255|0xF400 ~~ 0xF4FF|62464 ~~ 62719

59

|X0 ~~ X377|0xF800 ~~ 0xF8FF|63488 ~~ 63743

60

|Y0 ~~ Y255|0xFC00 ~~ 0xFCFF|64512 ~~ 64767

61

|(% colspan="3" %)** PLC Word Address**

62

|(% rowspan="2" %)PLC Address|(% colspan="2" %)MODBUS Address

63

|Hex|Decimal

64

|D0 ~~ D8255|0 ~~ 0x203F|0 ~~ 8255

65

|T0 ~~ T255|0xF000 ~~ 0xF0FF|61440 ~~ 61695

66

|C0 ~~ C199|0xF400 ~~ 0xF4C7|62464 ~~ 62663

67

|C200 ~~ C255|0xF700 ~~ 0xF7FF|63232 ~~ 63487

68

69

== **MODBUS function code introduction** ==

70

71

**Function code 0x01(01): read coil (bit address)**

72

73

Frame format: Station number of slave&0x01 + start address + number of coils + CRC

74

75

(% border="1" %)

76

|No.|(% style="width:352px" %)Data|(% style="width:252px" %)Number of byte|Instruction

77

|1|(% style="width:352px" %)Station number of slave|(% style="width:252px" %)1 byte|Value range 1~~247, set by D8121

78

|2|(% style="width:352px" %)0x01（function code）|(% style="width:252px" %)1 byte|Read coil

79

|3|(% style="width:352px" %)Start address|(% style="width:252px" %)2 bytes|

80

|4|(% style="width:352px" %)Number of coils|(% style="width:252px" %)2 bytes|

81

|5|(% style="width:352px" %)CRC|(% style="width:252px" %)2 bytes|

82

83

**Function code 0x03(03): read register (word address)**

84

85

Frame format: Station number of slave&0x03 + start address+ number of registers + CRC

86

87

(% border="1" %)

88

|No.|Data|Number of byte|Instruction

89

|1|Station number of slave|1 byte|Value range 1~~247, set by D8121

90

|2|0x03 (function code)|1 byte|Read register

91

|3|Start address|2 bytes|

92

|4|Number of registers|2 bytes|

93

|5|CRC|2 bytes|

94

95

**Function code 0x05(05): write single coil**

96

97

Frame format: Station number of slave&0x05 + address + state of coil + CRC

98

99

(% border="1" %)

100

|No.|Data|Number of byte|Instruction

101

|1|Station number of slave|1 byte|Value range 1~~247, set by D8121

102

|2|0x05 (function code)|1 byte|Write single coil

103

|3|address|2 bytes|

104

|4|State of coil|2 bytes|

105

|5|CRC|2 bytes|

106

107

**Function code 0x06 (06): Write single register**

108

109

Frame format: Station number of slave&0x06 + address + value + CRC

110

111

(% border="1" %)

112

|No.|Data|Number of byte|Instruction

113

|1|Station number of slave|1 byte|Value range 1~~247, set by D8121

114

|2|0x06 (function code)|1 byte|Write single register

115

|3|address|2 bytes|

116

|4|Value of register|2 bytes|

117

|5|CRC|2 bytes|

118

119

**Function code 0x0f(15): Write continuous coils**

120

121

Frame format: Station number of slave&0x0f + start address + number of coils + length + state of coil + CRC

122

123

(% border="1" %)

124

|No.|Data|Number of byte|Instruction

125

|1|Station number of slave|1 byte|Value range 1~~247, set by D8121

126

|2|0x0f (function code)|1 byte|Write contunuous coils

127

|3|Start address|2 bytes|

128

|4|Number of coil|2 bytes|

129

|5|Length|1 bytes|

130

|6|State of coils|[(N+7)/8] bytes|

131

|7|CRC|2 bytes|

132

133

**Function code 0x10 (10): Write continuous registers**

134

135

Frame format: Station number of slave&0x10 + start address + number of registers + length + value of register + CRC

136

137

(% border="1" %)

138

|No.|Data|Number of byte|Instruction

139

|1|Station number of slave|1 byte|Value range 1~~247, set by D8121

140

|2|0x10 (function code)|1 byte|Write contunuous registers

141

|3|Start address|2 bytes|

142

|4|Number of registers|2 bytes|

143

|5|Length|1 bytes|

144

|6|Value of register|N*2 bytes|

|7|CRC|2 bytes|

== **Example** ==

**Read bit address from device**

150

151

(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.)

152

153

(% style="text-align:center" %)

154

[[image:1641781999957-637.png||height="390" width="750" class="img-thumbnail"]]

155

156

**Read word address from device**

157

158

(% style="text-align:center" %)

159

[[image:1641782024282-424.png||height="439" width="750" class="img-thumbnail"]]

160

161

**Write single coil**

162

163

(% style="text-align:center" %)

164

[[image:1641782057319-761.png||height="440" width="750" class="img-thumbnail"]]

165

166

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.)

167

168

**Write single register**

169

170

(% style="text-align:center" %)

171

[[image:1641782078927-432.png||height="442" width="750" class="img-thumbnail"]]

172

173

**Write continuous coils**

174

175

(% style="text-align:center" %)

176

[[image:1641782101687-540.png||height="452" width="750" class="img-thumbnail"]]

177

178

**Write continuous registers**

179

180

(% style="text-align:center" %)

181

[[image:1641782118748-978.png||height="448" width="750" class="img-thumbnail"]]

182

183

**PLC is slave devic**

184

185

[[image:1641782203514-616.png||height="230" width="746"]]

186

187

188

**WECON PLC Protocol (COM2)**

189

190

[[image:1641782240401-942.png||height="161" width="754"]]

191

192

= (% style="color:inherit; font-family:inherit" %)**2 N:N network**(%%) =

193

194

**LX3VP COM2 N:N Application**

195

196

== **LX3VP COM2 N:N Connection** ==

197

198

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).

199

200

(% style="text-align:center" %)

201

[[image:9.Communication example_html_8c43baa1ae891689.jpg||height="142" width="500" class="img-thumbnail"]]

202

203

== **COM2 N:N Instructions ** ==

204

205

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.

206

207

(% border="1" %)

208

|(% colspan="2" rowspan="3" %)**Station Number**|(% colspan="2" %)**Mode 0**|(% colspan="2" %)**Mode 1**|(% colspan="2" %)**Mode 2**

209

210

|**0**|**4**|**32**|**4**|**64**|**8**

211

|Master|NO. 0|~-~-|0-3|1000-1031|0-3|1000-1063|0-7

212

|(% rowspan="7" %)Slave|NO. 1|~-~-|32-35|1064-1095|32-35|1064-1127|32-39

213

|NO. 2|~-~-|64-67|1128-1159|64-67|1128-1191|64-71

214

|NO. 3|~-~-|96-99|1192-1223|96-99|1192-1255|96-103

215

|NO. 4|~-~-|128-131|1256-1287|128-131|1256-1319|128-135

216

|NO. 5|~-~-|160-163|1320-1351|160-163|1320-1383|160-167

217

|NO. 6|~-~-|192-195|1384-1415|192-195|1384-1447|192-199

218

|NO. 7|~-~-|224-227|1448-1479|224-227|1448-1511|224-231

219

220

221

|**64**|**16**|**64**|**32**| |

222

|Master|NO. 0|1000-1063|0-15|1000-1063|0-31| |

223

|(% rowspan="7" %)Slave|NO. 1|1064-1127|32-47|1064-1127|32-63| |

224

|NO. 2|1128-1191|64-79|1128-1191|64-95| |

225

|NO. 3|1192-1255|96-111|1192-1255|96-127| |

226

|NO. 4|1256-1319|128-143|1256-1319|128-159| |

227

|NO. 5|1320-1383|160-175|1320-1383|160-191| |

228

|NO. 6|1384-1447|192-207|1384-1447|192-223| |

229

|NO. 7|1448-1511|224-239|1448-1511|224-255| |

230

231

Communication between each PLC (up to 8 PLC), please see the connection construction below (For 3 PLC interconnection).

232

233

(% style="text-align:center" %)

234

[[image:9.Communication example_html_b805bca9e1166337.jpg||height="93" width="600" class="img-thumbnail"]]

235

236

== **Special devices in N: N network** ==

237

238

(% border="1" %)

239

|=**Register**|=**Description**

240

|D8120|Communication format settings

241

|D8126|COM2 communication protocol settings, 40h means N:N Master Device, 04h means N:N Slave device

242

|D8176|Station number, from 0 to 7, 0 means master device

243

|D8177|Total station number, from 1 to 7, only required for master device.

244

|D8178|Register block setting, from 0 to 5, only required for master device.

245

|D8179|Retry count settings, only required for master device.

246

|D8180|Timeout setting, unit: 10ms，only required for master device.

247

|D8201|Current connection scould time

248

|D8202|Maximum connection scould time

249

|D8203|Master error counter

250

|D8204~~D8210|Slave error counter

251

|D8211|Master N:N error code

252

|D8212~~D8218|Slave N:N error code

253

|M8183|Master data transfer sequence error

254

|M8183~~M8190|(((

255

Communication error flag:

256

257

M8183 - No.0 (Master);

258

259

M8184 - No. 1 (Slave 1)

......

)))

|M8191|Processing sending data

264

265

== **Communications format:** ==

266

267

(% border="1" %)

268

|=**Item**|=(% style="width: 115px;" %)**Parameters**|=(% style="width: 239px;" %)**b15(RS2)**|=**b14-b8**|=**b7**|=**b6**|=**b5**|=**b4**|=**b3**|=**b2**|=**b1**|=**b0**

269

|(% rowspan="2" %)**Bit mode**|(% style="width:115px" %)8 bit|(% style="width:239px" %)0|(% rowspan="15" %)Retention|-|-|-|-|-|-|-|-

270

|(% style="width:115px" %)16-bit|(% style="width:239px" %)1|-|-|-|-|-|-|-|-

271

|(% rowspan="6" %)**Baud rate (Bps)**|(% style="width:115px" %)115200|(% style="width:239px" %)-|1|1|0|0|-|-|-|-

272

|(% style="width:115px" %)57600|(% style="width:239px" %)-|1|0|1|1|-|-|-|-

273

|(% style="width:115px" %)38400|(% style="width:239px" %)-|1|0|1|0|-|-|-|-

274

|(% style="width:115px" %)19200|(% style="width:239px" %)-|1|0|0|1|-|-|-|-

275

|(% style="width:115px" %)9600|(% style="width:239px" %)-|1|0|0|0|-|-|-|-

276

|(% style="width:115px" %)4800|(% style="width:239px" %)-|0|1|1|1|-|-|-|-

277

|(% rowspan="2" %)**Stop bit**|(% style="width:115px" %)1 bit|(% style="width:239px" %)-|-|-|-|-|0|-|-|-

278

|(% style="width:115px" %)2 bit|(% style="width:239px" %)-|-|-|-|-|1|-|-|-

279

|(% rowspan="3" %)**Parity**|(% style="width:115px" %)None|(% style="width:239px" %)-|-|-|-|-|-|0|0|-

280

|(% style="width:115px" %)Odd|(% style="width:239px" %)-|-|-|-|-|-|0|1|-

281

|(% style="width:115px" %)Even|(% style="width:239px" %)-|-|-|-|-|-|1|1|-

282

|(% rowspan="2" %)**Data bit**|(% style="width:115px" %)7 bit|(% style="width:239px" %)-|-|-|-|-|-|-|-|0

283

|(% style="width:115px" %)8 bit|(% style="width:239px" %)-|-|-|-|-|-|-|-|1

284

285

== **Program example** ==

286

287

LX3VP COM2 port communication parameters: 9600, 1, 8, NONE. Register block mode: 3

**PLC as master**

(% style="text-align:center" %)

292

[[image:9.Communication example_html_a3fdef81ab69639.jpg||height="448" width="750" class="img-thumbnail"]]

**PLC as slave**

(% style="text-align:center" %)

297

[[image:9.Communication example_html_cc8af72b56d9c539.jpg||height="236" width="750" class="img-thumbnail"]]

298

299

(% class="box infomessage" %)

(((

✎**Note:**

* 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).

304

* 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.

305

)))

306

307

= (% style="color:inherit; font-family:inherit" %)**3 RS485-BD and ETH-BD communiaction**(%%) =

308

309

Please kindly check the link as below.

310

311

(% class="box infomessage" %)

312

(((

313

✎**Note:** at present 5V PLC can not support RS485-BD and ETH-BD

314

)))

315

316

[[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/]]

317

318

[[http:~~/~~/docs.we-con.com.cn/wiki/bdmodule/view/Main/Communication/LX3VP-ETH-BD/>>http://docs.we-con.com.cn/wiki/bdmodule/view/Main/Communication/LX3VP-ETH-BD/]]

Wiki source code of 07 Communication

Navigation

Table of Contents