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PRODUCT SPECIFICATION

时间:2014-3-21 7:28:41 作者:2893110592 来源:PR 阅读:1724次
PRODUCT SPECIFICATION

PRODUCT SPECIFICATION
VP Series PLC Communication Protocol
V1.1a

一、  簡介.......................................................................................................................... 3
二、  軟體規範................................................................................................................... 3
三、  機能.......................................................................................................................... 3
四、  連線方式................................................................................................................... 6
五、  通訊格式介紹:........................................................................................................ 7
1.  通訊資料協定........................................................................................................ 7
2.  通訊資料格式........................................................................................................ 7
i. ASCII Mode................................................................................................... 7
ii. RTU Mode..................................................................................................... 8
3.  通訊工作方式........................................................................................................ 8
4.  錯誤訊息回應........................................................................................................ 9
六、  MODBUS通訊命令格式:..................................................................................... 10
‹ Function 01:Read Coil Status........................................................................... 10
‹ Function 02:Read Input Status......................................................................... 12
‹ Function 03:Read Holding Registers ............................................................... 13
‹ Function 05:Force Single Coil .......................................................................... 15
‹ Function 06:Preset Single Register.................................................................. 16
‹ Function 0F:Force Multiple Coils...................................................................... 17
‹ Function 10:Preset Multiple Register ............................................................... 18
七、  備註........................................................................................................................ 19
‹ 備註 1:CRC 規格.............................................................................................. 19
‹ 備註 2:Exception Code..................................................................................... 19
‹ 備註 3:DVP-PLC通訊元件位址........................................................................ 20

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