I'm in single chip microcomputer and PLC communication, using the Modbus rtu communication, for this a few address what physical address is

Address is on the graph data, urgent need, genuflect is begged ask people around a circle the nobody know...

CodePudding user response:

To address for PLC 01 0001 unit of data (data unit number meaning depends on manual, each different modbus devices) to 0017 h (16) is the hex value for the CRC check of 9804

CodePudding user response:

refer to the building program small baboons reply:

I'm in single chip microcomputer and PLC communication, using the Modbus rtu communication, for this a few address what physical address is

Address is on the graph data, urgent need, genuflect is begged ask people around a circle the nobody know...

The original poster please refer to http://www.ad.siemens.com.cn/service/article/wap/S7-200/S7-200modbus/Default.aspx