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  • 1. BX9000做下位机内部地址modbus tcp的对应关系
  • 2. CX9020的Modbus TCP通信地址问题。以前我们用的TwinCAT2 。比如定义QX100.0。对应安卓程序写的地址是50.0。现在升级成TwinCAT3，一样定义QX100.0 。对应安卓程序地址写50.0就连接不通,怎么解决？
  • 3. TwinCAT 3做Modbus TCP通讯，工控机上开启防火墙之后，通讯不了，该如何处理？
  • 4. 用Modbus TCP Client或TCP/IP功能块报32770错误？
  • 5. modbus功能码和指令如何对应？
  • 6. PLC做MODBUS TCP CLIENT通讯有问题，写数据到SERVER时报错 ErrorID ： 0x8002
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TF625x/TF6310 | TwinCAT 3 ModbusTCP/RTU ...

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5. modbus功能码和指令如何对应？

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https://infosys.beckhoff.com/content/1033/tf6250_tc3_modbus_tcp/72057594230678923.html?id=2997012859558650866



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