How do I clear the error status 16 # 8382 when I am connected to a Modbus TCP between SIMATIC S7-1500/S7-1200 and a SENTRON PAC device?

Create Date: 2024-8-30 12:03:23|Source: Siemens/Siemens

The S7-1500 CPU or S7-1200 CPU uses the "MB_CLIENT" command as a Modbus TCP client via the integrated PROFINET interface. Use the "MB_CLIENT" command to establish a connection between the Modbus TCP client and the Modbus TCP server.

How do I clear the error status 16 # 8382 when I am connected to a Modbus TCP between SIMATIC S7-1500/S7-1200 and a SENTRON PAC device?

Fig. 1

       In order to establish a connection to a SENTRON PAC device, it is necessary to change the value of the static variable "MB_Unit_ID" in the background block of the "MB_CLIENT" command. MB_UNIT_ID parameters correspond to the slave address in the Modbus RTU protocol. If a Modbus TCP server is used as a Modbus RTU protocol gateway, the slave devices in the serial network can be identified by MB_UNIT_ID parameters. In this case MB_UNIT_ID The parameters correspond to the correct Modbus RTU slave address. The static variable "MB_Unit_ID" has a default value of 16#FFhex= 255dec. However, the SENTRON PAC device only supports up to 16#7Fhex = 247dec, so the "MB_CLIENT" command will display 16#8382hex in the output status message. Specify that the static variable "MB_Unit_ID" has a startup value between 16#1hex and 16#7Fhex (1dec to 247dec).

How do I clear the error status 16 # 8382 when I am connected to a Modbus TCP between SIMATIC S7-1500/S7-1200 and a SENTRON PAC device?

Figure 2


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