DOCA0098EN-11

Local ID Settings and Device IDs

In order for an external Modbus TCP/IP client to access a device connected to the Com’X, each device must have a unique ID, or Local ID. TheLocal ID is automatically assigned whenever a device is created and is associated with a device's Slave ID.

The Slave ID is either

  • the configured Modbus ID of any device connected to the RS485 serial port,
  • the configured Modbus ID of a connected Modbus TCP/IP device, or
  • the ID used by a Modbus TCP/IP gateway that connects a device to an Ethernet network.

You can change the Local ID in Settings > Communication > Modbus Gateway > Device IDs. The Local ID must be unique and can only be changed if data logging is disabled for the device being updated.

The Devices page also provides the following information for each device:

  • Slave ID
  • Connection:  "Serial Port," IP address for remote devices, or Zigbee ID
  • Device Type as defined in Device Settings

** See Starting the Data Logging
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