User`s manual

MGate MB3000 User’s Manual Configuring the Modbus Gateway
9-10
Configure Serial Port for RTU or ASCII, Master or Slave
The Mode tab is where each serial port’s operation mode is configured. The operation mode
determines whether the device(s) that are connected to the serial port will operate as a master or a
slave, and whether the Modbus RTU or Modbus ASCII protocol will be used. There are four
operation modes as follows:
Mode Description
RTU Slave Modbus RTU slave(s) will be connected to the serial port.
RTU Master A Modbus RTU master will be connected to the serial port.
ASCII Slave Modbus ASCII slave(s) will be connected to the serial port.
ASCII Master A Modbus ASCII master will be connected to the serial port.
z For entry-level models (MB3180, MB3280, and MB3480), Modbus TCP masters will control
Modbus RTU/ASCII slaves, and Modbus RTU/ASCII masters will control Modbus TCP
slaves.
z For advanced models (MB3170, MB3270, and MB3470), both Modbus TCP and Modbus
RTU/ASCII masters can control Modbus TCP and Modbus RTU/ASCII slaves.
Use the radio buttons to select the desired operation mode for each serial port on the Modbus
gateway.