MGate MB3000 Modbus Gateway User Manual
Protocol Settings
Mode
The MGate gateway supports Modbus RTU/ASCII and Modbus TCP protocols. 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:
Modbus RTU slave(s) will be connected to the serial port.
A Modbus RTU master will be connected to the serial port.
Modbus ASCII slave(s) will be connected to the serial port.
A Modbus ASCII master will be connected to the serial port.
Protocol settings will be disabled in the serial port
• For entry-level models (MB3180, MB3280, and MB3480), Modbus TCP clients will control Modbus
RTU/ASCII slaves, and Modbus RTU/ASCII masters will control Modbus TCP servers.
• For advanced models (MB3170, MB3270), 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.
Select the ProCOM Enable checkbox located in the center of the page to enable ProCOM. For detailed
information, refer to the ProCOM function description in this manual.
ProCOM
ProCOM is a Moxa proprietary function that creates virtual serial ports on the MGate MB3x70 Series to make
fieldbus gateway communications more versatile. This intelligent fieldbus gateway mimics the behavior of a
native serial port when transmitting data to the desired destination. PCs can use ProCOM to communicate
over the Ethernet with serial devices connected to the MGate MB3x70 as if they were connected to the PC’s
native COM ports. This advanced feature only works with the MGate MB3x70 Series. For the detailed
ProCOM mapping configuration, please check ProCOM Mapping.
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