User Documentation
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7.1.1 Basic Settings
The Basic Settings section includes the most common settings required by administrators to maintain
and control a Weidmüller Modbus Gateway.
7.1.1.1 Basic Settings Mode
The menu item Mode allows users to configure the Modbus operation modes.
Operation mode of physical serial port
The operation mode determines whether the device(s) that are connected to the serial port will operate
as master or as slave(s), and whether the Modbus RTU or Modbus ASCII protocol will be used.
Operation mode of up to 4 virtual COM-Ports (ProCom) which can be installed on a
Windows-PC
- running as
RTU/ASCII Master - to communicate with RTU/ASCII Slaves via Ethernet and the Modbus Gateway.
PCs can use ProCOM-Port driver to communicate over Ethernet with serial devices
(which are connected to the Modbus Gateway) as if they were connected to the PCe COM
ports.
Note: To use this feature you need to install the virtual COM-Ports (ProCom) with utility
Modbus Gateway Administrator. Please refer to chapter 7.2.9 how to configure.
There are four operation modes as follows:
RTU Slave One ore more Modbus RTU slave(s) shall be connected to the serial port.
RTU Master One Modbus RTU master shall be connected to the serial port.
ASCII Slave One ore more Modbus ASCII slave(s) shall be connected to the serial port.
ASCII Master One Modbus ASCII master shall be connected to the serial port.
Note: The Mode setting refers allways to the serial port and has to be set same as the connecting
device(s).
If you have connected one or more serial devices running as slave(s) then select either RTU
Slave or ASCII Slave.
If you have connected a serial Master (only 1 is allowed) then select either RTU Master or
ASCII Master.