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  • MODBUS Master Gateway

  • MODBUS Slave Gateway

    • TCP Slave

    • Serial Slave

    • Self-Slave

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Info

The mode setting of the serial port must be set to MODBUS for the RS-232/RS-485 port setting for MODBUS configuration to work even if no physical RS-232 or RS-485 devices are physically connected to the CTM-ONE.

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MODBUS Configuration is available on the CTM-ONE local web interface under serial <modbus tab.

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The RS-232 and RS-485 tabs expand for specific MODBUS functionality. The CTM-ONE supports simultaneous RS-232 and RS-485 protocols so individual configurations can exist for either protocol.

For Ethernet-based MODBUS communication (TCP / RTU over UDP), either MODBUS RS-232 or RS-485 can be used.