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Introduction to MODBUS

The CTM-ONE and CTM-500 can support 4 types of MODBUS:

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Info

The mode setting of the serial port must be set to MODBUS for the RS232/RS485 port setting for MODBUS configuration to work even if no physical RS232 or RS485 devices are physically connected to the CTM -ONEdevice.

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

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The RS232 and RS485 tabs expand for specific MODBUS functionality. The CTM -ONE supports simultaneous RS232 and RS485 protocols so individual configurations can exist for either protocol.

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