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The CTM -ONE is a remote wireless gateway physically connected to another MODBUS Slave Device. The Slave Gateway can communicate with local devices via Ethernet, RS232, RS485, or GPIO Input/Output (Self Slave). Typically, the Slave Gateway communicates via a single protocol, such as RS232, although simultaneous communication via RS232 and Ethernet is also possible.

Setting Name

Descriptions

Value

Mode

Configure device to act as a Slave Gateway

MODBUS Gateway Slave

WAN Encapsulation

Protocol used to communicate with remote Master Gateway

TCP or RTU over UDP - Should match Master Gateway

Navigate to network → access → MODBUS RS-232 Access or MODBUS RS-485 Access

Enable WWAN access to serial data for Master

Enable and port number

Remote MODBUS Gateway Slaves

  1. Name

  2. ID

  3. Target

  4. TCP Slave IP

Slave Gateway requires a list of all the slaves connected to it and their pre-determined addresses.

  1. Friendly Name

  2. Slave ID

  3. Self-Slave, TCP Slave, Serial ASCII, Serial RTU

  4. LAN IP of TCP Slaves only. Else leave as 0.0.0.0.

Example of configuring a MODBUS TCP Slave with the CTM

...

serving as the Master Slave Gateway:

  1. Choose a Serial mode, either RS232 or RS485, and configure it as "MODBUS".

...