The CTM-ONE is linked to a SCADA server, positioned where the SCADA server is located.
MODBUS Slaves or Slave Gateways communicate with the Master Gateway, which in turn communicates with the SCADA server via RS232 or RS485.
A MODBUS Master Gateway is only necessary when the SCADA server communicates with the Slave devices via RS232. If the SCADA server can communicate via TCP/Ethernet, a Master Gateway is unnecessary.
Required Configuration Settings
Setting Name | Description | Value |
Mode | Configure device to act as a Master Gateway | MODBUS Gateway Master |
WAN Encapsulation | Protocol used to communicate with remote Slave Gateway | TCP or RTU over UDP - Should match Slave Gateway |
Protocol | Protocol used to local talk to SCADA Server via RS-232/485 | ASCII or RTU - Must match SCADA Server |
Remote MODBUS Gateway Slaves
| Master gateway requires a list of ALL Slaves it is trying to communicate with. |
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