Issue
A backup device is required for an IC3-Modbus.
Product Line
Satchwell Sigma
Environment
- Sigma
- IC3-Modbus
Cause
Is it possible to use two IC3-Modbus controllers to interrogate one Modbus slave device?
Resolution
This configuration is acceptable where TCP is used, it cannot be used for RS485 RTU communications.
Each Modbus device on a TCP network must have a unique ID but everything else (such as register address, type, Gateway IP address) may be identical.
In a RS485 RTU modbus environment, there can only be one master device.
