DIN Toggle Switch
The reason for the toggle: We have 2 available Modbus ports on the PLC. One is used to communicate via radio-modem to a SCADA computer running Wonderware. The other is used to communicate to a VFD to transfer a number of parameters / values to and from the PLC. To modify/troubleshoot using a laptop requires disconnecting the VFD communications. Since the PLC acts as the Modbus Master to the VFD and needs to be a Modbus Slave to the Laptop we will use the toggle switch to disable the transmit functions from the PLC when we must communicate with the laptop. A third Modbus port would be a great solution but this PLC, a Momentum, will not support a third Modbus port, per the factory tech support.