What is the name of the switch that, if in the REM position, allows the mode of an online PLC to be changed using the Studio 5000 software?

The mode switch, when set to the REM (remote) position, enables the online Programmable Logic Controller (PLC) to be reconfigured through the Studio 5000 software. This functionality is essential in industrial automation environments, as it allows changes to be made to the PLC’s programming while the system is actively running. The REM position signifies that the PLC is under remote control, meaning that communication with the programming environment is possible for making adjustments, diagnostics, or monitoring while the program continues to execute.

This capability is crucial for maintaining operational efficiency and making quick updates or modifications without needing to stop production or service. Essentially, the mode switch acts as a control point for how the PLC responds to external commands and configurations, allowing for flexibility in programming and operation.