What occurs during PLC Run mode?

In PLC Run mode, the controller is actively executing the ladder program that has been loaded into it. This is the primary operational state of the PLC, where it processes inputs, executes the control logic defined in the program, and updates the outputs accordingly.

The correct choice highlights that during this mode, the PLC allows for monitoring of the system while the program is running. Users can typically perform actions such as uploading the current program or data from the PLC, saving changes made in the development environment to the PLC, and monitoring real-time operational data. While changes to the program itself may not be made in Run mode, monitoring and reviewing real-time data is a critical function for operational management and troubleshooting.

This capability to monitor is essential for ensuring that the system is functioning correctly and for diagnosing any issues that may arise during operation, solidifying the functionality of the PLC in a production environment.