Continuous Scan Command (Execute Menu)

Click or select the menu command Execute > Scan Mode > Continuous Scan to set up the CPU for executing the program in a continuous cycle (in the same way that OB1 is executed by the CPU). The CPU executes the program when the operating mode is set to RUN, and stops when the operating mode is set to STOP.

The scan starts by reading the peripheral inputs (PI) and updating the process-image input (I) memory. The CPU then executes the instructions of the program and updates the memory areas. The scan ends by writing the process-image output (Q) memory to the peripheral-output (PQ) memory.