How to obtain scan execution times in M340 and Quantum PLC

Issue
What are scan execution times in M340 and Quantum PLC

NOTE (definitions):
- The amount of time it takes to perform one cycle is referred to as scan time
- Cycle means perform all configured, programmed and enabled activities in a fixed sequence as fast as possible
- All scan times shown are in Milliseconds (ms)

Product Line
Unity Pro (software)
M340, Quantum (PLC)

Environment
System Addressing

Cause
Trouble shooting purpose

Resolution
Scan execution times can be obtained using system objects:

• %SW30    last scan
• %SW31    longest scan
• %SW32    shortest scan

You can use an animation table to look at the values:

You can also see those values in the PLC screen when online with the PLC

Released for: Schneider Electric USA