Zelio SR2 Hour Meter Resets or Does Not Retain Values After Power Cycle

Question:

What should be checked if the hour meter on a Zelio SR2 smart relay resets or does not retain its value after a power cycle?

Answer:

If the hour meter value is not being retained after a power cycle, first confirm that the application logic and counter/latching configuration are correct.

In the Zelio SR2, latched values must be retained using the correct startup behaviour. On the physical module, check the startup setting from the display:

1. Go to the RUN/STOP menu.
2. Before running the program, ensure NO NONVOLAT INI is selected.
3. Do not use the default WITH NONVOLAT INI setting if retained values are required.

Selecting NO NONVOLAT INI allows latched counter values, such as hour meter values, to be retained on restart.

If the program has been tested in simulation and the hour counter does not reset during a simulated power outage, this generally confirms that the application logic and latching settings are correct. The next step is to verify the physical module’s startup setting as above.

Released for: Schneider Electric New Zealand