CPU Battery Monitoring

[Ezhil.k]

Is it Possible to Monitor PLC CPU Battery Voltage Level through Special Register in Mitsubishi QCPU other than when the Battery is Already Low????

 

[collinsd70]

Registers for QCPU:

• [SM51] Battery low latch
Turn ON when the voltage of battery reduces to less than 2.5[V].
Remains ON even if the condition is restored to normal thereafter.
• [SM52] Battery low
Turn ON when the voltage of battery reduces to less than 2.5[V].
Turn OFF when the voltage of external battery returns to normal.
• [SM58] Battery low warning latch
Turn ON when the voltage of battery reduces to less than 2.7[V].
Remains ON even if the condition is restored to normal thereafter.
• [SM59] Battery low warning
Turn ON when the voltage of battery reduces to less than 2.7[V].
Turn OFF when the voltage of external battery returns to normal.


Regards

Daniel

 

[Ezhil.k]

Thanks,
Also, is it possible to get battery voltage or level in word register?

 

[collinsd70]

No, sorry. Only what you see above.

 

[AlfredoQuintero]

There is no battery voltage level detection in system registers. There are a couple of system registers which provide a bit more info on the battery's condition.