the time is very important

[tawfeeq88]

Hi,
in my project i want to know how long time on the pump which is ON (30min,1h,or other) my PLC is AB ML1100.. how can i do it??

 

[Sergei Troizky]

It's not difficult to totalize time. Just locate a clock bit of reasonable period in S:4 word, and use its OSR to increment L word. Then recalculate L word into desired time units.

The problem is, that ML has no data area that would not be overwritten on project download, so the real actual value will be overwritten, by one from the last save of the project.
Can you store the value externally, in HMI for instance?