MATHDR32 counter variable problem

MATHDR32 counter variable problem

We have system with 2 redundant servers ver. 7.0 and 2 clients. We count working hours for few machines using MATHDR32 variables that are recorded in historian. After a accidental power loss the servers restart and some (not all) of the counter variables changed their value. For example one of the variables went from 974 to 128 (this change is recorded in archive). What have gone wrong?

This is a migrated post! Originally posted on 27.05.2019 by user hm123. Please be aware that information can be outdated.