Hello everyone –
I have a quick question about an A-B ML1200 real time clock.
I have an application that has been in service for over two years that (among other things) produces a test sound on a siren at 8P on the 4 Tues of each month.
The owner called me 2 weeks ago and said that someone noticed that the siren was about 30 min early.
I checked RTC under the function file, and sure enough, the time was about 30 minutes ahead.
My experience with PC's is that their clocks can fall behind when the PC sees a lot of activity (maybe a busy CPU??) or other times I have notice that the time actually gains (I seem to notice this when the PC was on, but not used much for a long period of time).
Does anyone else have any experience or comments on PLC real time clock time changes? Is there something I should be checking?
Thanks in advance -
OFG
I have a quick question about an A-B ML1200 real time clock.
I have an application that has been in service for over two years that (among other things) produces a test sound on a siren at 8P on the 4 Tues of each month.
The owner called me 2 weeks ago and said that someone noticed that the siren was about 30 min early.
I checked RTC under the function file, and sure enough, the time was about 30 minutes ahead.
My experience with PC's is that their clocks can fall behind when the PC sees a lot of activity (maybe a busy CPU??) or other times I have notice that the time actually gains (I seem to notice this when the PC was on, but not used much for a long period of time).
Does anyone else have any experience or comments on PLC real time clock time changes? Is there something I should be checking?
Thanks in advance -
OFG