Value changes are protocolled in CEL, although there is no change
I do have a couple of variables inside my project, which are working very fine when I start my zenOn runtime. But when I watch my CEL, I can see that there are some variable permanently protocolled. Even when their value doesn´t change.
It might be that those variables are not stable inside the PLC. They change theirs value very quickly, that it can´t been seen inside a normal dynamical element.
To make sure of this behavior, the easiest was is to create a dummy-archiv and add these variables. (set the archive to spontaneous!)
Then you should be able to see very clearly if such non-stable variables cause this effects.
If there is no chance to solve this problem inside your PLC, you can try it via the "zenOn-hysteresis". It´s exactly for such cases.
This is a migrated post! Originally posted on 21.08.2007 by user markusw. Please be aware that information can be outdated.