Save Cold Ratain values
As you see in attached photo; this is part of logic in one of our CUP in project.hence i have a three question:
1: is it necessary we save retain value periodically?
2. have extension load on cup?
3.is occure problem if we remove this part of program?
if anyone can answer thanks.
1. It is necessary if cold retain variables change value. For example, PID parameters are usually cold retain, if someone made changes to them, they need to be saved. OPC Server AC800M has option to save periodically.
2. Do you mean System Extension? We can't say from your picture.
3. Nothing happens to logic if you remove this part. It is there for diagnostic and save cold retain values.