I have a controller that is doing something I don't understand on startup. It is a SX controller, 13.3.1, PCSD V13, with Version Control.
I know it's not ideal to remove power from a DCS controller. We are working to improve the UPS and power systems.
I have a question related to how a controller, modules within the controller, and ?? are controlled on a powerup. From the event data, It appears a COLD_RESTART was triggered.
Does the "Always Disabled " on the controller mean that it always cold starts and reloads DB values? We have some that have a time limit of 2 days. I thought if, Always Disabled, it wouldn't ever load from DB.
Some of the messages in the event data seem to be overriding individual attributes. Is this from the Parameter level "Restore Parameter Value after Restart"
Another thought- Let's say I changed an online value, maybe tuning value of PID gain. I checked out module from DB, didn't go online but manually changed affected parameter, then checked back in WITHOUT downloaded. So my version changed in VCAT but wasn't downloaded. If the controller cold restarts, will it pull the data from the newest VCAT version or somewhere else?
Sorry for sporadic questions. I know my data is changing on power up but not sure how.
Thanks in advance.
EVENT DATA
Controller Settings
Module Settings on individual parameter