Our customer has a business need to be able to manually adjust previous hour/day/month etc of a flowTotal record. So that it provides accurate information in the control room so that GCN records can be met and gas used can be properly tracked.
Often times they have bad points that are sending incorrect information. They need to adjust for these readings.
A couple of solutions were discussed but nothing finalaized.
1. Add a manual analog value to every single flowtotal record. This record can add the missing flow of a bad reading to make the value correct.
This option has a few flaws.
A: If the inconsistent flow was caught after multiple hours have passed. The previous hour and current day record are out of wack. We would need to add the full value of missing gas to the manual analog. This means we now need to make sure at the top of the hour the correction analog is set back to 0 or set to the correction/hour value.
We can potentially handle this with ace routines but the problem the customer has with this method is that it creates a large single previous correction hour.
When they would rather have the one hour fixed and the rest added to the current day.
B. Allow the user to adjust the integration blocks directly. I.e provide function puts similar to alarm adjustments to the points directly.
If my previous hour was 20 and my current day was 60. If I change my previous hour to 25 my current day should also change to 65 and current month to value + 5.
Similar if I change my current day. It will only adjust current day and current month etc.
The problem with this currently is that the integration blocks are not replicated between systems. If any changes are made they will be lost on failover/mode switch/crash etc.
Second this generates inconsistent data between historical and realtime. This is similar to there current system and are okay with this.
