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Old June 21st, 2017, 01:42 AM   #3

RowdyDoc is offline
Join Date: Jun 2017
Location: Perth
Posts: 3
Thanks for your comments. Definitely worked in similar ways to what you describe for the development work and also tried to maintain this sort of thing as a living system (with limited success I admit).

My focus is on an approach that minimises the manual intervention.

Have been looking at an OPC product called TopServer in the last couple of days. Has some very interesting features for ControlLogix that may help.
Things like how it monitors the PLC to detect downloads/online changes and triggers an automatic update of the tag database (via upload from the PLC I think) after this occurs.
TopServer also exposes it's tag parameters to the OPC client so maybe replacing the requirement for a database to hold this info.
Still needs some more investigation...
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