G
I am from the Elec SCADA industry where data is sent to the SCADA Master in a report by exception basis (e.g. the data has changed X%).
I am now in Water working with PLCs where all the data is sent back to the Master software every communication scan collects every point.
The net effect of this is that it takes probably 10 times longer to scan all the devices as necessary. And it takes a long time for controls to happen because of the wait to scan all the station PLCs.
1. Is there a way to convert my SCADA modbus data retrieval to report by exception?
2. Are there algorithms for ladder logic to calculate the change by exception?
Any thoughts on this are welcomed.
G Brown
I am now in Water working with PLCs where all the data is sent back to the Master software every communication scan collects every point.
The net effect of this is that it takes probably 10 times longer to scan all the devices as necessary. And it takes a long time for controls to happen because of the wait to scan all the station PLCs.
1. Is there a way to convert my SCADA modbus data retrieval to report by exception?
2. Are there algorithms for ladder logic to calculate the change by exception?
Any thoughts on this are welcomed.
G Brown