No. 1 and Tank No. 3. The result is stored in tank measurement variable Delta_Level in
Tank 1.
A Virtual Relay Output can be configured to use the measurement variable Delta_Level as
source parameter to trigger the relay whenever the level difference exceeds a specified
value.
Figure C-4: Arithmetic Operations are Configured in Holding Registers 4800 to 4879
Procedure
1. Choose subtraction.
2. Put the result in Tank Measurement Variable TMV_Delta_Level.
3. Put the result in Tank 1. Now the result will be stored in TMV_Delta_Level for Tank
1.
4. For arithmetic operation parameter A choose Tank Measurement Variable=Level.
5. Choose arithmetic operation parameter A from Tank 1.
6. For arithmetic operation parameter B choose Tank Measurement Variable=Level.
7. Choose arithmetic operation parameter B from Tank 3.
Advanced configuration Reference Manual
December 2019 00809-0100-2410
178 Reference Manual
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