PID Functional block with Digital O/P
I need to control one Digital control valve(DCV) who is having two Solenoid Coils one for upstream and one for downstream.
This controlling will be based on the flow and quantity of the fluid being filled in the Tank.
Flow will be having following phase.
1. Initial cut:- The flow will be less than 100 liter per minute, as if there is any leakage we can cross check.
2. After certain quantity like 10% of the preset the flow will ramp up to a high value.
3. This high flow will be maintained till 90% of the Preset.
4. After this ramp down process will start and flow will slow down till the 100% value of preset is delivered.
Now as we have analog input:- "Flow and Quantity being filled" and we need to control DCV.
How to acheive this function through PID block in Compact Control Builder M. Front end is Compact HMI.
Is there any PID block with single or doulbe digital output.
or is there any way to do this through PID block?
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