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    How is PID programmed on the ATV320 drives?

    Issue:
    How is PID programmed on the ATV320 drives?

    Product line:
    ATV320, Altivar 320

    Environment:
    all

    Cause:
    To maintain pressure, temperature or flow within a system

    Resolution:
    Using the dial on the display, Push Enter and turn to CONF > FULL > FUN > PID.

    Under the PID Regulator menu set:
    PIF - PID feedback assignment

    PIF1 - Min PID feedback
    PIF2 - Max PID feedback
    PIP1 - Min PID reference
    PIP2 - Max PID reference

    PII - Act. Internal PID ref

    RPI - Internal PID ref


    Min/Max PID Reference and Feedback are typically set to the range of the transducer.  Act. Internal PID turns on the internal set point.  Internal PID ref is the set point you want to maintain.  

    Example:
    You have a transducer, 4-20mA output follows a 0-100PSI range.  You want to maintain 40PSI pressure.  The recommended settings would be:
    You will need to change the AI3 range from 0-20mA to 4-20mA from the I-O menu then AI3 then CRL3 change it to 4.0

    PIF - AI3 
    PIF1 - 0
    PIF2 - 100
    PIP1 - 0
    PIP2 - 100
    PII - yes
    RPI - 40

    This would maintain 40PSI (10.4mA feedback) in the system based on 4-20mA signal coming into AI3.  
    Feedback < 10.4mA will increase motor speed. 
    Feedback > 10.4mA will decrease motor speed.
    If the VFD reaction needs to be reversed, set PiC, PID correct reverse, to YES.,

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