Specifying tuning

To specify tuning:
  • Select the
    Tuning
     tab.
  • Changes take affect as soon as you click another field, select
    OK
    , select
    Apply
    , or press
    Enter.
    In this field:
    Specify:
    Setpoint (SP)
    Enter a setpoint value (.SP).
    Set output %
    Enter a set output percentage (.SO).
    In software manual mode, this value is used for the output.
    In auto mode, this value displays the output %.
    Output bias
    Enter an output bias percentage (.BIAS)
    Proportional gain (K
    p
    )
    Enter the proportional gain (.KP).
    For independent gains, it’s the proportional gain (unitless).
    For dependent gains, it’s the controller gain (unitless).
    Integral gain (K
    i
    )
    Enter the integral gain (.KI).
    For independent gains, it’s the integral gain (1/sec).
    For dependent gains, it’s the reset time (minutes per repeat).
    Derivative time (K
    d
    )
    Enter the derivative gain (.KD).
    For independent gains, it’s the derivative gain (seconds).
    For dependent gains, it’s the rate time (minutes).
    Manual mode
    Select either manual (.MO) or software manual (.SWM).
    Manual mode overrides software manual mode if both are selected.
    Reset
    Click this button to reset the gain values to the values that were in place when you opened the PID Setup dialog box.
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