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Appendix A—Description of parameters
VARIABLE SPEED DRIVE SERIES III LIT-12012999—June 2018 www.johnsoncontrols.com
Code Modbus ID Parameter Application RO/RW
P8.1.2 1357 PID2 Control I Time 2,3 RW
This parameter is used to defines the integration time constant of the PID Controller. Over the time the
integral time contributes to the deviation between the reference and the feedback signal. If this value is
set to 1.00 sec, a change of 10% in the error value causes the controller output to change by 10.00%/s.
With value set to 0.0, frequency converter operates as PD controller.
P8.1.3 1358 PID2 Control D Time 2,3 RW
This parameter is used to defines the derivation time constant of the PID Controller. This value will
adjust the rate of change on the feedback signal. If this value is set to 1.00 sec, a change of %10 in error
value during 1.00 sec causes the control output to change by %10.00. If value is set to 0.0, frequency
converter operates as PI controller
P8.1.4 1359 PID2 Process Unit 2,3 RW
This parameter is used to defines the unit type for PID controller. This will change the Feedback and
Setpoint variables to show the desired unit of measure.
P8.1.5 1360 PID2 Process Unit Min 2,3 RW
This parameter is used to defines the minimum process unit value for the PID controller.
P8.1.6 1362 PID2 Process Unit Max 2,3 RW
This parameter is used to defines the maximum process unit value for the PID controller.
P8.1.7 1364 PID2 Process Unit Decimal 2,3 RW
This parameter is used to defines the amount of decimal places used in the value for the PID Controller
setpoint.
P8.1.8 1365 PID2 Error Inversion 2,3 RW
This parameter defines the way the process value output reacts to the feedback signal.
0 = Normal, If feedback is less than set-point, PID controller output increases.
1 = Inverted, If feedback is less than set-point, PID controller output decreases.
P8.1.9 1366 PID2 Dead Band 2,3 RW
This parameter sets the PID Dead band around the set point in process units. This is a band where no
actions occur to the ouput of the PID controller, to prevent oscillation or repeated activation/deactivation
of controller.
P8.1.10 1368 PID2 Dead Band Delay 2,3 RW
This parameter sets the delay time, if the PID process value goes out of the Dead Band area for the
desired time delay at that point the controller will re-initialize and try to level out again.
P8.1.11 1373 PID2 Ramp Time 2,3 RW
This parameter defines the rising and falling ramp times for changes in the process value setpoint. The
ramp time corresponds to the time it takes to change the setpoint vlaue from minimum to the maximum,
if the value is 0 no ramps are used.
P8.2.1 2467 PID2 Wake Up Action 2,3 RW
Use this parameter to define the wakeup function action. This defines if a static absolute value is used
above or below the level setting or a relative value that changes based off the set point value.
0 - Wakeup when below wakeup level (Absolute Level)
1 - Wakeup when above wakeup level (Absolute Level)
2 - Wakeup when below wakeup level % from PID set point (Relative setpoint)
3 - Wakeup when above wakeup level % from PID set point (Relative setpoint)
P8.2.2 2546 FB PID2 Set Point 1 2,3 RW
PID Set point value from Network. Can be assigned to PID Set Point Source
P8.2.3 2548 FB PID2 Set Point 2 2,3 RW
PID Set point value from Network. Can be assigned to PID Set Point Source
P8.2.4 2552 FB PID2 Feedback 1 2,3 RW
PID Feedback value from Network. Can be assigned to PID Feedback Source
P8.2.5 2553 FB PID2 Feedback 2 2,3 RW
PID Feedback value from Network. Can be assigned to PID Feedback Source
P8.2.6 2556 FB PID2 Feedforward 1 2,3 RW
PID Feedforward value from Network. Can be assigned to PID Feedforward Source
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