Pid Reference Parameters - Honeywell NXL Series Applications Manual

Page 50 (68)

4.10 PID Reference Parameters

2.9.1 PID activation
With this parameter you can activate or deactivate the PID controller or activate the pump and
fan control parameters.
0 = PID controller deactivated
1 = PID controller activated
2 = Pump and fan control activated. Parameter group P2.10 becomes visible.
2.9.2 PID reference
Defines which frequency reference source is selected for the PID controller.
Default value is 2.
0 = AI1 reference
1 = AI2 reference
2 = PID reference from the Keypad control page (Group K3, parameter P3.5)
3 = Reference from the fieldbus (FBProcessDataIN1)
2.9.3 Actual value input
0 AI1
1 AI2
2 Fieldbus (Actual value 1: FBProcessDataIN2; Actual value 2: FBProcessDataIN3)
3 Motor torque
4 Motor speed
5 Motor current
6 Motor power
7 AI1-AI2 (Actual 1 – Actual 2)
2.9.4 PID controller gain
This parameter defines the gain of the PID controller. If the value of the parameter is set to
100% a change of 10% in the error value causes the controller output to change by 10%.
If the parameter value is set to 0 the PID controller operates as ID-controller.
See examples below.
2.9.5 PID controller I-time
This parameter defines the integration time of the PID controller. If this parameter is set to 1,00
second a change of 10% in the error value causes the controller output to change by 10.00%/s.
If the parameter value is set to 0.00 s the PID controller will operate as PD-controller. See
examples below.
2.9.6 PID controller D-time
The parameter 2.9.5 defines the derivation time of the PID controller. If this parameter is set to
1,00 second a change of 10% in the error value during 1.00 s causes the controller output to
change by 10.00%. If the parameter value is set to 0.00 s the PID controller will operate as PI-
controller.
See examples below.
4
Description of parameters
Honeywell