WEG CFW700 User Manual - page 40
CFW700 | 35
Keypad (HMI) and Basic Programming
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“CO/DN/DP” means that the setpoint of the PID regulator will be the value of P0685
proportionally referenced to the percentage value with one decimal point, i.e., 100.0 %
corresponds to 1000 in P0685.
P1018 – PID Feedback Scale
Adjustable
Range:
0.0 to 3000.0
Factory
Setting:
100.0
Properties:
-
Access Groups
via HMI:
SPLC
Description:
Defines how the PID Feedback or Process Variable will be presented in P1012 (as well as
the PID setpoint in P1011), i.e., the full scale of the PID feedback or process variable that
corresponds to 100.0 % in the analog input used as the PID regulator feedback.
The variable will always be with one decimal point “wxy.z”, i.e., one place after the dot.
Example: The pressure transducer is a 4-20 mA with 0-25 bar range. Set P1019 to 25.0.
P1020 – PID Proportional Gain
P1021 – PID Integral Gain
P1022 – PID Differential Gain
Adjustable
Range:
0.000 to 30.000
Factory
Setting:
P1020 = 1.000
P1021 = 0.430
P1022 = 0.000
Properties:
-
Access Groups
via HMI:
SPLC
Description:
These parameters define the PID regulator application gains and they should be set according
to the application being controlled.
Examples of initial settings for some applications are presented in
.
Table 4.1: Recommended settings for the PID regulator gains
Variable
Gains
Proportional
P1020
Integral
P1021
Derivative
P1022
Pneumatic system Pressure
1
0.430
0.000
Pneumatic system flow
1
0.370
0.000
Hydraulic system Pressure
1
0.430
0.000
Hydraulic system flow
1
0.370
0.000
Temperature
2
0.040
0.000
Level 1 - See note bellow
1
See note below
0.000