WEG CFW700 Serie Manual Del Usuario página 41

Keypad (HMI) and Basic Programming
Table 4.1: Recommended settings for the PID controller gains
Variable
Pneumatic system pressure
Pneumatic system flow
Hydraulic system pressure
Hydraulic system flow
Temperature
Level
NOTE!
For the level control, the integral gain settings will depend on the time it takes
for the reservoir to go through the minimum acceptable level to the desired
level, with the following conditions:
1. The time for the direct action should be measured with the maximum input
flow and minimum output flow.
2. The time for the reverse action should be measured with minimum input
flow and maximum output flow.
An equation to calculate the initial value of P1021 as a function of the system response time
is presented next:
P1021 = 5.00 / t,
Where: t = time (in seconds)
P1023 - Filter for the Control Setpoint of the PID
Adjustable 0.00 to 650.00 s
Range:
Properties:
-
Access Groups
SPLC
via HMI:
Description:
This parameter sets the value of the constant time of the setpoint filter of the PID regulator
and has the purpose of reducing abrupt changes in the PID setpoint value.
P1024 - PID Regulator Action Type
Adjustable
0 = Direct
Range: 1 = Reverse
Properties:
-
Access Groups
SPLC
via HMI:
Description:
The PID Controller action type should be selected as "Direct" when it is necessary that the motor
speed is increased in order to increment the process variable. Otherwise, the "Reverse" should
be selected.
36 | CFW700
Proportional
P1020
1
1
1
1
2
1 See note below
Gains
Integral Derivative
P1021 P1022
0.430 0.000
0.370 0.000
0.430 0.000
0.370 0.000
0.040 0.000
0.000
Factory
Setting:
Factory
Setting:
0.25 s
0