WEG CFW500 V1.8X, Руководство по программированию, Страница: 139 / 172

PID Controller
CFW500 | 13-7
13
On the screen of Figure 13.3 on page 13-7 is observed a setpoint of 20.0 bars on the secondary display, the
process variable also at 20.0 bars on the main display and the output speed at 80 % on the bar.
Figure 13.3: Example of HMI in the monitoring mode to use the PID controller
13.5 PID PARAMETER
Below are described in details the parameters related to the PID controller.
P0040 – PID Process Variable
Adjustable
Range:
0.0 to 3000.0 Factory
Setting:
Properties:
ro
Access Groups
via HMI:
READ
Description:
Read only parameter which presents in format (wxy.z), defined by P0529 and without engineering unit, the value
of the process variable or feedback of the PID controller according to the scale defined in P0528.
P0041 – PID Setpoint Value
Adjustable
Range:
0.0 to 3000.0
Factory
Setting:
Properties: ro
Access Groups
via HMI:
READ
Description:
Read only parameter which presents in format (wxy.z), defined by P0529 and without engineering unit, the value
of the setpoint (reference) of the PID controller according to the scale defined in P0528.
P0203 – Special Function Selection
Adjustable
Range:
0 = None
1 = PID via AI1
2 = PID via AI3
3 = PID via FI Factory
Setting:
0
Properties: cfg
Access Groups
via HMI:
Description:
It enables the special function PID Controller, when set P0203 ≠ 0. Besides, when you enable PID, you can select
the feedback input (measurement of the process variable) of the controller. The PID feedback can be done via
analog input (P0203 = 1 for AI1 or P0203 = 2 for AI3) or frequency input FI (P0203 = 3).