WEG CFW-11 Programming Manual page 245

If it is wished to change the indication of the process variable on the keypad (HMI), the parameters P0528 and
P0529 must be adjusted according to the transducer full scale and to the defined P0237 value (Refer to the
description of those parameters at the section 20.6). The parameters P0530 to P0532 can be configured to
set the process variable engineering unit.
Example: If a reading of "25.0 bar" is wished for the motor maximum speed, set:
– P0528=250;
– P0529=1 (wxy.z);
– P0530="b";
– P0531="a";
– P0532="r".
5) To set the reference (setpoint): to define the operation mode (local/remote) at the parameter P0220 and
the reference source at parameters P0221 and P0222, according to the desired situation.
In case the setpoint is defined via keypad (HMI), set P0525 according to the equation below:
Setpoint (%) =
Example: Given a pressure transducer with a 4 to 20 mA output and a full scale of 25 bar (i.e., 4 mA=0 bar
and 20 mA=25 bar) and P0237=2.000. If it is wished to control 10 bar, the following setpoint must
be entered:
In case the setpoint is defined via analog input (AI1 for instance), P0231 must be configured=0 (AI1 Signal
Function: Speed reference) and P0233 (AI1 Signal Type) according to the type of signal to be read by the input
(if current or voltage).
Do not program P0221 and/or P0222=7 (E.P .).
6) To set the speed limits: Adjust P0133 and P0134 according to the application.
The readings exhibited automatically when the inverter is powered are:
- Reading 1 – P0041 "PID Setpoint";
- Reading 2 – P0040 "Process Variable";
- Reading 3 – P0002 "Motor Speed".
7) Indication: Refer to the section 5 in this manual.
Those variables can also be visualized at the analog outputs (AOx), provided that the parameters that define
the function of those outputs be programmed accordingly.
Desired value (process variable)
Sensor full scale value
10
x 2 x 100 % = 80 %
Setpoint (%) =
25
PID Regulator [46]
feedback
x x 100 %
gain
20
20-5