WEG CFW-11 Programming Manual page 251

Description:
It selects the regulator feedback input (process variable).
After choosing the feedback input, the function of the selected input must be programmed at P0231 (for AI1),
P0236 (for AI2), P0241 (for AI3) or P0246 (for AI4).
P0525 – Keypad PiD Setpoint
Adjustable 0.0 to 100.0 %
Range:
Proprieties:
Access groups 01 PARAMETER GROUPS
via HMI:
Description:
This parameter allows the setting of the PID Regulator setpoint through the HMI keys, provided that P0221=0
or P0222=0, and if it is operating in Automatic mode. In case it is operating in Manual mode, the reference via
keypad (HMI) is adjusted at the parameter P0121.
The value of P0525 is kept at the last adjusted value (backup) even disabling or removing power from the inverter
(with P0120=1 – Active).
P0527 – PiD action type
Adjustable 0 = Direct
Range: 1 = Reverse
Proprieties:
Access groups 01 PARAMETER GROUPS
via HMI:
Description:
The type of PID action must be selected as "Direct" when it is necessary that the motor speed be increased so that
the process variable be increased. Otherwise, "Reverse" must be selected.
That characteristic varies according to the process, but the direct action is more used.
In temperature or level control processes, the setting of the type of action will depend on the configuration. For
instance: at the level control, if the inverter acts on the motor that extracts fluid from the reservoir, the action will be
reverse, because when the level increases, the inverter must increase the motor speed so that it diminishes. In case the
inverter acts on the motor that puts fluid into the reservoir, the action will be direct.
P0528 – Process Variable Scale factor
Adjustable 1 to 9999
Range:
46 PID Regulator
46 PID Regulator
Table 20.4 - PID action selection
Motor Speed Process Variable
Increases
Select
Increases Direct
Diminishes Reverse
PID Regulator [46]
Factory 0.0 %
Setting:
Factory 0
Setting:
Factory 1000
Setting:
20-11
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