WEG CFW700 User Manual - page 43

38 | CFW700

Keypad (HMI) and Basic Programming 

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P1028 – PID Output N = 0 

Adjustable 

Range:

0.0 to 100.0 %

Factory 

Setting:

0.0 %

Properties:

-

Access Groups 

via HMI:

SPLC

Description:

The P1028 parameter works together with the P0218 parameter (Condition to Leave the 

Zero Speed Disable), providing additional requirement for leaving the condition. Thus, it is 

necessary that the error of the PID controller (the difference between the control setpoint 

and process variable) is greater than the value programmed in P1028 for the inverter to 

operate the motor again, this state is known as “wake up”.

P1031 – X Process Variable Value 

P1032 – Y Process Variable Value

Adjustable 

Range:

0.0 to 100.0 %

Factory 

Setting:

P1031 = 90.0 %

P1032 = 10.0 %

Properties:

-

Access Groups 

via HMI:

SPLC

Description:

These parameters are used at the digital outputs functions for signaling/alarm, and will show:

Process Variable > VPx (Function 1 of the Application) and

Process Variable

4.2.2 Electronic Potentiometer (EP) Application 

The CFW700 has the Electronic Potentiometer (E.P.) function that allows the speed reference to 

be adjusted via two digital inputs, one for accelerating and another for decelerating the motor.

With the inverter enabled and the DIx digital input set to “Function 1 of the Application 

(Accelerate)” activated, the motor is accelerated according to the programmed acceleration 

ramp up to the maximum speed. If only the DIx digital input set to “Function 2 of the Application 

(Decelerate)” is active and the inverter is enabled, the motor speed is decreased according to 

the programmed deceleration ramp up to minimum speed. If both inputs are active, the motor 

will decelerate for safety reasons. With the inverter disabled, DIx digital inputs are ignored unless 

both are active, which the speed reference is set to 0 rpm. The following figure illustrates this 

condition.