Electronic Potentiometer (Ep) Application - WEG CFW700 Serie Manual Del Usuario

Keypad (HMI) and Basic Programming
P1028 – PID Output N = 0
Adjustable 0.0 to 100.0 %
Range:
Properties: -
Access groups SPLC
via HMI:
Description:
The parameter P1028 works together with the parameter P0218 (Condition to Leave the
Zero Speed Disable), providing additional requirement to leave the disable condition. Thus,
it is necessary that the error of the PID (the difference between the 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 0.0 to 100.0 %
Range:
Properties: -
Access groups SPLC
via HMI:
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 < VPy (Function 2 of the Application).

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.
36 | CFW700
Factory
Setting:
Factory
Setting:
- English -
0.0 %
P1031 = 90.0 %
P1032 = 10.0 %