38 | CFW700
Keypad (HMI) and Basic Programming
English
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 < 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.
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