WEG CFW300 V1.3X, Programming Manual

Page: 155 / 157

SoftPLC
CFW300 | 18-17
18
P935 – Filter for the PID Controller Control Setpoint
Adjustable
Range:
0.000 to 9.999 s
Factory
Setting:
0.150
Properties:
Description:
This parameter configures the time constant of the 1st order filter to be applied to the PID controller control
setpoint, and it is intended to reduce sudden changes in the control setpoint value of the PID controller.
18.2.3.1 Sleep Mode
This parameter group allows the user to set the operation conditions of the sleep mode.
Sleep Mode is a controlled system state in which the control demand is zero or almost zero, and, at this moment,
the motor driven by the CFW300 frequency inverter may be switched off. That prevents the motor from running
at a low speed, doing little or nothing for the controlled system. Even if the motor is apparently OFF, the process
variable continues to be monitored so that, when necessary, the controlled system can start the motor again
according to the conditions of the wake up mode.
The Wake Up Mode switches on the motor when the difference between the control process variable and the
control setpoint is greater than a certain programmed value.
NOTE!
The sleep mode only actuates if the PID controller is enabled and in the automatic mode.
DANGER!
When the CFW300 inverter is in the sleep mode, the motor may spin at any moment because of
the process conditions. If you wish to handle the motor or execute any kind of maintenance, power
down the inverter.
P936 – Process Variable Deviation to Wake up
Adjustable
Range:
-99.99 a 99.99 [SoftPLC Eng. Un.] Factory
Setting:
0.30
Properties:
Description:
This parameter defines the value to be subtracted from (direct PID) or added to (reverse PID) the control setpoint
to start the motor and return to the system control. This value is compared to the control process variable, and,
if the control process variable value is smaller (direct PID) or greater (reverse PID) than this value, the wake up
condition is enabled.
NOTE!
This parameter will be viewed according to the selection of the parameters for the SoftPLC engineering
unit (P510 and P511).