01/02 AWB8230-1415GB
Programmable digital inputs
1 to 8
97
Activating/deactivating PID control (PID)
Resetting PID and integral component (PIDC)
The digital input configured as PID is used for activating and deac-
tivating PID control. For a detailed description of the built-in PID
controller, see Section “PID controller“, Page 134. PID control can
be activated and deactivated through the PID input only if PID
control has been enabled by entering the value 1 under PNU A071
(
a
Section “PID control active/inactive“, Page 137). When the
PID input is activated, PID control is deactivated and the frequency
inverter works in “normal” frequency control mode.
The digital input configured as PIDC resets the integral component
of the PID control. When this input is activated, the integral
component is reset to zero.
X
Program one of the digital inputs 1 to 8 as PID by setting the
corresponding PNU (C001 to C008) to 23.
X
Program one of the digital inputs 1 to 8 as PIDC by setting the
corresponding PNU (C001 to C008) to 24.
h
The PID and PIDC inputs are optional. If you want to keep
PID control permanently active, you only need to set
PNU A071 to 1.
h
Do not switch PID control on and off while the frequency
inverter is in RUN mode (i.e. while the RUN lamp is lit).
h
Do not reset the integral component of the PID control
while the frequency inverter is in RUN mode (i.e. while the
RUN lamp is lit), since this could cause overcurrent trip-
ping.
Figure 91:
Digital input FW configured as FWD (start/stop clockwise),
1 as PID (activate/deactivate PID control) and 2 as PIDC
(reset integral component)
PIDC
FWD
PID
P24
FW
1
2
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