P3.14.1.3 OUTPUT IN STOP (ID 1100)
Use this parameter to set the output value of the PID controller as a percentage of its
maximum output value when it is stopped from a digital output.
If the value of this parameter is set to 100%, a 10% change in the error value causes a 10%
change in the controller output.
10.16
MULTI-PUMP FUNCTION
The Multi-pump function lets you control a maximum of 6 motors, pumps or fans with the
PID controller.
The AC drive is connected to a motor, which is the regulating motor. The regulating motor
connects and disconnects the other motors to/from the mains with relays. This is done to
keep the right setpoint. The Autochange function controls the sequence in which the motors
start to make sure that they wear equally. You can include the regulating motor in the
autochange and interlock logic, or set it to always be Motor 1. It is possible to remove motors
momentarily with the Interlock function, for example for maintenance.
M1
M2
A
B
C
D
E
G
F
E
F
Fig. 80: The Multi-pump function
A. Bandwidth
B. Setpoint
C. Feedback
D. Delay
E. ON
F. OFF
G. Drive is running at maximum or close to
maximum frequency
If the PID controller cannot keep the feedback in the set bandwidth, a motor or motors are
connected or disconnected.
VACON · 308
PARAMETER DESCRIPTIONS
10
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