Vacon 100 hvac Applications Manual page 160

VACON · 160
M1
M2
Fig. 40: The Multipump function
If the PID controller cannot keep the feedback in the set bandwidth, a motor or motors are
connected or disconnected.
When to connect and/or add motors:
The feedback value is not in the bandwidth area.
•
The regulating motor operates at a close to maximum frequency (-2 Hz).
•
The conditions above are true for longer than the bandwidth delay.
•
There are more motors available
•
When to disconnect and/or remove motors:
The feedback value is not in the bandwidth area.
•
The regulating motor operates at a close to minimum frequency (+2 Hz).
•
The conditions above are true for longer than the bandwidth delay.
•
There are more motors that operate than the regulating one.
•
P3.14.2 INTERLOCK FUNCTION (ID 1032)
The interlocks tell the Multipump system that a motor is not available. This can occur when
the motor is removed from the system for maintenance or bypassed for manual control.
To use the interlocks, enable the parameter P3.14.2. Make a selection of the status for each
motor with a digital input (the parameters from P3.5.1.25 to P3.5.1.28). If the value of the
input is CLOSED, that is, active, the motor is available for the Multipump system. If not, the
Multipump logic will not connect it.
9
Bandwidth Setpoint
Feedback
Delay
Drive is running at maximum
or close to maximum frequency
TEL. +358 (0)201 2121 · FAX +358 (0)201 212 205
PARAMETER DESCRIPTIONS
ON
OFF
ON
OFF