Danfoss VACON 100 FLOW Series Application Manual page 38

VACON® 100 FLOW
Application Guide
The drive is connected to 1 of the motors, which becomes the regulating motor. The internal PID controller of the drive controls the
speed of the regulating motor and gives control signals by relay outputs to start or stop the auxiliary motors. External contactors
(switch) set the auxiliary motors to the mains.
It is possible to control a process variable, the pressure, for example, by the control of the speed of the regulating motor and by the
number of motors that operate.
3
A
RO2
RO3
M1
Illustration 10: Multi-pump (Single Drive) Configuration
A Start / Stop
B Pressure sensor
Autochange function (change of start order) makes the wear of the motors in the system more equal. Autochange function moni-
tors the running hours and sets the start order of each motor. The motor that has the lowest running hours starts first and the motor
that has the highest running hours starts last. It is possible to configure the autochange to start based on the autochange interval
time set by the internal real-time clock (an RTC battery needed) of the drive.
It is possible to configure the autochange for all the motors in the system or only the auxiliary motors.
38 | Danfoss A/S © 2023.08
M2
M1
B
M2
M3
M3
Applications
AB298035655957en-000201 / DPD01083