Vacon CX - Page 49

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Pump control with autochange
9. 20 PI-regulator bypass
With this parameter the PI-regulator can be programmed to be bypassed. Then the
frequency of the drive controlled by the frequency converter and the starting points
of the auxiliary drives are defined according to the actual value signal.
Minimum freq.
(par. 1.1)
Minimum of the
actual value
Output freq.
Actual value
Maximum of the
actual value
Start freq. of the aux. drive 1
(par.9.2)
Max. freq.
(par. 1.2)
Stop freq. of the aux.
drive 1 (par.9.3)
Stop freq. of the aux.
drive 2 (par.9.5)
Start/stop control of
the freq. converter
Auxiliary drive 1
stop
start
stop
start
stop
start
Start freq. of the aux. drive 2
(par.9.4)
Auxiliary drive 2
Figure 6-29 Example of the function of variable speed drive and two auxiliary
drives when PI-regulator is bypassed with parameter 9. 20.