Vacon NX Series Applications Manual page 328

VACON · 328
1026 FREQUENCY INCREASE DELAY AFTER STOPPING AUXILIARY DRIVE 7 (2.9.22)
Use this parameter to set the delay time after which the frequency is increased after the
auxiliary drive is stopped.
If the speed of auxiliary drive increases slowly (e.g. in soft starter control) then a delay
between the start of auxiliary drive and the frequency drop of the variable speed drive will
make the control smoother. This delay can be adjusted with parameter ID1025.
In the same way, if the speed of the auxiliary drives decreases slowly a delay between the
auxiliary drive stop and the frequency increase of the variable speed drive can be
programmed with parameter ID1026.
If either of the values of parameters ID1025 and ID1026 is set to maximum (300.0 s) no
frequency drop nor increase takes place.
f
out
Start freq. of aux drive + 1 Hz
Start delay of aux.
drive (par. ID1010)
Aux. drive
control
Aux. drive
speed
Fig. 85: Frequency drop and increase delays
1027 AUTOCHANGE 7 (2.9.24)
Use this parameter to enable or disable the rotation of the start sequence and the priority of
motors.
9
Stop freq.
of aux drive - 1 Hz
Frequency drop
delay (par. ID1025)
Stop delay ofaux.
drive (par.ID1011)
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
PARAMETER DESCRIPTIONS
t
Frequency
increase
delay
(par. ID1026)