NXS Form 63-2600, Users Manual, Technical Data - CONTROL ...

196 Description of Parameters Honeywell
1025 Frequency drop delay after starting auxiliary drive 7 (2.9.21)
1026 Frequency increase delay after stopping auxiliary drive 7 (2.9.22)
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. See Figure 8-61.
If either of the values of parameters ID1025 and ID1026 is set to maximum (300,0 s) no
frequency drop nor increase takes place.
Output frequency
Start freq. of aux drive + 1 Hz
Stop freq. of aux drive - 1 Hz
Time
Aux. drive
control
Start delay of
aux. drive (par. ID1010)
Frequency drop delay
(par. ID1025)
Stop delay of
aux. drive (par.
ID1011)
Frequency increase
delay (par. ID1026)
Aux. drive
speed
Figure 8-61. Frequency drop and increase delays
1027 Autochange 7 (2.9.24)
0 Autochange not used
1 Autochange used
NX12k94.fh3
Automation and Control Solutions
Honeywell
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MIN 55422 Scarborough, Ontario 63-2600-1
MIV 4Z9
www.honeywell.com