Firmware Manual

9000X AF Drives
MN04004001E
For more information visit: www.eaton.com
8-81
August 2010
Description of Parameters
Figure 8-60: Frequency Drop and Increase Delays
1025 Frequency drop delay after
starting auxiliary drive
7 (P1.9.21)
1026 Frequency increase delay after
stopping auxiliary drive
7 (P1.9.22)
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 adjustable
frequency drive will make the control smoother. This delay can be adjusted with
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 adjustable frequency drive
can be programmed with ID1026. See Figure 8-60.
If either of the values of ID1025 or ID1026 is set to maximum (300.0 s) no frequency
drop nor increase takes place.
1027 Autochange 7 (P1.9.24)
0 Autochange not used
1 Autochange used
Output
Frequency
Start Freq. of
Aux Drive + 1 Hz
Stop Freq. of
Aux Drive – 1 Hz
Start Delay of
Aux. Drive
(ID1010)
Aux. Drive
Control
Frequency
Drop Delay
(ID1025)
Frequency
Increase Delay
(ID1026)
Stop Delay
of Aux. Drive
(ID1011)
Time
Aux. Drive
Speed