Firmware Manual

9000X AF Drives
MN04004001E
For more information visit: www.eaton.com
8-83
August 2010
Description of Parameters
Figure 8-63: Autochange Interval and Limits
1029 Autochange interval 7 (P1.9.26)
After the expiration of the time defined with this parameter, the autochange function
takes place if the capacity used lies below the level defined with ID1031 (Autochange
frequency limit) and ID1030 (Maximum number of auxiliary drives). Should the
capacity exceed the value of ID1031, the autochange will not take place before the
capacity goes below this limit.
• The time count is activated only if the Start/Stop request is active.
• The time count is reset after the autochange has taken place.
See Figure 8-63.
1030 Maximum number of auxiliary
drives
7 (P1.9.27)
1031 Autochange frequency limit 7 (P1.9.28)
These parameters define the level below which the capacity used must remain for
autochange to take place.
This level is defined as follows:
• If the number of running auxiliary drives is smaller than the value of ID1030 the
autochange function can take place.
• If the number of running auxiliary drives is equal to the value of ID1030 and the
frequency of the controlled drive is below the value of ID1031 the autochange can
take place.
• If the value of ID1031 is 0.0 Hz, the autochange can take place only in rest position
(Stop and Sleep) regardless of the value of ID1030.
ID1030
=
1
Max. Number of
Auxiliary Drives
Autochange
Moment
Aux. Drive
2 Control
Output
Frequency
Time
Aux. Drive
1 Control
ID1029
Autochange Interval
ID1031
Autochange
Level,
Frequency
ID1029
Autochange Interval