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

198 Description of Parameters Honeywell
1029 Autochange interval 7 (2.9.26)
After the expiry of the time defined with this parameter, the autochange function takes
place if the capacity used lies below the level defined with parameters 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 8-64.
1030 Maximum number of auxiliary drives 7 (2.9.27)
1031 Autochange frequency limit 7 (2.9.28)
These parameters define the level below which the capacity used must remain so that
the autochange can take place.
This level is defined as follows:
• If the number of running auxiliary drives is smaller than the value of parameter
ID1030 the autochange function can take place.
• If the number of running auxiliary drives is equal to the value of parameter ID1030
and the frequency of the controlled drive is below the value of parameter ID1031 the
autochange can take place.
• If the value of parameter ID1031 is 0.0 Hz, the autochange can take place only in
rest position (Stop and Sleep) regardless of the value of parameter ID1030.
Output
frequency
Par. ID1030 = 1
Max.number of
auxiliary drives
Autochange moment
Par. ID1031
Autochange
level, frequency
Time
Par. ID1029
Autochange interval
Par. ID1029
Autochange interval
Aux. drive 1
control
Aux. drive 2
control
Figure 8-64. Autochange interval and limits
NX12k98.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