ABB ACS880 Series, Руководство по прошивке

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Def / Type
FbEq 16b / 32b Description Name / Range /
Selection No.
5 s / real32 Defines the period between previous sample and actual
sample of cos phi values used to detect the sync loss
condition.
The below block diagram shows the control logic for a
sample memory area of 10 samples.
If the sample period is set as
• 1 second, the first sample is compared after 1
second, and the next samples are compared after
100 ms.
• 10 seconds, the first sample is compared after 10
seconds, and the next samples are compared after
1 second.
• 120 seconds, the first sample is compared after
120 seconds, and the next samples are compared
after 12 seconds.
Sync loss sample
period 31.203
1 = 1 s / 1 = 1 s Sync loss sample period. 0...120 s
0.5 s / real32 Defines the filter time for signal
1.25 INU momentary
cos φ used for sync loss supervision function.
Sync loss cos phi
filter time 31.204
10 = 1 s / 1 = 1 s Filter time. 0.0 ... 120.0 s
50.0% / real32 Defines the cos phi drop limit for the Sync loss
supervision function.
If the drop from previous to actual cos phi samples is
equal to or larger than the limit, the Sync loss condition
occurs. Note that the function detects a sync loss
condition only if the drive output frequency is above
the minimum detection limit (
31.202 Sync loss minimum
detection limit ).
The motor is not in synchronization condition, when:
Previous cos phi sample - Actual cos phi sample ≤
Previous cos phi sample * p.31.205/100
Sync loss cos phi
drop 31.205
10 = 1% / 1 = 1% Synchronization loss cos phi drop in percent. 0.0 ... 100.0%
0.30 / real32 Defines the minimum level of actual cos phi below
which motor is out of synchronization. Sync loss cos phi
minimum level 31.206
100 = 1 / 1 = 1 Synchronization loss cos phi minimum level. 0.00 ... 1.00
Parameters 379