ABB RDNA-01 Bedienungsanleitung Seite 178

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Seitenansicht 177
1-174 ACH550-UH User’s Manual
Parameters
8112 LOW FREQ 1 0.0…500.0 Hz 0.1 Hz 30.0 Hz (US)
Sets the frequency limit used to stop the first auxiliary motor. The first auxiliary motor stops if:
Only one (the first) auxiliary motor is running.
ACH550 output frequency drops below the limit:
8112 - 1.
Output frequency stays below the relaxed limit
(8112 + 1 Hz) for at least the time: 8116
AUX MOT STOP D.
After the first auxiliary motor stops:
Output frequency increases by the value =
(8109 START FREQ 1) - (8112 LOW FREQ 1).
In effect, the output of the speed regulated motor increases to
compensate for the loss of the auxiliary motor.
See the figure, where:
A = (8109
START FREQ 1) - (8112 LOW FREQ 1)
B = Output frequency decrease during the stop delay.
C = Diagram showing auxiliary motors run status as
frequency decreases (1 = On).
Grey path = Shows hysteresis – if time is reversed, the path
backwards is not the same. For details on the path for
starting, see the diagram at 8109
START FREQ 1.
Note: 8112
LOW FREQ 1 value must be between:
(2007
MINIMUM FREQ) +1.
8109
START FREQ 1
8113 LOW FREQ 2 0.0…500.0 Hz 0.1 Hz 30.0 Hz (US)
Sets the frequency limit used to stop the second auxiliary motor.
See 8112
LOW FREQ 1 for a complete description of the operation.
The second auxiliary motor stops if:
Two auxiliary motors are running.
ACH550 output frequency drops below the limit: 8113 - 1.
Output frequency stays below the relaxed limit (8113 + 1 Hz) for at least the time: 8116
AUX MOT STOP D.
8114 LOW FREQ 3 0.0…500.0 Hz 0.1 Hz 30.0 Hz (US)
Sets the frequency limit used to stop the third auxiliary motor.
See 8112
LOW FREQ 1 for a complete description of the operation.
The third auxiliary motor stops if:
Three auxiliary motors are running.
ACH550 output frequency drops below the limit: 8114 - 1.
Output frequency stays below the relaxed limit (8114 + 1 Hz) for at least the time: 8116
AUX MOT STOP D.
8115 AUX MOT START D 0.0…3600.0 s 0.1 s 5.0 s
Sets the Start Delay for the auxiliary motors.
The output frequency must remain above the start frequency limit (parameter 8109, 8110, or 8111) for this time
period before the auxiliary motor starts.
See 8109
START FREQ 1 for a complete description of the operation.
8116 AUX MOT STOP D 0.0…3600.0 s 0.1 s 3.0 s
Sets the Stop Delay for the auxiliary motors.
The output frequency must remain below the low frequency limit (parameter 8112, 8113, or 8114) for this time
period before the auxiliary motor stops.
See 8112
LOW FREQ 1 for a complete description of the operation.
Group 81: PFA Control
Code Description Range Resolution Default S
t
t
f (Hz)
f
MIN
f
MAX
P 8116
(P 8112)-1
B
1
0
C
P 8112
P 8109
A
A
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