ABB ACH550-02-645A-4 [312/454] Parameter listing and descriptions

ABB ACH550-02-645A-4 [312/454] Parameter listing and descriptions
308 Parameter listing and descriptions
ACH550-02 User's Manual
8111 START FREQ 3 0.0…500 Hz
Sets the frequency limit used to start the third auxiliary motor.
See 8109
START FREQ 1 for a complete description of the operation.
The third auxiliary motor starts if:
two auxiliary motors are running.
ACH550 output frequency exceeds the limit 8111 + 1 Hz.
output frequency stays above the relaxed limit (8111 - 1 Hz) for at
least the time 8115
AUX MOT START D.
8112 LOW FREQ 1 0.0…500 Hz
Sets the frequency limit used to stop the first auxiliary motor. The first
auxiliary motor stops if:
the first auxiliary
motor is running
alone.
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 figure, where:
A = (8109
START FREQ 1) - (8112 LOW FREQ 1)
B = Output frequency decrease during the stop delay.
C = Diagram showing auxiliary motor’s 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 and 8109 START FREQ 1
Code Description Range
P 8116
(P 8112)-1
B
f (Hz)
f
MAX
f
MIN
1
0
C
P 8112
P 8109
A
A
t
t

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