ABB ACH550-01, Руководство пользователя

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292 Parameter listing and descriptions
ACH550 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: Low Frequency 1 value must be between:
• (2007
MINIMUM FREQ
) +1 and 8109
START FREQ
1
Code Description Range
t
P 8116
(P 8112)-1
B
f (Hz)
f
MAX
f
MIN
t
1
0
C
P 8112
P 8109
A
A