Actual signals and parameters 267
8111 START FREQ
3
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
• drive output frequency exceeds limit 8111 + 1 Hz
• output frequency stays above the relaxed limit (8111 -
1 Hz) for at least time 8115 AUX MOT START D.
E: 50.0 Hz
U: 60.0 Hz
0.0…500.0 Hz Frequency 1 = 0.1 Hz
8112 LOW FREQ 1 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
• drive output frequency drops below limit 8112 - 1 Hz.
• output frequency stays below the relaxed limit (8112 +
1 Hz) for at least time: 8116 AUX MOT STOP D.
After the first auxiliary motor stops, output frequency
increases by 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.
E: 25.0 Hz
U: 30.0 Hz
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 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 H
Z and 8109 START FREQ 1
0.0…500.0 Hz Frequency 1 = 0.1 Hz
All parameters
No. Name/Value Description Def/FbEq
B
1
0
C
A
A
8112
(8112)-1
8109
f (Hz)
f
MIN
f
MAX
8116
t
t
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