Actual signals and parameters 267
8111 START FREQ
3
Sets the frequency limit used to start the third auxiliary
motor. See
for a complete description
of the operation.
The third auxiliary motor starts if:
• two auxiliary motors are running
• drive output frequency exceeds limit
+ 1 Hz
• output frequency stays above the relaxed limit (
1 Hz) for at least time
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
- 1 Hz.
• output frequency stays below the relaxed limit (
+
1 Hz) for at least time:
.
After the first auxiliary motor stops, output frequency
increases by value (
) - (
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 = (
) - (
)
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
.
Note:
value must be between
) + 1 H
Z
and
0.0…500.0 Hz
Frequency
1 = 0.1 Hz
All parameters
No.
Name/Value
Description
Def/FbEq
B
1
0
C
A
A
)-1
f
(Hz)
f
MIN
f
MAX
t
t
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Industry Automation
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