120 ACS 400 User’s Manual
8112 LOW FREQ 1
Sets a frequency limit (see Figure 50). When the ACS 400’s output frequency falls below the value (8112
LOW FREQ 1 - 1 Hz) and one auxiliary motor is running, the Stop Delay counter is started. When the time set
with parameter 8116
AUX MOT STOP D. is elapsed and if the output frequency is still below the value (8112
LOW FREQ 1 + 1 Hz), the first auxiliary motor is stopped.
After the auxiliary motor is stopped, the ACS 400’s output frequency is increased by the value (8109
START
FREQ 1 - 8112 LOW FREQ 1).
Note! Low Frequency 1 should be within limits 2007
MINIMUM FREQ +1 and 8109 START FREQ 1.
8113 LOW FREQ 2
Sets a frequency limit (see Figure 50). When the ACS 400’s output frequency falls below the value (8113
LOW FREQ 2 - 1 Hz) and two auxiliary motors are running, the Stop Delay counter is started. When the time
set with parameter 8116
AUX MOT STOP D. is elapsed and if the output frequency is still below value (8113
LOW FREQ 2 + 1 Hz), the second auxiliary motor is stopped.
After the auxiliary motor is stopped, the ACS 400’s output frequency is increased by a value (8110
START
FREQ 2 - 8113 LOW FREQ 2).
Note! Low Frequency 2 should be within limits 2007
MINIMUM FREQ +1 and 8109 START FREQ 2
8114 LOW FREQ 3
Sets a frequency limit (see Figure 50). When the ACS 400’s output frequency falls below a value (8114
LOW
FREQ 3 - 1 Hz) and three auxiliary motors are running a Stop Delay counter is started. When the time set
with parameter 8116
AUX MOT STOP D. is elapsed and if the output frequency is still below the value (8114
LOW FREQ 3 + 1 Hz), the third auxiliary motor is stopped.
After the auxiliary motor is stopped, ACS 400 output frequency is increased by value (8111
START FREQ 3 -
8114
LOW FREQ 3).
Note! Low Frequency 3 should be within limits 2007
MINIMUM FREQ +1 and 8109 START FREQ 3.
8115 AUX MOT START D
Sets the Start Delay for the auxiliary motors. See parameter 8112
LOW FREQ 1 and Figure 50 for more
information.
8116 AUX MOT STOP D.
Sets the Stop Delay for the auxiliary motors. See parameter 8112
LOW FREQ 1 for more information.
Figure 50 Start Frequency, Low Frequency, Start Delay and Stop Delay.
Code Description
Frequency
f
min
Start
Stop
Aux Motor 1
Stop/Start
Time
8109 START FREQ 1 + 1 Hz
8112
LOW FREQ 1 - 1 Hz
f
max
Frequency in-
crease during
the Start Delay
Frequency de-
crease during
the Stop Delay
8116 AUX MOT STOP D.
8115 AUX MOT START D
Increasing
flow
Decreasing
flow
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