ABB ACH 501 - Page 95

Chapter 6 – Parameters
ACH 500 Programming Manual 6-49
7 SLEEP LEVEL 0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Level to start sleep delay counter.
8 WAKE UP LEVEL 0 – 100%
Level in % of the set reference range. This parameter determines the level of
the actual value at which the ACH 500 will restart.
9 START FREQ 1 0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Output frequency at which the first lag motor will start. The start frequency
has a fixed 1 Hz hysteresis.
Figure 6-22 Pump Automation Example
10 START FREQ 2 Same functionality as Parameter 40.2.9 (Start Freq 1) except for second lag
motor.
11 START FREQ 2 Same functionality as Parameter 40.2.9 (Start Freq 1) except for third lag
motor.
12 LOW FREQ 1 0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Output frequency that the ACH 500 will go to after the first lag motor is
started. If the output frequency goes below this limit by 1 Hz, the lag motor
will stop.
Frequency
f
max
f
min
Start Limit 1
(Param 40.2.9 + 1Hz)
Low Freq Limit 1
(Param 40.2.12 - 1Hz)
Aux. Motor 1
STOP/START
START
STOP
Flow
Increasing Flow
Decreasing Flow
Stop Delay (40.2.16)
Start Delay (40.2.15)
Frequency Increasing
During the Start Delay
Frequency Decreasing
During the Stop Delay