ABB +N5600 Firmware Instructions page 44

44 ESP program features
Control
scenario
5 Drive stops measuring the actual pump-motor speed if Start command
if OFF when parameter
counting.
6 Parameter
restart delay time is elapsed, the speed measurement function starts
automatically.
2-3, 7-8, The time needed for the Backspin speed observer function to detect
13-14 the actual motor speed is defined with parameter
delay.
7-9 When Backspin speed observer is active, the drive start command will
have no effect until measured speed gets in to the safe-to-restart speed
region defined with parameters
Restart speed limit
9-11 The speed observer function will trigger the speed check timer set in
parameter
speed is within the safe-to-restart speed region.
10 If the measured speed is outside safe-to-restart speed region, then the
speed check timer will reset.
If the measured speed is within the safe-to-restart speed region defined
11-12
in parameter
observer function routine is over. The drive stops modulating and
parameter
In case user drive start command is active, then immediately after
speed check time is elapsed the flying start sequence is initiated and
drive takes control over the pump-motor to go over the starting routines
and then accelerate it to the production speed.
The drive is waiting for the user to initiate the drive start command.
12-13
As soon as the user drive start command is given, the drive repeats
13-14
speed measurement routine to ensure that the actual speed is within
the safe-to-restart speed region, then the drive will proceed to the
normal starting routine without any speed check time delay.
If the speed is outside the safe-to-restart speed region, then all the
speed supervision procedure is repeated from point 8.
The drive gets in to normal production state through the starting
14-15
routines.
Description
09.41 Restart delay remaining
74.30 Speed observer enable
high.
74.33 Observer speed check time
74.33 Observer speed check
74.99 ESP start/stop
is set ON, so that when
74.31 Restart speed limit low
when the measured
time, then the speed
sw, bit 8 is set to TRUE.
timer is still
74.39 Measurement
and 74.32