Moeller DV6-340 Series - Controller inhibit and coasting (free run stop - FRS)

01/02 AWB8230-1415GB
Programmable digital inputs
1to8
75
Controller inhibit and coasting (free run stop – FRS)
If you activate the digital input configured as FRS, the motor is
switched off and coasts to a stop (for example if an Emergency-
Stop is made). If you deactivate the FRS input, then, depending on
the inverter’s configuration, the frequency output is either
synchronized to the current speed of the coasting motor or restarts
at 0 Hz.
X Use PNU b088 to specify whether the motor is to restart at 0 Hz
after the FRS input has been deactivated, or if synchronization
should take place after a waiting time specified under
PNU b003. The frequency inverter recognizes the speed of the
rotor and starts only when the frequency set at PNU b007 is
reached.
X Program one of the digital inputs 1 to 8 as FRS by entering the
value 11 under the corresponding PNU (C001 to C008).
By default, FRS is assigned to digital input 4.
Figure 62: Configuration of digital input 3 as FRS (“free run stop”, =
controller inhibit) and FW as FWD (start/stop clockwise
operation)
FWD
FRS
P243FW
Figure 63: Function chart for FRS (control inhibit and free run stop)
n
M
:Motor speed
t
w
: Waiting time (setting under PNU b03)
a Motor coasts to a stop
b Synchronization to the current motor speed
c Restart from 0 Hz
FWD/REV
FRS
n
M
t
w
a
c
b
PNU Name Adjustable in RUN mode Value Function WE
Normal Extended
b003 Waiting time
until restart
– j 0.3 to 100 s Here, set a time which is to expire before an automatic
restart is initiated after a fault signal. This time can also be
used in conjunction with the FRS function. During the delay,
the following message appears on the LED display:
1.0
b007 Synchroniza-
tion frequency
– j 0 to 400 Hz Frequency at which a restart is initiated. 0.00
b088 Motor restart
after removal
of the FRS
signal
– j 00 0 Hz restart after deactivation of the FRS input 00
01 Synchronization of the motor to the frequency set under
PNU 007 after the waiting time set under PNU b003.
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