01/02 AWB8230-1415GB
Automatic restart after a fault
151
Automatic restart after a fault
With the default settings, each fault triggers a fault message. An
automatic restart is possible after the following fault messages
have occurred:
• Overcurrent (E01 to E04, up to four restart attempts within ten
minutes before a fault message is issued)
• Overvoltage (E07 and E15, up to three restart attempts within
ten minutes before a fault message is issued)
• Undervoltage (E09 and E16, up to 16 restart attempts within
ten minutes before a fault message is issued)
Under PNU b001, define the restarting behaviour.
With PNU b002 and b003, define the behaviour on failure of the
power supply (
a
Fig. 149 and Fig. 150).
Under PNU b004, define how the DV6 frequency inverter responds
to an intermittent power supply failure or undervoltage.
With PNU b005, define whether the DV6 frequency inverter
attempts a restart up to 16 times or indefinitely in the event of an
intermittent power supply failure or undervoltage.
With PNU b006, you can activate phase failure detection. This
function can not be used if an RFI filter is installed upstream of the
frequency inverter.
Under PNU b007, define the frequency threshold below which the
frequency inverter accelerates the motor from 0 Hz on a restart
Warning!
When a fault has occurred, this function initiates an auto-
matic restart of the frequency inverter if a start signal is
present after the set waiting time has expired. Make sure
that an automatic restart does not present a danger to
personnel.
Figure 149: Duration of power supply failure shorter than defined
under PNU b002
V
LN
:Supply voltage
V
2
:Output voltage
n
M
: Motor speed
t
0
: Duration of supply failure
a
Free run stop (coasting)
PNU b002
PNU b003
U
LN
U
2
n
M
t
O
a
Figure 150: Duration of power supply failure greater than defined
under PNU b002
V
LN
:Supply voltage
V
2
:Output voltage
n
M
: Motor speed
t
0
: Duration of supply failure
a
Free run stop (coasting)
PNU b002
U
LN
U
2
n
M
t
O
a
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