Automatic Restart - Siemens SINAMICS S120 Function Manual

6.10

Automatic restart

The automatic restart function is used to automatically restart the drive / drive line-up, e.g.
when the power is restored after a power failure. In this case, all of the faults present are
automatically acknowledged and the drive is powered-up again. This function is not only
restricted to line supply faults; it can also be used to automatically acknowledge faults and to
restart the motor after any fault trips. In order to allow the drive to be powered-up while the
motor shaft is still rotating, the "flying restart" function should be activated using p1200.
Before the automatic restart starts, it should be ensured that the supply voltage is available
and is present at the infeed.
On this subject, also note the information in Section Infeed switch on by a drive (Page 815).
Note
Automatic restart functions in servo control and vector control and for infeeds with infeed
control. After the line supply voltage is connected, Smart Line Modules 5kW/10kW
automatically power themselves up.
Automatic start of the motors with incorrect parameterization
If p1210 is set to the value > 1, the Line Module / motors can start automatically once the
line supply has been re-established. This is especially critical if, after longer line supply
failures, motors come to a standstill (zero speed) and it is incorrectly assumed that they
have been powered-down.
Do not enter the working area of the motors.
Automatic restart mode
Table 6- 7 Automatic restart mode
p1210 Mode
0 Disables automatic restart
1 Acknowledges all faults without
restarting
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
WARNING
Meaning
Automatic restart inactive
Any faults that are present, are acknowledged automatically once the
cause has been rectified. If further faults occur after faults have been
acknowledged, then these are also again automatically acknowledged.
A minimum time of p1212 + 1s must expire between successful fault
acknowledgement and a fault re-occurring if the signal ON/OFF1
(control word 1, bit 0) is at a HIGH signal level. If the ON/OFF1 signal
is at a LOW signal level, the time between a successful fault
acknowledgement and a new fault must be at least 1s.
For p1210 = 1, fault F07320 is not generated if the acknowledge
attempt failed (e.g. because the faults occurred too frequently).
Basic functions
6.10 Automatic restart
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