Automatic Restart (Vector, Servo, Infeed) - Siemens SINAMICS S120 Function Manual

Basic functions

6.8 Automatic restart (vector, servo, infeed)

6.8 Automatic restart (vector, servo, infeed)
Description
The automatic restart function is used to automatically restart the drive/drive group 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.
CAUTION
Automatic restart functions in the vector, servo mode and for infeeds with closed-loop
infeed control. After the line supply voltage is connected, Smart Line Modules 5kW/10kW
automatically power themselves up.
If p1210 is set to the value > 1, the Line Modules / 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. For this reason, entering the area around the drive when it is in
this condition can cause death, serious injury, or considerable material damage.
Automatic restart mode
Table 6- 6
0
1
208
WARNING
Automatic restart mode
p1210 Mode
Disables automatic restart
Acknowledges all faults without
restarting
Meaning
Automatic restart inactive
When p1210 = 1, faults that are present are
acknowledged automatically when their cause is
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).
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions