Automatic Restart - Siemens Sinamics S110 Function Manual

7.2.3

Automatic restart

Description
The "automatic restart" function is used to restart the drive automatically once the power has
been restored following 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.
If p1210 is set to value > 1, the motor can start automatically once the power supply has
been restored. This is especially critical if the motor comes to a standstill (zero speed) after
longer power failures and it is incorrectly assumed that it has been powered down. For this
reason, death, serious injury, or considerable material damage can occur if personnel enter
the working area of a motor in this condition.
Automatic restart mode
Table 7- 23
p1210 Mode
0 Disables automatic
restart
1 Acknowledges all faults
without restarting
4 Automatic restart after
line supply failure, no
additional start attempts
6 Restart after any fault
with additional start
attempts
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
WARNING
Automatic restart mode
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 + 1 s must expire between successful fault acknowledgment 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 acknowledgment 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).
If p1210 = 4, an automatic restart will only be performed if fault F30003 also
occurs on the Power Module or there is a HIGH signal at binector input p1208[1].
If additional faults are present, then these faults are also acknowledged and when
successfully acknowledged, the starting attempt is continued. When the 24 V
power supply of the CU fails, this is interrupted as a line supply failure.
When p1210 = 6, an automatic restart is carried out after any fault or when
p1208[0] = 1. If the faults occur one after the other, then the number of start
attempts is defined using p1211. Monitoring over time can be set using p1213.
Meaning
Drive functions
7.2 Basic functions
191