Siemens SINAMICS S120 Function Manual page 198

Extended Functions
Automatic restart (vector, infeed)
Starting attempts (p1211) and waiting time (p1212)
p1211 is used to specify the number of starting attempts. The number is internally
decremented after each successful fault acknowledgement (line supply voltage
must be re-applied or the infeed signals that it is ready. Fault F07320 is output if
the number of parameterized start attempts has been reached.
When 1211 = x, x + 1 starting attempts are made.
Note
A start attempt immediately starts when the fault occurs.
The faults are automatically acknowledged in intervals of half the waiting time
p1212.
After successfully acknowledgment and the voltage returns, then the system is
automatically powered-up again.
The start attempt has been successfully completed if the flying restart and the mo-
tor magnetization (induction motor) has been completed (r0056.4 = 1) and one ad-
ditional second has expired. The starting counter is only reset back to the initial
value p1211 after this time.
If additional faults occur between successful acknowledgement and the end of the
starting attempt, then the starting counter, when it is acknowledged, is also decre-
mented.
Monitoring time line supply return (p1213)
The monitoring time starts when the faults are detected. If the automatic acknow-
ledgements are not successful, the monitoring time runs again. If the drive has not
successfully started again after the monitoring time has expired (flying restart and
motor magnetization must have been completed: r0056.4 = 1), fault F07320 is out-
put. The monitoring is de-activated with p1213 = 0. If p1213 is set lower than the
sum of p1212, the magnetization time r0346 and the additional delay time due to
flying restart, then fault F07320 is generated at each restart. If, for p1210 = 1, the
time in p1213 is set lower than p1212, then fault F07320 is also generated at every
restart attempt. The monitoring time must be extended if the faults that occur can-
not be immediately and successfully acknowledged (e.g. when faults are perma-
nently present).
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© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition