Siemens SIMOVERT Master Drives 6SE70 Betriebsanleitung Seite 318

Start-Up
P366 = 2 Restart after system recovery and pre-charging of the DC link after system recovery
While the system is down, the automatic controllers and firing pulses of the rectifier bridge are
inhibited. The common rectifier enters the status o 010. On power recovery, the unit is automatically
switched on again by the WEA. The DC link is re-charged.
The unit is only switched back on again if there is still an ON command (control word bit 0) active
following system recovery. The WEA function is therefore not possible with an ON command (control
word bit 0) programmed from the PMU or operator panel OP1S provided the external 24 V supply
does not fail.
IMPORTANT: External measures must be taken to guarantee safety on an automatic restart!
Warning A065 (Automatic restart active):
This warning bit is set following a system failure if the automatic restart function is active, and reset following a
restart by the WEA and completion of the pre-charging process.
The unit can also be switched off by a manual OFF command during this restart phase. Please also refer to
Chapter 7 "Faults and Warnings"
In the event of system failures when the WEA function has been activated (P366 = 2), the
unit may restart on system recovery and re-charge the DC link.
Consequently when the WEA function of the connected inverter has been activated
(P366 = 2 or P366 = 3) the inverter can be switched on once more.
Fatal injuries, severe bodily harm or damage to property and machinery may result if the
area surrounding the drive is entered while the drive is in this state.
If the kinetic buffering function (KIP) is activated on a connected converter from the series SIMOVERT Master
Drives 6SE70, on the common rectifier, P366=2 must be parameterized.
If two common rectifiers for 12-pulse mode are coupled via peer-to-peer protocol via the basic unit interface
SST2, the peer-to-peer telegram failure time monitoring must be switched off via P687.i003=0 on the "12-
pulse master" unit, otherwise the automatic switch-on with the parameterization P366=2 (on both units) will not
work correctly if the electronics supply voltage fails.
Note about "self-synchronous operation":
When the power section supply voltage fails, the common rectifier initially switches to so-called "self-
synchronous operation" for a period of up to about 1040 ms. Firing pulses are still output in the rectifying
direction during this period.
This ensures continuous rectifier operation on the two uninterrupted mains supply cables in the case of single-
pole supply voltage failures lasting up to 1040 ms minus P793 (1010 ms when P793 = 0.03 s).
The common rectifier does not exit the Run operating state until the "self-synchronous operation" period ends. It
then switches to operating state o 010 and behaves according to the setting in P366 after the DC link voltage
has dropped below the threshold P074 * 1.35 * P071.
4-44
ENGLISH
WARNING
NOTE
Siemens AG 6SE7087-6AK85-0AA0
Common Rectifier Operating Instructions
09.02