09.02 Connection
Siemens AG 6SE7087-6AK85-1AA0
3-59
Rectifier/Regenerating Unit Operating instructions
♦ Circuit identification:
Circuit identification should be carried out successively
on the 12-pulse master and on the 12-pulse slave.
P052= 21 must be set on each unit for this purpose, and the switch-on command for the 12-pulse slave
comes from the 12-pulse master (the control word wiring ensures that the partner unit, in each case, does
not carry current or is held in the operating state r000= "--".
• Circuit identification procedure for 12-pulse master:
Set P052= 21 on the 12-pulse master unit, switch on ⇒ circuit identification is carried out on the 12-pulse
master
• Circuit identification procedure for 12-pulse slave:
Set P052= 21 on the 12-pulse slave
unit, switch on the 12-pulse master unit ⇒ circuit identification is
carried out on the 12-pulse slave
Note
: If circuit identification is carried out with the basic settings selected (operation as a 12-pulse slave,
all control is from the 12-pulse master), the switch-on command must come from the 12-pulse master and
the power terminals
of the 12-pulse master unit must be connected to the supply voltage.
Note
: When the reserve setting is selected on the 12-pulse slave unit (with appropriate parameterization
of index i002 of the "Source selection parameters" P554, P555, ...) it is also possible to issue the switch-
on command for circuit identification on the slave unit on-site via the PMU or OP1S.
♦ Setting additional functions:
If required, activate the "auto restart" (via P366= 2) on the master and
on the slave unit. This will be effective
in the event of failure of the electronics supply voltage provided that the Peer-to-Peer telegram failure
monitoring time has been switched off via P687.i003= 0.
3.8.6 Redundancy mode
If both rectifier/regenerating units are rated such that each separate
unit is capable of carrying the full load
current, the following possibilities are available with respect to redundant operation:
• Uninterrupted changeover of the 12-pulse master unit to stand-alone 6-pulse mode in the event of
failure of the 12-pulse slave unit during 12-pulse mode:
If the 12-pulse master
is required to continue to run in "normal" stand-alone 6-pulse mode in the event of
failure
of the 12-pulse slave unit without interruption, "External fault 3" must not be "wired" to the Peer-to-
Peer interface, but instead the parameterization P573.i001 (or i002) = 1 is required on the 12-pulse master.
If the master unit is also required to continue to run without an interruption in the event of failure of the Peer-
to-Peer interface cable, the Peer-to-Peer telegram failure monitoring time also has to be switched off via
P687.i003= 0 on the master
.
• Reconnection of the 12-pulse slave unit during operation of the master:
If (12-pulse) operation of a 12-pulse slave unit is required to be reinstated following an interruption of the
Peer-to-Peer interface cable without error message and during (stand-alone 6-pulse) operation of the master
unit, the Peer-to-Peer telegram failure monitoring time also has to be switched off via P687.i003= 0 on the
12-pulse slave
unit.
• Changeover of the 12-pulse slave unit to stand-alone 6-pulse mode in the event of failure of the 12-
pulse master unit:
In the event of failure of the master unit during 12-pulse mode, it is possible for the 12-pulse slave unit to
change over to stand-alone 6-pulse mode almost without interruption, because all external control
commands that are wired to the terminals of the master unit (e.g. ON command) are also carried to the
terminals of the 12-pulse slave unit. Externally implemented logic
must ensure that in the event of failure of
the master unit, the 12-pulse slave is switched from the basic to the reserve setting. The 12-pulse slave must
be parameterized appropriately in the reserve setting to facilitate stand-alone 6-pulse mode with external
control. The Peer-to-Peer telegram failure monitoring time also has to be switched off via P687.i003= 0 in
this case.
AoteWell Automation Sales Team
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