Siemens SINAMICS DCM Operating Instructions Manual page 416

Descriptions of functions
10.23 Connecting units in parallel and in series
● The units are connected using 8-core shielded patch cables, type UTP CAT5 in acc. with
● The parallel interface also enables any BICOs (that can be parameterized by the user) to
● For additional details on how units are connected in parallel, please refer to function
Control
• For all of the topologies, a SINAMICS DCM is used as the master converter. The other
• The control commands - switch-on/stop, operating enable, fast stop etc. are fed to the
• The speed setpoint and the speed actual value should be entered at the master
• The optimization runs should be started at the master converter. The slave converters
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ANSI/EIA/TIA 568, such as those that are used to network PCs. A standard 5 m long
cable can be directly purchased from Siemens (Order No.: 6RY1707-0AA08). (n-1)
cables are required to connect n units. The bus termination must be activated at the units
at the start of the bus and at the end of the bus (p51805=1).
be exchanged between nodes. See function diagrams 9352 and 9355. Exchanging data
in this way is not required for closed-loop control of the firing pulses or for generating
them, and is available for the user to make use of in any way he or she wishes.
diagrams 9350, 9352, and 9355.
converters are called slave converters.
master converter for all topologies.
At the slave converters, terminals 12 and 13 must be permanently connected to terminal
9. If, in spite of this, a control command is entered at a slave converter, then it has the
following consequences:
OFF1
OFF2
OFF3
E-STOP
Operating enable The current is reduced to zero at the slave, then the slave goes
As long as the master does not receive a switch-on command, the slaves stay in
operating state o10.0 (wait for switch-on from the master).
If the master receives a switch-on command, then it automatically transfers this to
the slaves. Then, all units carry out their switch-on sequence, i.e. they attempt to go
into operating state o0. However, the master waits in operating state o1.7 until all
slaves have reached operating state o0 (exception: n+m operation for a 6-pulse
parallel connection)
If a slave leaves operating state o0, then the master outputs fault message F60044
(exception: n+m operation for a 6-pulse parallel connection)
converter.
must be connected and ready for operation at this point.
Has no effect, as long as n<nmin has not been reached, then the
current is reduced to zero at the slave and the slave goes into
operating state o7.0 or o7.1
The current is reduced to zero at the slave, then the slave goes
into operating state o10.1 or o10.2
OFF3 has no effect, as long as n<nmin has not been reached,
then the current is reduced to zero at the slave and the slave
goes into operating state o9.1 or 9.2
The current is reduced to zero at the slave, then the slave goes
into operating state o10.3
into operating state o1.1 or o1.
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
SINAMICS DCM Control Module