Switching On Auxiliary Circuits - Siemens SINAMICS DCM Operating Instructions Manual

Descriptions of functions

10.15 Switching on auxiliary circuits

10.15 Switching on auxiliary circuits
This function serves as a switch on command for auxiliaries (e.g. motor fans).
The "Switch on auxiliaries" signal is available at binector r53210[2]:
r53210[2] = 0 ⇒ auxiliaries OFF
r53210[2] = 1 ⇒ auxiliaries ON
This binector must be wired to a digital output in order to activate the auxiliary circuit; See
SINAMICS DCM List Manual, function diagrams 2055, 2060 and 2065.
The "Switch on auxiliaries" signal goes to 1 at the same time as the "Switch on" command.
After this, the system stays in operating state o6.0 for a time that can be parameterized
(p50093). only once this has elapsed is the line contactor closed.
When the "Switch off" command is applied, the firing pulses are disabled and the line
contactor drops out after n < nmin. After a time that can be parameterized (p50094), the
"Switch on auxiliaries" signal goes to 0. If, however, the "Switch on" command is issued
before this time elapses, the system does not stay in operating state o6.0; instead, the line
contactor is closed instantaneously.
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SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619