Operating Hours Counter - Siemens SINAMICS Series Operating Instructions Manual

10.18 Switching on auxiliary circuits
This function serves as a switch on command for auxiliaries (e.g. motor fans).
The "Switch on auxiliary circuits" 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" goes to 1 at the same time as the "Switch on" command.
Following this, the system remains in operating state o6.0 for a parameterizable time
(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 parameterizable time (p50094), the "Switch on
auxiliaries" signal goes to 0 If, however, the "Switch on" command is issued again before this
time elapses, operating state o6.0 is not retained; instead, the line contactor is immediately
closed.
10.19 Operating hours counter, unit fan
SINAMICS DCM converters with rated DC current of ≥ 210 A, are equipped with fans:
● Units <400 A: Two internally supplied fans
● Units ≥400 A: One fan that is connected to the line supply
Parameter r53136 displays which unit fan is used for the particular converter.

Operating hours counter

Every unit fan has an operating hours counter. The counter states are displayed at
parameter r50960[0..4].
r50960[0..3] Operating hours counter for the fans connected at the internal unit connectors
r50960[4]
The operating hours counter is incremented, if
● SINAMICS DCM switches-on the corresponding fan AND
● it actually rotates
i.e. the speed is higher than 5% of the response threshold of the fan monitoring (this does
not apply to r50960[4])
The operating hours counters for unit fans that are not available are not incremented.
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
XV1 to XV4
For SINAMICS DCM Control Modules, operating hours counter for the fan
controlled via r53135[0].
Descriptions of functions
10.18 Switching on auxiliary circuits
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