Description Of The Leds On The Cud - Siemens SINAMICS Series Operating Instructions Manual

2. Checking that the thyristors can be triggered
All of the thyristors are triggered in pairs and in this case, a current must flow (as a
minimum, 5% of r50072[1]). Otherwise, a thyristor cannot be triggered. This can also be
caused by a fault in the firing pulse generation.
Faults that are detected result in fault message F60061. The fault value provides information
as to which thyristor was detected to be defective and what the possible cause of the fault
could be.
10.34.4

Description of the LEDs on the CUD

Figure 10-90 Layout of the LEDs
The individual states during ramp-up are indicated by means of the LEDs on the CUD.
● The duration of the individual states varies.
● If an error occurs, the ramp-up procedure is aborted and the cause of the error is
indicated via the LEDs.
Remedy: Insert the appropriate memory card with the correct firmware and
parameterization.
● At the end of a successful ramp-up, all the LEDs are switched off briefly.
● After the ramp-up, the LEDs are controlled via the loaded firmware.
The description of the LEDs after ramp-up applies.
Note
The LEDs can only be seen when the front cover of the SINAMICS DC MASTER is opened.
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
NOTICE
Possible rotation of the motor shaft.
The low current that flows during this test can cause the motor shaft to briefly rotate for
motors that are very easy to move and are not loaded, as in this operating state, the full
field is already present.
Descriptions of functions
10.34 Diagnostics
635