Siemens SINAMICS G220 - Page 699

• Self-test using internally speci󹪝ed staggered dark pulses: p10041=2
The converter provides both switchable supply voltages VS 1 and VS 2 at terminal block X130.
VS1 and VS2 generate dark pulses, to diagnose the control circuit, for example.
The fail-safe digital input must be connected to di󹪜erent supply voltages:
– Terminal DI
A
is powered from VS1
– Terminal DI
B
is powered from VS2
The self-test using speci󹪝ed dark pulses with VS1 and VS2 (p10041=2) detects a short-
circuit to ground and 24V and a cross circuit.
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T
Q
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Figure14-244 Dark pulses through switchable supply voltagesVS1 and VS2.
P10018 determines the length of the dark pulse for VS 1 and VS 2. The cycle of the dark pulses
has a 󹪝xed value of 5seconds.
The debounce time prevents an unwanted response of the converter to the self-test: p10017
> p10018 + 2ms.
• Self-test with externally speci󹪝ed dark pulses: p10041=3
An external control, e.g. F-PLC, generates dark pulses at the input terminals of a fail-safe
digital input.
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S
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&\FOHS
Figure14-245 Dark pulses from external control system
The length of the dark pulse is prede󹪝ned by the external control system. The maximum wait
time for dark pulses (p10019) can be parameterized.
The debounce time prevents an unwanted response of the converter to the self-test: p10017
> length of the dark pulse of the external control system + 2ms.
The self-test monitors the cycle of the dark pulses. If the self-test does not detect a dark pulse
during the wait time p10019, the converter responds with a fault.
Functions
14.12Safety Integrated
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 697