Siemens SINUMERIK 840D Description Of Functions page 449

11.03
Fig. 8-4
With this safe brake control, only the operating brake represents a potential
Description
hazard.
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Start of test phase
Check test input I1
(time t )
2
Test input: level low
Activate output Q1
(time t )
3
Check test input I1
(time t )
4
Test input: level high
Delayed activation of
output Q2 (time t )
5
Check test input I1
(time t )
6
Test input: level low
End of test phase
Flowchart for the test routine
8 Application examples
8.2 Two-channel brake control with SI (SPL)
Brake has already been
applied at this point
(e.g. test stop phase 1)
New test?
Test input:
level high
Conductor D1 short-circuit to
current source or switching
element Q1 short-circuit to
current source or malfunction.
Error message
Test input:
level low
Conductor D2 short-circuit to
current source or switching
element Q2 short-circuit to
current source or malfunction.
Error message / deactivate
output Q1
Test input:
level high
Output Q2 no longer capable of
operation after test.
Error message / deactivate
output Q1/Q2
Delayed pulse disable
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