54
Failure modes
Appendix B
Instruction book, IQAN-MC3
Failure modes for external wiring faults on power drivers - COUT
N
OTICE
Failure modes for internal faults are included in the total PFHd for the module.
Key to symbols and conditions
• = detection leads to the power driver being disabled. Restart conditions are applicaton
specific.
Start-up:
When module is started, all COUT and CRET are off, a test pattern is applied
to detect faults.
Off:
When power driver is off, COUT is on, and CRET is off.
On:
When power driver is on, COUT is on, and CRET is controlling the commanded
current.
Disabled:
After an error is detected, both COUT and CRET are off. No diagnostic is
performed until there is an attempt to reactivate the output. Restart condtions are
application specific
* = Reverse feed of the module. Ability to shut down module via +BAT inhibited.
Ability to shut down in the event of an internal error reduced. Detected at next start-up
Current output
Start-up
Failure mode
Detected
Comment
COUT short circuit to +BAT at start-up
•
Module prevented from starting.
CRET short circuit to +BAT at start-up
•
Module prevented from starting.
Summary of Contents for iqan-mc3
Page 1: ...IQAN MC3 Instruction book Publ no HY33 8001 IB UK Edition 2016 05 16...
Page 18: ...15 Markings Approvals 4 Safety Instruction book IQAN MC3 Markings Approvals...
Page 19: ...16 Markings Approvals 4 Safety Instruction book IQAN MC3...
Page 20: ...17 Markings Approvals 4 Safety Instruction book IQAN MC3...
Page 21: ...18 Markings Approvals 4 Safety Instruction book IQAN MC3...
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