System FMEA of Safe Servo Stop Function Additional Manual Page 2
Additional Manual
Safe_Servo_Stop_FMEA01.doc; A-80495-106; rev.01; 24 March,2005
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FMEA of Safe Servo Stop Function
1. Application System
GDL
(Lock Status)
SGD
(Door Status)
Check double signals independently.(*4)
DOFEXT
5V
24V
0V
A
S
Check the logic between DOFEXT and AS.
(Correct condition is as follows.)(*1)
(a) DOFEXT=0, AS=1
(b) DOFEXT=1, AS=0
Check double signals independently.(*2)
Check the relation ORQ, GDL and SGD.
(Correct condition is as follows.)(*3)
(a) ORQ=open, GDL=unlock, SGD=0(open)
(b) ORQ=close, GDL=lock, SGD=1(close)
(c) ORQ=open, GDL=unlock, SGD=1(close)
SVEN
(Enable signal)
Check the logic between SVEN, SGD and
A
S.
(Correct condition is as follows.)(*5)
Contents Summary of System FMEA of Safe Servo Stop Function Additional Manual
- Page 1System FMEA of Safe Servo Stop function Authors A. Hirai / SLB51 Date of document release 24.March.2005 Document number A-80495-SL-106 Revision Rev 01 File name SAFE_SERVO_STOP_FMEA01 Company FANUC LTD Address 3580 Komanba, Shibokusa, Oshino-mura, Minamitsuru-gun,Yamanashi 401-0597 JAPAN Contents: T
- Page 2FMEA of Safe Servo Stop Function 1. Application System DOFEXT 24V Check the logic between DOFEXT and AS. 5V (Correct condition is as follows.)(*1) (a) DOFEXT=0, AS=1 (b) DOFEXT=1, AS=0 0V AS GDL Check double signals independently.(*2) (Lock Status) Check the relation ORQ, GDL and SGD. (Correct condi
- Page 32. Failure Mode Evaluated Analysis Fault ORQ DOFEXT AS *LGD SGD SVEN Result assumption close 1(off) 1 unlock 0 0 Fixed AS=1 PMC detects the (PWM off) (open) Inconsistency between DOFEXT and AS.(*1) open 0(on) 1 unlock 0 0 Fixed AS=1 When door is closed, (PWM off) (open) PMC detects the Inconsistency