System FMEA of Safe Servo Stop Function Additional Manual Page 3
Additional Manual
Safe_Servo_Stop_FMEA01.doc; A-80495-106; rev.01; 24 March,2005
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2. Failure Mode Evaluated Analysis
ORQ DOFEXT AS *LGD SGD SVEN
Fault
assumption
Result
close 1(off) 1
(PWM off)
unlock 0
(open)
0 Fixed AS=1 PMC detects the
Inconsistency between
DOFEXT and AS.(*1)
open 0(on) 1
(PWM off)
unlock 0
(open)
0 Fixed AS=1 When door is closed,
PMC detects the
Inconsistency between
DOFEXT and AS. (*1)
close 1(off) 0
(PWM on)
lock 1
close
0 Fixed AS=0 Safety
open 0(on) 0
(PWM on)
lock 1
close
0 Fixed AS=0 Safety
close 1(off) 0
(PWM on)
unlock 0
(open)
0 Fixed *LGD=1 DCS Alarm(*3)
open 0(on) 1
(PWM off)
unlock 0
(open)
0 Fixed *LGD=1 When door is closed,
PMC detects the
Inconsistency between
ORQ and GDL. (*3)
close 1(off) 0
(PWM on)
lock 1
close
0 Fixed *LGD=0 Safety
open 0(on) 1
(PWM off)
lock 1
close
0 Fixed *LGD=0 Safety
close 1(off) 0
(PWM on)
lock 1
close
0 Fixed SGD=1 DCS Alarm(*4)
open 0(on) 1
(PWM off)
unlock 1
close
0 Fixed SGD=1 DCS Alarm(*4)
close 1(off) 0
(PWM on)
lock 0
(open)
0 Fixed SGD=0 DCS Alarm(*4)
open 0(on) 1
(PWM off)
unlock 0
(open)
0 Fixed SGD=0 DCS Alarm(*4)
open 0(on) 1
(PWM off)
unlock 0
(open)
1 Fixed AS=1 PMC detects the
Inconsistency between
SVEN, SGD and AS.(*5)
open 0(on) 0
(PWM on)
lock 0
(open)
1 Fixed AS=0 PMC detects the
Inconsistency between
SGD and GDL. (*3)
open 0(on) 0
(PWM on)
unlock 0
(open)
1 Fixed *LGD=1 When door is closed,
PMC detects the
Inconsistency between
ORQ and GDL. (*3)
open 0(on) 0
(PWM on)
lock 0
(open)
1 Fixed *LGD=0 PMC detects the
Inconsistency between
SGD and GDL. (*3)
open 0(on) 0
(PWM on)
unlock 0
(open)
1 Fixed SGD=1 DCS Alarm(*4)
open 0(on) 0
(PWM on)
unlock 0
(open)
1 Fixed SGD=0 DCS Alarm(*4)
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