Siemens Simovert Masterdrives Compendium page 67

12.2010
Parameter
DC(channel1)
DC(channel2)
DC
avg
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
♦ Determination of diagnostic coverage
Value
99 %
90 %
94.5 % → average
♦ Determination of Performance Level
•
Structure of SRP/CS according to Category 3
• MTTF is high
d
•
DC is average
avg
•
Sufficient measures against common cause failure
According to EN ISO 13849-1:2008 Appendix K, PL e is achieved
with PFHd = 4.29 x 10
Compendium Motion Control
Configuration and Connection Examples
Comment
Testing of –K1 via –K3 in feedback circuit of
–A2 every time the protective door is closed
Testing of –K2 and –K3 in feedback circuit of
–A1 on request for Emergency Stop (12x per year)
Faults might accumulate undiscovered between
the requests.
DC
1
MTTF ( channel
d
=
DC
avg
1
MTTF ( channel
d
-8
/ h.
DC
2
+
) 1 MTTF ( channel ) 2
d
1
+
) 1 MTTF ( channel ) 2
d
2-39