11.03 2 General Information about Integrated Safety Systems
2.12 Error analysis
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
2-47
Table 2-12 Error analysis in test mode
Assumed error Error causes Error control MDIR, Appendix
1)
Comments
Spindle speed
too high
Defect in the drive or
control system,
encoder fault in 2-
encoder operation,
operator error etc.
Safe limitation of speed
or axis velocity with SG;
configurable stop
functions according to
Cat. 2
Chapter 1.2.4
Chapter 1.2.7
Chapter 1.3.6
According to currently
applicable standards
(TC143), the SG function
– depending on the
technology – is only
permissible in combination
with agreement, jog mode,
start button and
Emergency Stop
Axis speed too
high
or similar According to currently
applicable standards
(TC143), the function –
depending on the
technology – is only
permissible in combination
with JOG mode, start
button and Emergency
Stop
Axis or spindle
has inadmissibly
moved away
from standstill
position
Defect in the drive or
control system,
operator error etc.,
part program error
or similar
Safe standstill
monitoring for position
control with SBH;
configurable stop
function acc. To Cat.
0/1
Chapter 1.2.6
Chapter 1.2.7
Chapter 1.3.6
Chapter 1.4.2
Chapter 1.4.3
No wear, safe
disconnection of energy
feed to drive to allow
manual intervention in
danger zone; function
does not replace machine
main switch
Safe standstill with SH,
Stop function, Cat. 0
with respect to electrical
isolation
Axes have
inadmissibly
exited operating
range
Defect in the drive or
control system,
operator error etc.,
part program error
or similar
"Safe software limit
switches" SE;
configurable stop
functions according to
Cat. 2
Chapter 1.2.4
Chapter 1.2.7
Chapter 1.3.7
Chapter 1.3.8
Wear-free safe cams,
are essentially used for
machinery protection,
can also be used to
restrict working zones in
conjunction with personnel
protection
Response of the
machine control
to incorrect
position signal
Defect in the control
operator error,
part program error
or similar
"Safe software cams"
SN;
safe signal and position
data output
Chapter 1.2.4
Chapter 1.2.7
Chapter 1.3.8
Chapter 1.4.2
Chapter 1.4.3
Wear-free "safe software
cams"
used to safely detect the
position of axes.
Can be used to demarcate
physical areas
Error relating to
the input/output
of process data
Defective cable,
incorrect information
or similar
Two-channel
input/output of safety-
relevant signals
(SGE/SGA), crosswise
data comparison;
initiation of stop
functions according to
Cat. 1
Chapter 1.2.5
Chapter 1.3.8
Chapter 1.4.2
Chapter 1.4.3
External two-channel
inputs or further
processing required if
function is intended to
protect operating
personnel
1)
refer to: Appendix, References General /1/
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