Error Analysis - Siemens SINUMERIK 840D Description Of Functions
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2 General Information about Integrated Safety Systems
2.12 Error analysis
2.12 Error analysis
Monitoring
The SINUMERIK 840D control with SIMODRIVE 611 digital is equipped with
various monitoring functions that detect system errors and initiate the
appropriate reactions (refer to the relevant documentation).
These standard functions do not comply with safety Category 3 according to
EN 954-1.
The safety functions of SI that are based on crosswise data comparison and
forced checking procedure are capable of detecting system errors and bringing
the machine into a safe condition (refer to Chapter 3, "Safety Functions").
Fault analysis
Based on the appropriate Directives and Standards, a detailed fault analysis is
carried-out using SINUMERIK Safety Integrated
summary lists the disturbing effects and system faults controlled by
SINUMERIK Safety Integrated
the basis was disturbing quantities that are already known.
Table 2-11
Error analysis in the set-up mode
Assumed error Error causes
Spindle speed
Defect in the
too high
drive or control
system,
Encoder fault in
2-encoder
operation,
operator error
etc.
Axis speed too
high
Axis or spindle
Defect in the
has
drive or control
inadmissibly
system,
moved away
operator error
from standstill
etc.
position
Axes have
Defect in the
inadmissibly
drive or control
exited operating
system,
range
operator error
etc.
Response of
Defect in the
machine control
control
to incorrect
operator error
position signal
etc.
Error relating to
Defective
the input/output
cable,
of process data
incorrect
information, or
similar
1)
refer to: Appendix, References General /1/
2-46
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
with an extremely low residual risk; whereby
Error control
MDIR, Appendix
Safe limitation of speed
Chapter 1.2.4
or axis velocity with SG;
Chapter 1.2.7
configurable stop
Chapter 1.3.6
functions according to
Cat. 2
Safe standstill monitoring
Chapter 1.2.6
for position control with
Chapter 1.2.7
SBH;
Chapter 1.3.6
configurable stop
Chapter 1.4.2
function, Cat. 0/1
Chapter 1.4.3
Safe standstill with SH,
Stop function, Cat. 0
" Safe software limit
Chapter 1.2.4
switches" SE;
Chapter 1.2.7
configurable stop
Chapter 1.3.7
functions according to
Chapter 1.3.8
Cat. 2
"Safe software cams" SN;
Chapter 1.2.4
safe signal and position
Chapter 1.2.7
output
Chapter 1.3.8
Chapter 1.4.2
Chapter 1.4.3
Two-channel input/output
Chapter 1.2.5
of safety-relevant signals
Chapter 1.3.8
(SGE/SGA), crosswise
Chapter 1.4.2
data comparison;
Chapter 1.4.3
initiation of stop functions
according to Cat. 1
. The subsequently listed brief
1)
Comments
According to currently
applicable standards (TC143),
the SG function is – depending
on the technology – only
permissible in combination with
agreement, jog mode, start
button and Emergency Stop
According to currently
applicable standards (TC143),
the SG function is – depending
on the technology – only
permissible in combination with
jog mode, start button and
Emergency Stop
Low-wear safe shutdown of the
energy feed to the drive,
this function does not replace
the main machine breaker
for electrical isolation
Is essentially used for
machinery protection,
can also be used to restrict
working zones in conjunction
with personnel protection
Wear-free "safe software cams
(SN)
used to safely detect the
position of axes.
Can be used to isolate physical
areas
External two-channel inputs or
further processing required if
function is intended to protect
operating personnel
© Siemens AG 2003 All Rights Reserved
11.03
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