3 Safety-Related Functions
11.03
3.4 Safe operating stop (SBH)
© Siemens AG 2003 All Rights Reserved
3-90
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
3.4.2
Effects when the limit is exceeded for SBH
If the axis/spindle is being monitored (SGA "SBH active" = 1) and leaves, for
example, the standstill tolerance window as the result of an external influence
or an undefined setpoint input, the effects are as follows:
•
The axis switches to STOP A/B configured using the following MDs:
For 840D
36956: $MA_SAFE_PULSE_DISABLE_DELAY
for 611 digital
1356:
$MD_SAFE_PULSE_DISABLE_DELAY
and
for 840D
36960: $MA_SAFE_STANDSTILL_VELO_TOL
for 611 digital
1360:
$MD_SAFE_STANDSTILL_VELO_TOL
•
An alarm is generated (for 840D: 27010, for 611 digital: 300907)
The time response of the system is as follows if the limit value is violated when
the safe operating stop function is active:
n
c)
t
1
t
2
STILL_02.DS4
t
t
6
t
3
t
4
t
5
Error a)
Tolerance
exceeded b)
Start of stop reaction sequence
t
7
= =
s
Standstill
tolerance
Creep
speed
d)
t
8
t
9
STOP B
STOP A
d) Transition from STOP B
to STOP A (pulse disabling)
not to scale
Fig. 3-14
Timing when the limit value is exceeded with active SBH
Effects
Time response when a
limit value is violated
