3 Safety-Related Functions 11.03
3.1 Basic mechanisms of SI functions
© Siemens AG 2003 All Rights Reserved
3-72 SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Action in the drive monitoring channel:
The drive monitoring channel requests "path stop" or "brake along acceleration
characteristic (NC-MD)". At the same time, the timer set in
$MD_SAFE_STOP_SWITCH_TIME_D is started. The SBH function is
automatically activated after the timer expires.
Action in the NCK monitoring channel:
Essentially the same as the drive channel, the control system monitoring
channel requests "path stop" or "brake along acceleration characteristic
(NC_MD)". At the same time, the timer set in
$MA_SAFE_STOP_SWITCH_TIME_D is started. The SBH function is
automatically activated after the timer expires.
• Effect:
The drive is braked in a group - including simultaneous axes - along the set
traversing path. Endlessly rotating axes are braked at the acceleration
limit. The SBH function is automatically activated after the timer expires.
• Alarm message:
The alarm message "STOP D triggered" is displayed.
• Acknowledgement:
An unintentional restart is prevented for STOP D. The error can be
acknowledged using the NC-RESET key.
SGA STOP D is active
This signal indicates that STOP D is active.
0 signal: STOP D is not active
1 signal: STOP D is active
Action in the drive monitoring channel:
The drive monitoring channel requests an extended stop and retract (ESR). At
the same time, the timer set in $MD_SAFE_STOP_SWITCH_TIME_E is
started. The SBH function is automatically activated after the timer expires.
Action in the NCK monitoring channel:
Essentially the same as the drive, ESR is requested by the control monitoring
channel ESR . At the same time, the timer set in
$MA_SAFE_STOP_SWITCH_TIME_E is started. The SBH function is
automatically activated after the timer expires.
• Effect:
The extended stop and reset that have been configured are started.
• Alarm message:
The alarm message "STOP E triggered" is displayed.
• Acknowledgement:
An unintentional restart is prevented for STOP E. The error can be
acknowledged using the NC-RESET key.
SGA STOP E is active
This signal indicates that STOP E is active.
0 signal: STOP E is not active
1 signal: STOP E is active
The NC-controlled ESR is triggered by writing to the system variable
$AC_ESR_TRIGGER=1 (also refer to /FB3/, M3 "Axis coupling and ESR").
Description of STOP D
Description of STOP E
(SW 6.4.15 and higher)
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