Effects When The Limit Is Exceeded For Sbh - Siemens SINUMERIK 840D sl Function Manual

Safety Functions Integrated in the System/Drive
6.2 Safe operating stop (SBH)
SGA "SBH active"
If this SGA is set, then safe operating stop (SBH) is active. This means that the
axis is safely monitored for zero speed. This SGA can be used, for example, to
implement protective door interlocking functions.
6.2.2

Effects when the limit is exceeded for SBH

Warning
!
If the "safe operating stop" function is activated, when a fault situation occurs, the
axis mechanical system can exhibit jerky, uneven motion. The magnitude of this
movement depends on the following parameters:
S Design of the mechanical system and gear ratio between the motor and
mechanical system
S Speed and acceleration capability of the motor
S Magnitude of the selected monitoring clock cycle
S Magnitude of the selected SBH tolerance window
If the axis/spindle is being monitored (SGA "SBH active"=1) and leaves, for exam-
ple, the standstill tolerance window as the result of an external influence or an un-
defined setpoint input, the effects are as follows:
Effects
S The axis switches to STOP A/B configured using the following MDs:
for 840D sl: 36956: $MA_SAFE_PULSE_DISABLE_DELAY
for S120: p9556 SI motion pulse cancelation delay time (Control Unit)
and
for 840D sl: 36960: $MA_SAFE_STANDSTILL_VELO_TOL
for S120: p9560 SI motion pulse cancelation shutdown speed (Control Unit)
S An alarm is generated (for 840D sl: 27010, for S120: F01707)
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
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05.08