Siemens SINUMERIK 840D sl Function Manual page 164

Safety Functions Integrated in the System/Drive
6.7 Safe software limit switches (SE)
Prerequisites
The following prerequisites must be fulfilled for the "safe software limit switches"
function:
S The "safe software limit switches" function must be enabled
S The axis/axes must have been safely referenced (user agreement)
S SGE "SE selection" must be supplied (configured) in both channels
Warning
!
"Safe software limit switches" are only effective if the user agreement has been
given.
6.7.1 Effects when an SE responds
Warning
!
The SE function does not predictively monitor the SW (software) limit switches.
This means that the axis stops after passing the limit position. The distance
traveled after the SE is dependent on:
– How the function was parameterized (monitoring clock cycle, stop response,
...)
– The actual speed
– The design of the axis
Configurable stop responses
When an axis passes (actuates) a "safe software limit switch", a stop response
configured in the following machine data is generated:
for 840D sl:
MD 36962: $MA_SAFE_POS_STOP_MODE
for SINAMICS S120:
p9562: SI motion SLP (SE) stop response (Control Unit)
The user can select either STOP C, D or STOP E.
Effect
S The configured stop response is initiated
S The relevant alarm is displayed
6-164
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
© Siemens AG 2008 All Rights Reserved
05.08