Siemens SINUMERIK 840D sl Function Manual page 187

05.08
Table 7-1 SGE/SGA required as a minimum
Function Minimum SGEs required
Safely reduced SBH/SG deselection
speed (SG) SBH deselection
SG selection, bit 1 (only for SG changeover)
SG selection, bit 0 (only for SG changeover)
Test stop selection (drive)
External stops
if gearbox stages are being used
Gear ratio selection, bit 2 (only if it is necessary to se-
lect the ratio)
Gear ratio selection, bit 1 (only if it is necessary to se-
lect the ratio)
Gear ratio selection, bit 0 (only if it is necessary to se-
lect the ratio)
Safe software SE selection (only for SE changeover)
limit switches Test stop selection (drive)
(SE) SBH/SG deselection
(at least for test during commissioning [start–up])
External stops
Safe software Test stop selection (drive)
cams (SN) SBH/SG deselection
(at least for test during commissioning [start–up])
External stops
Different signal run times in the channels
The signal timing in the two monitoring channels varies (the PLC cycle time takes
up most of the available time in the drive monitoring channel). To prevent the
crosswise data comparison function from being immediately activated after a signal
change, a tolerance time is defined using the following machine data.
for 840D sl:
MD 36950: $MA_SAFE_MODE_SWITCH_TIME
for SINAMICS S120:
p9550: SI motion SGE changeover tolerance time (Control Unit)
This data specifies the time period for which different signal states may be toler-
ated after the SGEs have been changed–over before an error message is output.
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Connecting Sensors/Actuators
7.1 Safety–related input/output signals
Minimum SGAs required
SBH/SG active
Status, pulses cancelled
(drive)
STOP A/B, C, D, E active
(only where required)
active SG stage, bits 0, 1 active SG stage, bits 0, 1
(only where required)
SBH/SG active
Axis safely referenced
Status, pulses cancelled
(drive)
STOP A/B, C, D, E active
(only where required)
SBH/SG active
STOP A/B, C, D, E active
(only where required)
Axis safely referenced
SN1–, SN2–, ..., SN30–
(only where required)
SN1+, SN2+, ..., SN30+
(only where required)
Status, pulses cancelled
(drive)
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