Siemens SINUMERIK 840D sl Function Manual page 321

03.06
Caution
An error in the crosswise data comparison (STOP F, displayed using Alarms
27001, 27101 and onwards or F01711) only results in a subsequent STOP B/A
response, if at least one of the safety-relevant functions SBH, SG is active. If only
the function "n < n
result in a subsequent STOP B/A response.
Note
If the axis/spindle runs at a speed n
two monitoring channels, the SGA "n < n
This must be taken into account in the safe processing of the SGAs.
SG active, bits 1, 0
The SGAs "SG active bits 1, 0" display which safely-reduced speed and therefore
which speed limit value is actively monitored. The SGAs are only updated if the
function "SBH/SG" is enabled and SG is active (SGE "SBH/SG de-selection" = 0
and "SBH de-selection" = 1).
Table 8-8 Display of the active safely-reduced speed
SGA
SG SG SBH/
Active Active SG ac-
Bit 1 Bit 0 tive
=0 =0 1
=0 =0 1
=0 =1 1
=1 =0 1
=1 =1 1
=0 =0 0
Note:
The state "SG active bits 1, 0" = "0" has different meanings. A clear interpretation can be obtained by additionally evalu-
ating the SGAs "SBH active" and "SBH/SG active".
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
" is active, then a crosswise data comparison error does not
x
x
SBH
active
1
SBH is active (safely-reduced speed is not active)
0
Speed limit value for SG1 active
0
Speed limit value for SG2 active
0
Speed limit value for SG3 active
0
Speed limit value for SG4 active
0
Neither SBH nor SG is active
, then as a result of actual differences in the
" can have different states.
x
Meaning
Data Description
8.3 Interface signals
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