Selecting/Deselecting The Safe Operating Stop - Siemens SINUMERIK 840D sl Function Manual

p9530 SI Motion standstill tolerance (Control Unit)
Note
The width of the SBH tolerance window should be based on the standstill (zero speed)
monitoring limit - and should lie slightly above it. Otherwise, the standard monitoring functions
of the control could be ineffective. In this case, the encoder coarse position must be taken into
account for a 1-encoder system.
Figure 7-2
Preconditions
The following preconditions must be satisfied (see Chapter "System requirements (Page 41)"):
● The option and functions must be enabled in the axis-specific machine data
● SGEs "SBH/SG deselection" and "SBH deselection" must be supplied in the NCK and drive
monitoring channel
7.2.1

Selecting/deselecting the Safe Operating Stop

Selecting SBH
The Safe Operating Stop function is selected using the following SGEs:
SBH/SG se‐
lection
= 1
= 0
= 0
Note:
x → signal state is arbitrary
The active SG stage is displayed using SGA "SGA active bit 0" and "SG active bit 1".
1)
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Standstill tolerance
SGE SGA
SBH dese‐ SBH active
lection
x 0
= 0 1
= 1 0
Safety functions integrated in the system/drive
7.2 Safe Operating Stop (SBH)
Meaning
SBH and SG are deselected
SBH is selected
SG is selected (see Chapter "Safely reduced speed
(SG) (Page 137)").
1)
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