Siemens SINUMERIK 840D sl Function Manual page 109

Figure 7-3
Deselecting SBH
Safe Operating Stop can be deselected using SGE "SBH/SG deselection" (= "1" signal); this
results in a general deactivation of SBH and SG. The SBH function is also deselected when
the SG function is selected using the SGE "SBH deselection".
Note
The delay time must be selected as a function of the distance to the hazardous location. The
speeds to be taken into account in this respect are specified in Standard DIN EN ISO 13855.
Configuring NCK-SGAs
The NCK-SGA "SBH active" is configured using the following machine data:
For 840D sl
MD36981 $MA_SAFE_SS_STATUS_OUTPUT
Configuring NCK-SGEs
For 840D sl
MD36971 $MA_SAFE_SS_DISABLE_INPUT
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.
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Timing when SBH is selected from SG
Safety functions integrated in the system/drive
7.2 Safe Operating Stop (SBH)
109