Siemens SINUMERIK 840D Description Of Functions page 89

11.03
SGn
Fig. 3-13
De-selecting SBH The safe operating stop state can be de-selected with SGE "SBH/SG de-
selection" (="1" signal), resulting in general de-activation of SBH and SG. The
SBH function is also de-selected when the SG function is selected via the SGE
"SBH de-selection".
SGA "SBH active" If this SGA is set, then safe operating stop (SBH) is active, i.e. the axis is safely
monitored for zero speed. This signal can be used, for example, to implement
protective door interlocks.
NCK SGA "SBH active" is configured using the following machine data:
Configuring
NCK SGAs
For 840D
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
v
a)
V
act
SGE "SBH desel."
SGn is active
Timing when selecting SBH from SG
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
stipulated in Standard DIN EN999.
MD 36981: $MA_SAFE_SS_STATUS_OUTPUT
3 Safety-Related Functions
3.4 Safe operating stop (SBH)
a) Initiation of braking
Delay time
speed switchover
SBH is active
Braking time
Timer running
t
SG_SBH.DS4
3-89