Siemens Sinumerik 840D sl Function Manual page 235

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Substitute values
If, within the scope of a specific machine configuration, the corresponding
PROFIsafe module for a slot is not connected, static substitute values can be
parameterized to supply the associated SPL inputs ($A_INSE).
Parameterization
The substitute values are parameterized using machine data 13305
$MN_PROFISAFE_IN_SUBS[n].
The substitute value for SPL input defined as lower range limit in MD10388:
$MN_PROFISAFE_IN_ASSIGN, is parameterized in MD
$MN_PROFISAFE_IN_SUBS, bit 0. In bit 1, the substitute value for the SPL input
"lower area limit + 1" etc.
Thus, substitute values are input into MD $MN_PROFISAFE_IN_SUBS referred to
the SPL input area defined in MD $MN_PROFISAFE_IN_ASSIGN. If substitute
values outside this SPL input area are set to a value of 1 in MD $MN_PROFI-
SAFE_IN_SUBS, then Alarm 27205 "PROFIsafe: Number of signals MD %1[%2] <
> MD %3[%4]" is displayed.
Activation
In order to provide machinery manufacturers with the option of defining different
substitute values for various machine constellations for the SPL input range
belonging to a PROFIsafe input module, the output of parameterized substitute
values is explicitly activated in a machine data set using:
MD13304 $MN_PROFISAFE_IN_SUBS_ENAB_MASK[m], bit x = 1
Slot mode
As a result of the possibility of being able to activate or deactivate a slot as well as
to activate substitute values, the following slot modes are obtained:
S Active
In the control, a PROFIsafe driver is active for the slot -- and the F net data
transferred from the associated PROFIsafe input module is output to the SPL
inputs.
S Passive
In the control, there is no PROFIsafe driver active for the slot, and the para-
meterized substitute values are output at the SPL inputs.
S Inactive
In the control, there is no PROFIsafe driver active for the slot, and no data is
output at the SPL inputs. The inputs assigned using MD10388
$MN_PROFISAFE_IN_ASSIGN remain in the default state 0.
The following table shows the interrelationship between the machine data and the
slot mode obtained from this.
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Connecting Sensors/Actuators
7.3 Modular PROFIsafe I/O interface
7-235