Nck-Spl Program - Siemens SINUMERIK 840D sl Function Manual

Connecting sensors and actuators
8.5 Safe programmable logic
This data has no function for the NCK and PLC (they are not interpreted any further by the
NCK and PLC).
For the NCK, a general machine data field MD13312 $MN_SAFE_SPL_USER_DATA[0...3] is
applicable
Users can save information in this MD that must be set the same as the corresponding data
in DB18 (DBD256, 260, 264, 268), e.g.
Figure 8-33
Differences between the NCK and PLC data are identified using the SPL-CDC and result,
corresponding to the parameterized stop response, in a STOP D/E on all safety-related axes.
Alarm 27090 "Error for crosswise Data comparison NCK-PLC" is output with a reference to
the machine data.
Further, system variable $A_STATSID, bit 27 = 1 is used to indicate to the SPL user that there
is an SPL-CDC error.
Changes to machine data or DB18 data only become effective after power on.
Changes to data are indicated using a corresponding alarm after restart.
8.5.4

NCK-SPL program

Description
The NCK-SPL program is written as an NC program (ASUB) with synchronized actions.
262
Assignment between MD13312 and data block DB18
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated