Siemens SINUMERIK 840D sl Function Manual page 226

Connecting sensors and actuators
8.4 Safety-related CPU-CPU communication (F_DP communication)
MD13336 $MN_SAFE_SDP_ASSIGN: SPL assignment
For the SPL assignment, the SPL outputs ($A_OUTSE) are selected, which are assigned to
the F-net data signals via the F-net data filter. Only a contiguous area can be selected.
The SPL assignment is set using MD $MN_SAFE_SDP_ASSIGN[0...m].
The SPL output area data is specified in the decimal notation in the following format:
$MN_SAFE_SDP_ASSIGN[n] = aaa bbb with
aaa: Area limit 1, SPL-SGA $A_OUTSE[aaa]
bbb: Area limit 2, SPL-SGA $A_OUTSE[bbb]
The following conditions should be observed when specifying the area limits:
● all area data is valid: (aaa > bbb), (aaa < bbb), (aaa = bbb)
● |(aaa - bbb)| ≤ 16
In case of an error, Alarm 27301 "F_DP: MD %1[%2]: SPL coupling incorrect".
● |(aaa - bbb)| = y
With y = number of F-net data signals selected in the MD F-net data filter
$MN_SAFE_SDP_FILTER.
In case of an error, Alarm 27303 "F_DP: Number of signals in MD %1[%2] < > MD %3[%4]"
is output.
Example of an NCK parameterization (see the "Example for an NCK parameterization")
The selected SPL outputs $A_OUTSE[1...4] and $A_OUTSE[33...36] are transferred in the F-
net data corresponding to the F-net data filter of the particular SPL connection, refer to the
above diagram "F-net data transfer F_SENDDP".
MD13337 $MN_SAFE_SDP_FILTER: F-net data filter
The F-net data filter allows the SPL outputs ($A_OUTSE), which are to be transferred, to be
distributed across any F-net data signals.
The F-net data filter is set using MD $MN_SAFE_SDP_FILTER[0...m].
Example of an NCK parameterization (see the "Example for an NCK parameterization")
The parameterized SPL outputs of the F_DP communication relationship (DP_DP_ID: 2000)
are distributed via the F-net data filter to bits 0, 4, 8 and 12 (1st sub-slot) and bits 3, 7, 11 and
15 (2nd sub-slot) in the F-net data of the F-telegram, see the above diagram, "F-net data
transfer F_SENDDP".
Note
Within an SPL connection, an F-net data signal of an F-telegram may only be occupied by one
SPL coupling via the F-net data filter. When allocated a multiple number of times, Alarm 27302
"F_DP: Dual allocation MD %1[%2] - MD %3[%4]" is output.
MD13335 $MN_SAFE_SDP_TIMEOUT: Monitoring time
By specifying the monitoring time, the time is specified within which an F- telegram from
F_SENDDP must be acknowledged by F_RECVDP.
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated