Siemens SINUMERIK 840D sl Function Manual page 269

Deviating from the recommended setting 7H, the following settings are also possible:
● Bit 1 can be deleted if MD20700 $MN_REFP_NC_START_LOCK (in the channel in which
the SPL is started) is deleted, or, if at the instant that the ASUB starts, the axes (in the
channel, in which the SPL is started) do not have to be safely referenced, e.g. in the park
state.
● Bit 2 can be deleted if no read-in disable is present when booting.
Further, MD11604 $MN_ASUP_START_PRIO_LEVEL (interrupt priority from which the MD
$MN_ASUP_START_MASK is active) must be observed.
To be able to start the NCK-SPL without any errors, according to the required SPL start type
(start via PROG_EVENT or automatic start), when booting, the following machine data must
be taken into account:
MD20106 $MC_PROG_EVENT_IGN_SINGLE_BLOCK, bit 3 or bit 5
MD20107 $MC_PROG_EVENT_IGN_INHIBIT, bit 3 or bit 5
In addition, it may be necessary to not display the processing of the event-controlled programs
via MD20192 $MC_PROG_EVENT_IGN_PROG_STATE, bit 3 or bit 5 on the OPI interface.
This does not influence executing the NCK-SPL, and is only used to visualize program
execution in the HMI context
Starting the PLC-SPL
The PLC-SPL in conjunction with FB4/FC9 has started if the FC9 has signaled successful
execution and has displayed that the end of SAFE.SPF has been reached. This is displayed
using a signal in SAFE.SPF (e.g. $A_PLCSIOUT variable, M function) or SPL status bit 13
(DB18.DBX137.5). Only then may the PLC-SPL be started to ensure that both SPLs run in
synchronism, and therefore the axis-specific monitoring channels are synchronously supplied.
Parameterizing FB4
FB4 may only be started in the cyclic mode (OB1).
Signal
Reg
PIService
Unit
WVar1
WVar2
WVar3
WVar4
Addr1
Addr2
[values in brackets are standard values required for the call]
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Type Value range
ANY PI.ASUP
INT 1 to 10 [1]
INT [1]
INT [1]
INT 0/1 [0]
INT 0/1 [0]
STRING '/_N_CST_DIR/'
STRING '_N_SAFE_SPF'
Connecting sensors and actuators
8.5 Safe programmable logic
Meaning
Assign interrupt
Channel
Interrupt number
Priority
LIFTFAST
BLSYNC
NCK-SPL path name
NCK-SPL program name
269