Siemens SINUMERIK 840D sl Function Manual page 518

Data descriptions
9.7 System variable
Associated DB18 values: DB18.DBD62, DBD66
System variables $A_INSEP[1...192]
Images of the PLC-side external SPL input signals (control signals to the PLC-SPL) can be
read using these system variables.
Associated DB18 values: DB18.DBX38.0 ... DBX45.7 ([1...64])
DB18.DBX272.0 ... DBX287.7 ([65...192])
System variables $A_INSEPD[1...6]
Images of the PLC-side external SPL input signals (control signals to the PLC-SPL) can be
read in a double-word-serial fashion (32 bit) using these system variables.
Associated DB18 values: DB18.DBD38, DBD42
System variable $A_OUTSEP[1...192]
Images of the PLC-side external SPL output signals (status signals from the PLC-SPL) can
be read using these system variables.
Associated DB18 values: DB18.DBX46.0 ... DBX53.7 ([1...64])
DB18.DBX288.0 ... DBX303.7 ([65...192])
System variables $A_OUTSEPD[1...6]
Images of the PLC-side external SPL output signals (status signals from the PLC-SPL) can
be read in a double-word-serial fashion (32 bit) using these system variables.
Associated DB18 values: DB18.DBD46, DBD50
System variable $A_MARKERSIP[1..192]
Images of the PLC-side SPL markers can be read using these system variables.
Associated DB18 values: DB18.DBX70.0 ... DBX77.7 ([1...64])
DB18.DBX416 ... DBX413.7 ([65...192])
System variables $A_MARKERSIPD[1...6]
Images of the PLC-side SPL markers can be read in a double-word-serial fashion (32 bit) using
these system variables.
Associated DB18 values: DB18.DBD70, DBD74
System variables $A_PLCSIIN[1..96]
Single-channel direct communication between NCK and PLC-SPL. Signals can be written by
the PLC and read by the NCK.
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated