Connection And Logic Operations Of Fast Digital I/Os - Siemens SINUMERIK 840D sl Function Manual

Digital NC outputs without hardware
If digital NC outputs, as defined via MD10360, are written by the part program, but are not
available as hardware, no alarm is output. The NC value can be read by the PLC (DB10 DBB64
or DBB186 ... ).
2.2.5.3

Connection and logic operations of fast digital I/Os

Function
Fast NC I/O inputs can be set via the software depending on the fast-output signal states.
Overview:
Connecting
The NC I/O fast input is set to the signal state of the assigned fast output.
OR operation
The NC I/O fast input adopts the signal state as a result of the ORing of the output signal with
the assigned input signal.
AND operation
The NC I/O fast input adopts the signal state as a result of the ANDing of the output signal
with the assigned input signal.
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
A4: Digital and analog NC I/O for SINUMERIK 840D sl
2.2 Indirect I/O access via PLC
39