Nck Digital Outputs - Siemens SINUMERIK 840D sl Function Manual

Figure 1-1
1.2.2.2

NCK digital outputs

Number
The available digital NCK outputs can be defined (in groups of eight) using the following
general machine data (number of active digital NCK output bytes):
MD10360 $MN_FASTIO_DIG_NUM_OUTPUTS
Function
The digital NCK outputs provide the option of outputting important switching commands at
high speed as a function of the program processing status.
The signal state of digital output [n] can be set or read again directly in the part program
using system variable $A_OUT[n].
There are also several ways of changing this set signal state via the PLC (see fig.).
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Signal flow for digital NCK inputs
A4: Digital and analog NCK I/Os
1.2 NCK I/O via PLC
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