Nck Analog Outputs - Siemens SINUMERIK Series Function Manual

Binary analog-value display
See "Representation of the NCK analog input/output values (Page 43)".
Behavior during POWER ON / reset
After POWER ON and reset, the analog value at the respective input is passed on. If
necessary, the PLC user program can disable or set the individual inputs to a setpoint.
Analog NCK input without hardware
The following value is read in the case of part program access to analog NCK inputs that are
defined via MD10300, but are not available as hardware inputs:
● The setpoint specified from the PLC (if the IS "Analog value input for NCK from the PLC"
● 0 volts (if the IS "Analog value input for NCK from the PLC" is not set)
This makes it possible to use the functionality of the analog NCK inputs from the PLC user
program without I/O hardware.
1.2.4.2

NCK analog outputs

Function
Analog values to be output very quickly via the analog NCK outputs, bypassing the PLC
cycle times.
The value of the analog output <n> can be defined directly in the part program using system
variable $A_OUTA[<n>].
Before output to the hardware I/Os, the analog value set by the NCK can be changed by the
PLC.
Application
The analog NCK outputs are used in particular for grinding and laser machines.
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
is set to "1")
A4: Digital and analog NCK I/Os for SINUMERIK 840D sl
1.2 Access via PLC
39