Siemens SINUMERIK Series Function Manual page 26

A4: Digital and analog NCK I/Os for SINUMERIK 840D sl
1.1 Introduction
Table 1- 1
Digital inputs
Digital outputs
Analog inputs
Analog outputs
References:
For further information about the hardware specification, refer to:
● SINUMERIK 840D sl NCU Manual
● SIMATIC ET 200S FC Operating Instructions
Access to NCK I/Os:
The fast digital and analog NCK I/Os can be accessed in the following ways:
● Access via PLC (Page 27) (for on-board I/Os and PROFIBUS I/Os)
● Access via PROFIBUS (Page 54) (for PROFIBUS I/Os)
Monitoring
The following monitoring functions are active for the external NCK I/Os:
● During run-up:
● During cyclic operation:
In the event of a fault, NC-Ready is canceled and an alarm is output.
Response to faults
The digital and analog NCK outputs are switched to a safe status (0 V at output) in the event
of faults (e.g. NC-Ready = 0) in the NCU or power failures.
26
Maximum number of digital and analog NCK I/Os
– Check whether the arrangement of components of the I/O modules in the ET 200
modules matches the MD assignments.
– Sign-of-life monitoring in interpolation cycles
– Module monitoring in interpolation cycles
– Temperature monitoring
Total NCU on-board
36 4
36 4
8 -
8 -
External NCK I/Os
32
32
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
8
8
Extended Functions