Digital And Analog Nck I/Os (A4); Brief Description - Siemens SINUMERIK 840D sl Function Manual

Digital and analog NCK I/Os (A4)

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Brief Description

General information
Signals can be read and output in the interpolation cycle via the "digital and analog
NCK I/Os". The following functions can be executed with these signals, for example:
● Several feedrate values in one block
● Several auxiliary functions in one block
● Rapid retraction on final dimension
● Axis-specific delete distance-to-go
● Program branches
● Rapid NC Start
● Analog calipers
● Position switching signals
● Punching/nibbling functions
● Analog-value control
Access to NCK I/Os:
● NCK I/O via PLC: for Onboard / and PROFIBUS-I/Os
● NCK I/O via PROFIBUS: for PROFIBUS I/Os
Advantages of the function "NCK-I/Os via PROFIBUS"
With reference to the function "NCK-I/Os via PLC" the following are the advantages for the
direct communication of the NCK with the PROFIBUS-I/Os:
● Direct access to the PROFIBUS-I/O, without diversion via the PLC.
● The PLC-operating system is not being loaded.
● Reading is possible simultaneously from part program/synchronous actions and complie
● The configured I/O-areas must not follow one another contiguously.
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
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