Behavior During Block Search; Auxiliary Function Output During Type 1, 2, And 4 Block Searches - Siemens SINUMERIK 840D sl Function Manual

H2: Auxiliary function outputs to PLC

8.13 Behavior during block search

Possible applications include:
● Addition of auxiliary functions after block search
● Restoring the initial state to position a part program
Types of auxiliary functions that can be overstored
The following types of auxiliary functions can be overstored:
● M (special function)
● S (spindle speed)
● T (tool number)
● H (aux. function)
● D (tool offset number)
● DL (additive tool offset)
● F (feed)
Duration of validity
An overstored auxiliary function, e.g. M3 (spindle right), is valid until it is overwritten by another
auxiliary function from the same auxiliary function group, by additional overstoring or by
programming in a part program block.
8.13 Behavior during block search
8.13.1

Auxiliary function output during type 1, 2, and 4 block searches

Output behavior
In the case of type 1, 2, and 4 block searches, the auxiliary functions are collected on the basis
of specific groups. The last auxiliary function in each auxiliary function group is output after
NC-START in a separate part program block before the actual reentry block, and has the
following output behavior:
● Output duration of one OB1 cycle (normal acknowledgement)
● Output prior to motion
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions