Traversing Of Indexing Axes By Plc - Siemens SINUMERIK 840D sl Function Manual

With absolute positioning, the indexing position to be approached is programmed, and with
incremental positioning, the number of indexes to be traversed in the "+" or "-" direction is
programmed.
On rotary axes, the indexing position can be approached directly across the shortest path
(CDC) or with a defined direction of rotation (CACP, CACN).
Reaching the indexing position
If the "Exact stop fine" window is reached and the indexing axis is positioned on an indexing
position, the following NC/PLC interface signal is enabled regardless of how the indexing
position was reached.
DB31, ... DBX76.6 (indexing axis in position)
16.2.4

Traversing of indexing axes by PLC

Indexing axes can also be traversed from the PLC user program.
There are various methods:
● Concurrent positioning axes
● Asynchronous subroutines (ASUBs)
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
The indexing position to be approached can be specified by the PLC.
References:
/FB2/ Function Manual, Extended Functions; Positioning Axes (P2)
References:
/FB1/ Function Manual, Basic Functions; Mode Group, Channel, Program Operation,
Reset Response (K1)
Indexing Axes (T1)
16.2 Traversing of indexing axes
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