Traversing Of Indexing Axes; General Information; Traversing Of Indexing Axes In The Jog Mode - Siemens SINUMERIK 840D sl Function Manual

T1: Indexing axes

16.2 Traversing of indexing axes

16.2 Traversing of indexing axes
16.2
16.2.1

General information

Indexing axes can be traversed:
● Manually in the setting-up modes JOG and INC
● from one part program with special instructions for coded positions
● of PLC
Upon reaching the indexing position the following interface signal is given out to the PLC:
DB31, ... DBX76.6 (indexing axis in position)
Note
Hirth indexing axes cannot be traversed in JOG mode before reference point approach.
16.2.2

Traversing of indexing axes in the JOG mode

Reference point approach
An indexing axis approaches the reference point in the same way as other axes. The
reference point does not have to coincide with an indexing position.
When reference point is reached:
DB31, ... DBX60.4 or 5 (referenced/synchronized 1 or 2) = 1
the indexing axis moves only to indexing positions in JOG mode during conventional and
incremental traversing.
Exception: No indexing positions are approached when traversing with the handwheel.
If the axis is not referenced (DB31, ... DBX60.4 or 5 = 0), the indexing positions are ignored
when traversing in JOG mode!
Continuous traversal in JOG
● Jog mode active:
● Continuous mode active:
942
SD41050 $SN_JOG_CONT_MODE_LEVELTRIGGRD = 1
Pressing a "+" or "-" traversing key causes the indexing axis to move in the same way as
with conventional JOG traversing. When the traversing key is released, the indexing axis
traverses to the next indexing position in the direction of traversing.
SD41040 $SN_JOG_CONT_MODE_LEVELTRIGGRD = 0
Pressing the traversing key briefly (first rising signal edge) starts the traversing movement
of the indexing axis in the desired direction. Traversing continues when the traversing key
is released. When the traversing key is pressed again (second rising signal edge), the
indexing axis traverses to the next indexing position in the direction of traversing.
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions