Indexing Axes; Signals From Axis/Spindle (Db31 - Siemens SINUMERIK 840D sl Function Manual

NC/PLC interface signals (Z2)

19.16 Indexing axes

19.16 Indexing axes
19.16.1

Signals from axis/spindle (DB31, ...)

DB31, ...
DBX76.6 Indexing axis in position
Edge evaluation: No
Signal state 1 or The signal is influenced according to the "Exact stop fine":
edge change 0 → 1 When "Exact stop fine" is achieved, the signal is set.
When exiting "Exact stop fine", the signal is reset.
•
Note:
If the "Exact stop fine" window is reached and the indexing axis is positioned on an indexing
position, the signal is enabled regardless of how the indexing position was reached.
Signal state 0 or
•
edge change 1 → 0
•
•
•
•
Signal irrelevant for ... Axes that are not defined as indexing axes:
... MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB = 0
Application Tool magazine: Activation of a gripper for removing a tool from a magazine is triggered when the
example(s) indexing axis is in position:
DB31, ... DBX76.6 (indexing axis in position) = 1.
This must ensured by the PLC user program.
Special cases, errors, Notes:
... The axis positions entered in the indexing position table for the individual divisions can be changed
through zero offsets (including DRF).
The interface signal:
DB31, ... DBX76.6 (indexing axis in position)
is then set to 1 when the actual position of the indexing axis matches the value entered in the index
table plus the offset.
If a DRF is applied to an indexing axis in AUTOMATIC mode, then interface signal "Indexing axis in
position" remains active even though the axis is no longer at an indexing position.
Corresponding to .... MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB (axis is an indexing axis)
1072
Signal(s) updated: Cyclic
The indexing axis is located on an indexing position.
The indexing axis has been positioned with instructions for "Coded Position".
The axis is not defined as an indexing axis.
The indexing axis is traversing:
DB31, ... DBX64.7/64.6 (Travel command+/-) is active.
The indexing axis is located at a position which is not an indexing position.
Examples:
– In JOG mode after abortion of travel movement, e.g. with RESET
– in Automatic mode: indexing axis has, for example, approached a selected position
controlled by an AC or DC instruction
The indexing axis has not been positioned with instructions for coded positions (CAC, CACP,
CACN, CDC, CIC) in automatic mode.
The "Servo enable" signal for the indexing axis has been canceled:
DB31, ... DBX2.1 (Servo enable)
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions