Indexing Axes (T1); Signals From Axis/Spindle (Db31 - Siemens SINUMERIK 840D sl Function Manual

19.15

Indexing Axes (T1)

19.15.1

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

DB31, ...
DBX76.6 Indexing axis in position
Edge evaluation: No
Signal state 1 or edge The signal is influenced according to the "Exact stop fine":
change 0 → 1 When "Exact stop fine" is achieved, the signal is set.
When exiting "Exact stop fine", the signal is reset.
● The indexing axis is located on an indexing position.
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
● The axis is not defined as an indexing axis.
change 1 → 0
● The indexing axis is traversing:
● The indexing axis is located at a position which is not an indexing position.
● The indexing axis has not been positioned with instructions for coded positions (CAC, CACP, CACN,
● The "Servo enable" signal for the indexing axis has been canceled:
Signal irrelevant for ... ... Axes that are not defined as indexing axes:
MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB = 0
Application exam‐ Tool magazine: Activation of a gripper for removing a tool from a magazine is triggered when the
ple(s) indexing axis is in position:
DB31, ... DBX76.6 (indexing axis in position) = 1.
This must ensured by the PLC user program.
Special cases, er‐ Notes:
rors, ... 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)
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Signal(s) updated: Cyclic
The indexing axis has been positioned with instructions for "Coded Position".
DB31, ... DBX64.7/64.6 (Travel command+/-) is active.
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
CDC, CIC) in automatic mode.
DB31, ... DBX2.1 (Servo enable)
Z2: NC/PLC interface signals
19.15 Indexing Axes (T1)
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