Velocity Edge GX440 Instructions d'exploitation télécharger pdf (Page 386)

Functions, monitoring, and protective functions

9.4 Extended functions

Drive converter cabinet units

386 Operating Instructions, 10/2008, A5E00288214A

Flying referencing

The "on-the-fly referencing" mode (also known as post-referencing), which is selected using

a "1" signal at binector input p2597 (select referencing type), can be used in every mode

(jogging, traversing block and direct setpoint input for positioning/setup) and is superimposed

on the currently active mode. Flying referencing can be selected both with incremental and

absolute measuring systems.

With "flying referencing" during incremental positioning (relative), you can select whether the

offset value is to be taken into account for the travel path or not (p2603).

"Flying referencing" is activated by a 0/1 edge at binector input p2595 (start referencing).

The signal in binector input p2595 (start referencing) must be set during the entire

referencing process otherwise the process is aborted.

Status bit r2684.1 (passive/flying referencing active) is linked with binector input p2509

(activate measurement probe evaluation). It activates measurement probe evaluation.

Binector inputs p2510 (measurement probe selection) and p2511 (measurement probe edge

evaluation) can be used to set which measurement probe (1 or 2) and which measurement

edge (0/1 or 1/0) is to be used.

The measurement probe pulse is used to supply connector input p2660 (referencing

measurement value) with the measurement via parameter r2523. The validity of the

measurement is reported to binector input p2661 (measurement valid feedback) via r2526.2.

Note

The following must always apply to the "Flying referencing mode" windows:

p2602 (outer window) > p2601 (inner window).

See function diagram 3614 for more information on the "Flying referencing mode" function.

The following then happens:

● If the drive has not yet been referenced, status bit r2684.11 (reference point set) is set to

"1".

● If the drive has already been referenced, status bit r2684.11 (reference point set) is not

reset when starting flying referencing.

● If the drive has already been referenced and the position difference is less than the inner

window (p2601), the old actual position value is retained.

● If the drive has already been referenced and the position difference is more than the

outer window (p2602), alarm A07489 (reference point offset outside window 2) is output

and the status bit r2684.3 (pressure mark outside window 2) set. No offset to the actual

position value is undertaken.

● If the drive has already been referenced and the position difference is more than the inner

window (p2601) and less that the outer window (p2602), the actual position value is

offset.

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Velocity Edge GX440 Instructions d'exploitation Page 386