Efficient Networks S120 manual 265

Function modules 7.9 Basic positioner

When "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).

The "flying referencing" is activated by a 0/1 edge at binector input p2595 (start referencing). The signal in binector input p2595 (start homing) 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 (home 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 homed, status bit r2684.11 (reference point set) is set to "1".

●If the drive has already been homed, status bit r2684.11 (reference point set) is not reset when starting flying referencing.

●If the drive has already been homed and the position difference is less than the inner window (p2601), the old actual position value is retained.

●If the drive has already been homed and the position difference is more than the outer window (p2602), warning 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 absolute value of the position difference is greater than the inner window (p2601) and less the outer window (p2602), then the position actual value is corrected.

Note

Flying referencing is not an active operating mode. It is superimposed by an active operating mode.

In contrast to searches for reference, flying referencing can be carried out superimposed by the machine process.

As standard, for flying referencing, measuring probe evaluation is used; when enabled, the measuring probe is selected (p2510) and the edge evaluation (p2511) (in the factory setting, measuring probe 1 is always the measuring probe, flank evaluation in the factory setting is always the 0/1 edge).

Drive Functions	265
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4