Siemens SINUMERIK 840Di Function Manual page 1467

Basic machine

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Phase 2: Travel to fixed stop

Phase 2: Start

Phase 2 is automatically started when phase 1 has been completed without an alarm.

Initial situation:

• The machine axis is positioned directly behind the last of the parameterized number of

• The actual value system of the machine axis is synchronized.

Phase 2: Sequence

In Phase 2, the machine axis completes reference point approach by traversing to a defined

target position (reference point). This action can be suppressed in order to shorten the

reference point approach:

MD34330 $MA_STOP_AT_ABS_MARKER =

Mode = 0: Travel to target position (normal case)

The machine axis accelerates to the assigned reference point positioning velocity:

MD34070 $MA_REFP_VELO_POS

and moves to the assigned end point (reference point):

MD34100 $MA_REFP_SET_POS (reference point value).

The machine axis is referenced. To identify this, the NC sets an interface signal for the

measuring system that is currently active:

DB31, ... DBB60.4/60.5 (referenced/synchronized 1/2) = 1

Mode = 1: No travel to target position

The machine axis is now referenced. To identify this, the NC sets an interface signal for the

measuring system that is currently active:

DB31, ... DBB60.4/60.5 (referenced/synchronized 1/2) = 1

Reference Point Approach (R1)

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

reference marks.

Travel to target position

No travel to target position

2.5 Referencing with distance-coded reference marks

Detailed Description

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