Siemens SINUMERIK 840D sl Function Manual page 643

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Force Control (FOC)

System variables $AA_FOC, $VA_FOC

The meaning of system variable $AA_FOC is redefined for SERUPRO as follows:

• $AA_FOC represents the current status of program simulation.

• $VA_FOC always describes the real machine status.

The FOCREPOS function behaves analogously to the FXSREPOS function. The

functionality of FOC is repeated automatically with REPOS and is designated FOCREPOS.

Every axis is taken into account and the torque last programmed before the search target is

Boundary condition

A continuously changing torque characteristic cannot be implemented with FOC-REPOS.

A program moves axis X from 0 to 100 and activates FOC every 20 increments for 10

increments at a time. This torque characteristic is usually generated with nonmodal FOC and

cannot, therefore, be traced by FOCREPOS. FOCREPOS will traverse axis X from 0 to 100,

with or without FOC, according to the last programming.

For further information about the SERUPRO block search in relation to FXS or

References: /FB1/ Function Manual Basic Functions; Traversing to Fixed Stop (F1), General

Synchronous spindle

The synchronous spindle can be simulated.

The synchronous spindle operation with main spindle and any number of following spindles

can be simulated in all existing channels with SERUPRO.

For further information about synchronous spindles, see:

References: /FB2/ Function Manual, Extended Functions; Synchronous Spindle (S3)

Basic logic functions: Mode group, channel, program operation, reset response (K1)

Function Manual, 11/2006, 6FC5397-0BP10-2BA0

Detailed description

2.6 Block search Type 5 SERUPRO

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