Force Control (Foc); Synchronous Spindle - Siemens SINUMERIK 828D Function Manual

9.8.8.2

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 applied.
Boundary condition
A continuously changing torque characteristic cannot be implemented with FOC-REPOS.
Example:
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.
Note
For further information about the SERUPRO block search in relation to FXS or
FOC, see
References: /FB1/ Function Manual Basic Functions; Traversing to Fixed Stop (F1), General
Functions
9.8.8.3

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 Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
K1: Mode group, channel, program operation, reset response
9.8 Block search Type 5 SERUPRO
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