Siemens Sinumerik 840D sl Programming Manual page 119

Syntax
ACC:
<axis>:
SPI(<n>)/S<n>:
<value>:
Note
With a greater acceleration rate, the values permitted by the manufacturer may be exceeded.
Example
Program code
N50 ACC[X]=80
N60 ACC[SPI(1)]=50
Further information
Acceleration override programmed with ACC
The acceleration override programmed with ACC[...] is always taken into consideration on
output as in system variable $AA_ACC. Readout in the parts program and in synchronized
actions takes place at different times in the NC processing run.
In the part program
The value written in the part program is then only taken into consideration in system variable
$AA_ACC as written in the part program if ACC has not been changed in the meantime by a
synchronized action.
In synchronized actions
The following thus applies: The value written to a synchronized action is then only considered
in system variable $AA_ACC as written to the synchronized action if ACC has not been changed
in the meantime by a part program.
The preset acceleration can also be changed via synchronized actions (see Function Manual,
Synchronized Actions).
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
8.7 Programmable acceleration override (ACC) (option)
Acceleration change for the specified path axis or speed change for the
specified spindle.
Channel axis name of path axis
Spindle identifier
SPI(<n>) and S<n> are identical in terms of function.
Spindle number
<n>:
Note:
SPI converts spindle numbers into axis identifiers. The transfer parameter
(<n>) must contain a valid spindle number.
Acceleration change in percent
The value refers to or is combined with the feedrate override set on the
machine control panel.
Range of values: 1 to 200%, integers
Comment
; The axis slide in the X direction should only be trav-
ersed with 80% acceleration.
; Spindle 1 should only accelerate or brake with 50% of
the acceleration capacity.
Feed control
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