Siemens SINUMERIK 840D sl, Function Manual

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Functions
2.6 Path acceleration for real-time events (channel-specific)
Basic logic functions: Acceleration (B2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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Effective
Effective Real-time event acceleration is only enabled in AUTOMATIC and MDA operating
modes in conjunction with the following real-time events:
•
NC-STOP/NC-START
•
Override modifications
•
Modification of the velocity default for "safely reduced velocity" within the context
of the "Safely Integrated" function
Ineffective Path acceleration for real-time events is ineffective for changes in path velocity that
are attributable to path planning during preprocessing for the channel, such as
contour curvatures, corners, kinematic transformation limitations, etc.
Real-time-event path acceleration is ineffective if the programmed value is smaller
than the path acceleration calculated during preprocessing for the path section
concerned.
Programming
For information about programming system variables in the part program or synchronized
actions, see Chapter: Programming.
2.6.2 Activation
Start-up (commissioning)
The function does not need to be activated.
2.6.3 Programming
Syntax
$AC_PATHACC =
path acceleration
Functionality
Real-time-event path acceleration is set via the channel-specific system variables.
Parameter:
Path acceleration
•
Value range: Path acceleration ≥ 0
•
Unit: m/s
2
Deactivation:
$AC_PATHACC = 0
Application:
•
Part program
•
Static synchronized action