Siemens SINUMERIK 840D sl Function Manual page 239

Effective
Effective
Ineffective
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 =
Functionality
Real-time-event path acceleration is set via the channel-specific system variables.
Parameter:
• Value range: Path acceleration ≥ 0
• Unit: m/s
Deactivation: $AC_PATHACC = 0
Application:
• Part program
• Static synchronized action
Basic logic functions: Acceleration (B2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.6 Path acceleration for real-time events (channel-specific)
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
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.
path acceleration
Path acceleration
2
Functions
21