Path Tangent Angle ($Ac_Taneb); Override ($A - Siemens SINUMERIK 828D Function Manual

Detailed description
2.3 System variables for synchronized actions
2.3.10

Path tangent angle ($AC_TANEB)

The angle between the tangent at the end point of the current block and the tangent at the
start point of the following block can be read via the channel-specific system variable
$AC_TANEB (Tangent ANgle at End of Block).
Data type:
The tangent angle is always specified positive in the range 0.0 to 180.0°.
If the tangent angle cannot be determined, the value -180.0° is output.
Used only with programmed blocks
It is recommended that the tangent angle only be read for programmed blocks, not for
intermediate blocks generated by the system. A distinction can be made via the system
variable $AC_BLOCKTYPE:
$AC_BLOCKTYPE == 0 (programmed block)
Example:
Program code
ID=2 EVERY $AC_BLOCKTYPE==0 DO $R1=$AC_TANEB
2.3.11 Override ($A...OVR)
Current override
Channel-specific override
The path feedrate can be changed via the channel-specific system variable $AC_OVR.
Data type:
Unit:
Range of
values:
The system variable $AC_OVR must be written in every interpolation cycle, otherwise the
value "100%" is effective.
34
REAL
REAL
%
0.0 to machine data
• For binary-coded override switch
MD12100 $MN_OVR_FACTOR_LIMIT_BIN
• For gray-coded override switch
MD12030 $MN_OVR_FACTOR_FEEDRATE[30]
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
Synchronized actions