Siemens SINUMERIK 802D sl, Руководство по эксплуатации функций, Страница: 152 / 462

Manual and Handwheel Travel (H1)
8.5 Fixed-point approach in JOG
Turning, Milling, Nibbling
152
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
8.5.4 Programming
System variables
The following system variables that can be read in the part program and in the synchronous
actions for the "Approach fixed point" function.
System variable Description
$AA_FIX_POINT_SELECTED [<Axis>] Number of fixed point to be approached
$AA_FIX_POINT_ACT [<Axis>] Number of the fixed point on which the axis is
currently located
8.5.5 Supplementary Conditions
Axis is indexing axis
The axis is not traversed and an alarm is output if the axis to be traversed is an indexing axis
and the fixed point position to be approached does not match an indexing position.
Frames active
All active frames are ignored. Traversing is performed in the machine coordinate system.
Offset values active
Active compensation values (external work offset, synchronized action offset $AA_OFF,
online tool offset) are also applied. The fixed point is a position in the machine coordinates
system.
An alarm is signaled if an offset movement (external work offset, synchronized action offset
$AA_OFF, online tool offset) is made during a fixed-point approach in JOG. The position of
the fixed point to be approached in the machine coordinates system is not reached; instead
a position that would have been reached without active offset movement is reached. The
NC/PLC interface signal "JOG - Approaching fixed point reached" (V390x 1001.3-5) is not
signaled.
Working-area limitations
Working-area limitations (in BCS and WCS) are considered and the axis motion is stopped
on reaching the limits.