HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 341)

4-216
TNC 407/TNC 415/TNC 425 13 Hirth coupling 01.98
Positioning on grid
L
M2051 ;manual operation mode
O M2052 ;electronic handwheel mode
AN M2 ;axis 4 not in grid spacing
A M2011 ;axis 4 in position
AN M2707 ;axis 4 PLC positioning not active
CMT 340 ;start PLC positioning axis on grid spacing
Grid not reached
L
M5 ;controlled operation mode
AN M2 ;axis 4 not in grid spacing
AN M2011 ;axis 4 not in position
S M3023 ;PLC error message: error on "Automatic" mode
A M2 ;axis 4 in grid
A M2011 ;axis 4 not in position
R M3023 ;PLC error message reset
EM
LBL
330 Adjacent grid spacing relate to nominal axis position
PS K + 8 ;target address
PS K + 3 ;trailing error
CM 9041 ;upload coordinate value
PS K + 0 ;target address
PS K + 2 ;REF value
CM 9041 ;upload coordinate value
Calculate left and right grid
L
D12 ;REF value axis 4
+ D20 ;trailing error axis 4
= D44 ;nominal grid value
Left grid
L
D44
PSW ;load to stack
< K + 0
CMT 331 ;decrement by Hirth grid
PLW ;load to ACCU
/ D28
x D28 ;suppress residual spacing
= D36 ;left grid point
Right grid
L
D36
+ D28
= D40 ;right grid point
Save direction of traverse
L
M2163 ;direction of traverse axis V
= M3 ;save to buffered marker
EM