HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 480)

01.98
TNC 407/TNC 415/TNC 425 2 Program creation 7-19
Markers M1000 to M1999 and Bytes B0 to B127 are non-volatile, i.e. the contents of this memory
are maintained when the supply voltage is switched off.
After entry of the code number 531 210 the markers M1000 to M1999 and Bytes B0 to B127 are
erased.
B0 to B127 Freely available, not deleted with RESET
B128 to B255 Freely available, deleted with RESET
B256 to B511 Data transfer NC
→
PLC
B512 to B767 Data transfer PLC
→
NC
B768 to B1023 Machine parameters
2.3 Data transfer NC/PLC
The information exchange between PLC and NC is conducted by markers, Bytes, Words and
Doublewords. The function of the individual markers, Bytes, Words and Doublewords is fixed.
Either numerical data or general data (controlled by strobes) can be transferred.
2.3.1 Number transfer
The Parameter function FN19 can be used to transfer two numbers to the PLC. The transferred
values are deposited in the Doublewords D280 and D284.
During the transfer the marker M2149 is set by the NC. The transfer must be confirmed by the PLC
by setting marker M2611.
Marker M2150 determines whether dimensions are in mm or inches.
The transferred value is deposited as an integer number in units of 1/10 000.
Marker Function Set Reset
M2149 Transfer with FN19 active NC NC
M2611 Confirm the transfer with FN19 PLC PLC
M2150 Dimensional unit for transfer with FN19
0 = mm; 1 = inch NC NC
Address Function
D 280 1st Number value from FN 19
D 284 2nd Number value from FN 19