HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 299)

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TNC 407/TNC 415/TNC 425 8 Key-simulation 01.98
8.2 Machine-control panel
A manufacturer's specific machine-control panel can be connected to the HEIDENHAIN contouring
controls. See under "Assembly and electrical installation".
25 PLC inputs (I 128 to I 152) and 8 PLC outputs (O 0 to O 7) are available on the female connector
X46 for the evaluation of the keys on the machine-control panel. The evaluation of the signals from
the machine-control panel must be performed in the PLC-program. The appropriate markers will be
set thereby. For safety reasons a complement-marker must be reset when some functions are
activated. This is especially so for keys with several contacts. If the complement-marker is not
properly set or reset, the flashing error message "Error in PLC-program" will appear. The displayed
code identifies the marker where the error has occurred.
An axis-direction key which has been operated can be stored by marker M2450 (Complement-
marker M2466) . This means that the axis will be traversed until NC STOP occurs. This memory
function must be activated by machine parameter MP7680 Bit 0.
MP7680 - Machine parameter with multiple-function
Bit 0 - Memory function for axis-direction keys 0 = Not stored
1 = Stored
Marker Function Error
message Set Reset
M2448 NC-start (edge evaluation) 1A PLC PLC
M2464 Complement NC-start
M2449 Rapid traverse 1B
M2465 Complement - rapid traverse
M2488 NC-stop ("0" signifies stop)
M2450 Memory function for axis-direction keys 1C
M2466 Complement - memory function for
axis-direction keys
M2451 Feed-release 1D
M2467 Complement - feed-release
M2456 Manual traverse X+ 1I
M2472 Complement - manual traverse X+
M2457 Manual traverse X- 1J
M2473 Complement - manual traverse X-
M2458 Manual traverse Y+ 1K
M2474 Complement - manual traverse Y+
M2459 Manual traverse Y- 1L
M2475 Complement - manual traverse Y-