HEIDENHAIN TNC 306 Technical Manual - Manual (Page 508)

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TNC406/TNC 306 Update Information No. 11
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The coordinate system is first shifted in X/Y/Z and then rotated about the Z axis. The rotation
results in an automatic shift in C.
The control takes the data for the two blocks from the PLC. When EL CALL or WP CALL is
executed the programmed name and an identifier are transferred to the PLC. Then the NC sets
the S strobe (M2044). The PLC can then decide which of the two blocks is to be executed in
order to operate an EWIS robot system, for example. After the electrode, workpiece or pallet has
been changed, the data of the electrode or workpiece must be available in the PLC in the word
markers starting with D628. Then the acknowledgment marker M2481 must be set in the PLC
for a PLC scan. The NC takes the EL CALL and WP CALL data from the PLC and resets the
strobe M2044. Now the corresponding calculations are made (compensation/shift/rotation) and
executed. The datum-shift data of the workpiece are always relative to pallet datum, which must
agree with the manual preset.
It is recommended that after an EL CALL/TOOL CALL with a block L X... Y... C... the
electrode be moved to a compensated position for further machining, since the electrode
shifting movements are rotated depending on the C position. This means that for all erosion
processes in which the electrode must move in the proper direction, the compensated C
position must first have been reached.
Marker assignment:
M2044
S strobe (special function EL CALL, WP CALL set/reset NC)
M2481 Reset S strobe (set/reset PLC)
B600 ... B623 Data NC --> PLC
B600 Identifier: 1 = EL CALL, 2 = WP CALL
B601 ... B603 Free
B604 ... B619 16-byte ASCII string EL name or WP Name
B620 Number of tilts for identifier 2
B621 ... B623 Free
B624 ... B655 Data PLC --> NC
B624 ... B627 Free
B628 ... B651 Data for identifier 1 (EL CALL) or identifier 2 (WP CALL)
Identifier 1:
Identifier 2:
D628 Compensation X Shift X
D632 Compensation Y Shift Y
D636 Compensation Z Shift Z
D640 Compensation C Rotation C
D644 Undersize
D648 Radius
B652 ... B655 Free
• FN14
With numbers 300...499, PLC dialogs 0 to 199 are accessed during FN 14 (PLC error messages).
FN14: ERROR = 0..299
Display: "FN14: ERROR CODE 0...299"
FN14: ERROR = 300..499 Display: Text from PLC chip
• FN15
With numbers 0...199, PLC dialogs 0...199 are accessed during FN 15 (PLC error messages).
FN15: PRINT 0..199
Output to RS-232: Text from PLC chip
FN15: PRINT 200 Output to RS-232: special character ETX
FN15: PRINT Q1..Q255 Output to RS-232: content of the Q parameter