HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 21)

HEIDENHAIN TNC 640 21
8.1 Principle and Overview ..... 248
Programming notes ..... 249
Calling Q-parameter functions ..... 250
8.2 Part Families—Q Parameters in Place of Numerical Values ..... 251
Application ..... 251
8.3 Describing Contours through Mathematical Operations ..... 252
Application ..... 252
Overview ..... 252
Programming fundamental operations ..... 253
8.4 Trigonometric Functions ..... 254
Definitions ..... 254
Programming trigonometric functions ..... 255
8.5 Circle Calculations ..... 256
Application ..... 256
8.6 If-Then Decisions with Q Parameters ..... 257
Application ..... 257
Unconditional jumps ..... 257
Programming If-Then decisions ..... 257
Abbreviations used: ..... 258
8.7 Checking and Changing Q Parameters ..... 259
Procedure ..... 259
8.8 Additional Functions ..... 261
Overview ..... 261
FN 14: ERROR: Displaying error messages ..... 262
FN 16: F-PRINT: Formatted output of text and Q-parameter values ..... 267
FN 18: SYS-DATUM READ ..... 271
FN 19: PLC: Transfer values to the PLC ..... 280
FN 20: WAIT FOR: NC and PLC synchronization ..... 280
FN 29: PLC: Transfer values to the PLC ..... 282
FN37: EXPORT ..... 283
8.9 Accessing Tables with SQL Commands ..... 284
Introduction ..... 284
A Transaction ..... 285
Programming SQL commands ..... 287
Overview of the soft keys ..... 287
SQL BIND ..... 288
SQL SELECT ..... 289
SQL FETCH ..... 292
SQL UPDATE ..... 293
SQL INSERT ..... 293
SQL COMMIT ..... 294
SQL ROLLBACK ..... 294
8 Programming: Q Parameters ..... 247