HEIDENHAIN TNC 620 (73498x-01) - Manual (Page 21)

HEIDENHAIN TNC 620 21
8.1 Principle and overview ..... 236
Programming notes ..... 237
Calling Q-parameter functions ..... 238
8.2 Part families—Q parameters in place of numerical values ..... 239
Application ..... 239
8.3 Describing contours through mathematical operations ..... 240
Application ..... 240
Overview ..... 240
Programming fundamental operations ..... 241
8.4 Trigonometric functions ..... 242
Definitions ..... 242
Programming trigonometric functions ..... 243
8.5 Circle calculations ..... 244
Application ..... 244
8.6 If-then decisions with Q parameters ..... 245
Application ..... 245
Unconditional jumps ..... 245
Programming If-then decisions ..... 245
Abbreviations used: ..... 246
8.7 Checking and changing Q parameters ..... 247
Procedure ..... 247
8.8 Additional functions ..... 248
Overview ..... 248
FN 14: ERROR: Displaying error messages ..... 249
FN 16: F-PRINT: Formatted output of text and Q parameter values ..... 254
FN 18: SYS-DATUM READ ..... 258
FN 19: PLC: Transfer values to the PLC ..... 267
FN 20: WAIT FOR: NC and PLC synchronization ..... 267
FN 29: PLC: Transfer values to the PLC ..... 268
FN37: EXPORT ..... 269
8.9 Accessing tables with SQL commands ..... 270
Introduction ..... 270
A transaction ..... 271
Programming SQL commands ..... 273
Overview of the soft keys ..... 273
SQL BIND ..... 274
SQL SELECT ..... 275
SQL FETCH ..... 278
SQL UPDATE ..... 279
SQL INSERT ..... 279
SQL COMMIT ..... 280
SQL ROLLBACK ..... 280
8 Programming: Q parameters ..... 235