HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 18)

18
8.1 Principle and overview ..... 180
Programming notes ..... 181
Calling Q-parameter functions ..... 182
8.2 Part families—Q parameters in place of numerical values ..... 183
Application ..... 183
8.3 Describing contours through mathematical operations ..... 184
Application ..... 184
Overview ..... 184
Programming fundamental operations ..... 185
8.4 Trigonometric functions ..... 186
Definitions ..... 186
Programming trigonometric functions ..... 187
8.5 Circle calculations ..... 188
Application ..... 188
8.6 If-then decisions with Q parameters ..... 189
Application ..... 189
Unconditional jumps ..... 189
Programming if-then decisions ..... 190
Abbreviations used: ..... 190
8.7 Checking and changing Q parameters ..... 191
Procedure ..... 191
8.8 Additional functions ..... 192
Overview ..... 192
FN 14: ERROR: Display error messages ..... 193
FN 16: F-PRINT: Formatted output of text and Q-parameter values ..... 198
FN 18: SYS-DATUM READ ..... 202
FN 19: PLC: Transfer values to the PLC ..... 211
FN 20: WAIT FOR: NC and PLC synchronization ..... 211
FN 29: PLC: Transfer values to the PLC ..... 213
FN 37: EXPORT ..... 214
8.9 Accessing tables with SQL commands ..... 215
Introduction ..... 215
A transaction ..... 216
Programming SQL commands ..... 218
Overview of the soft keys ..... 218
SQL BIND ..... 219
SQL SELECT ..... 220
SQL FETCH ..... 223
SQL UPDATE ..... 224
SQL INSERT ..... 224
SQL COMMIT ..... 225
SQL ROLLBACK ..... 225
8 Programming: Q parameters ..... 179