HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 20)

20
8.1 Principle and Overview ..... 220
Programming notes ..... 221
Calling Q-parameter functions ..... 222
8.2 Part Families—Q Parameters in Place of Numerical Values ..... 223
Application ..... 223
8.3 Describing Contours through Mathematical Operations ..... 224
Application ..... 224
Overview ..... 224
Programming fundamental operations ..... 225
8.4 Trigonometric Functions ..... 226
Definitions ..... 226
Programming trigonometric functions ..... 227
8.5 If-Then Decisions with Q Parameters ..... 228
Application ..... 228
Unconditional jumps ..... 228
Programming If-Then decisions ..... 228
8.6 Checking and Changing Q Parameters ..... 229
Procedure ..... 229
8.7 Additional Functions ..... 231
Overview ..... 231
D14: ERROR: Displaying error messages ..... 232
D18: Read system data ..... 236
D19 PLC: Transfer values to the PLC ..... 245
D20 WAIT FOR: NC and PLC synchronization ..... 245
D29: Transfer values to the PLC ..... 247
D37 EXPORT ..... 248
8.8 Accessing Tables with SQL Commands ..... 249
Introduction ..... 249
A Transaction ..... 250
Programming SQL commands ..... 252
Overview of the soft keys ..... 252
SQL BIND ..... 253
SQL SELECT ..... 254
SQL FETCH ..... 257
SQL UPDATE ..... 258
SQL INSERT ..... 258
SQL COMMIT ..... 259
SQL ROLLBACK ..... 259
8.9 Entering Formulas Directly ..... 260
Entering formulas ..... 260
Rules for formulas ..... 262
Programming example ..... 263
8 Programming: Q Parameters ..... 219