HEIDENHAIN TNC 320 (340 55x-04) ISO programming - Manual (Page 20)

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8.1 Principle and Overview ..... 196
Programming notes ..... 198
Calling Q-parameter functions ..... 199
8.2 Part Families—Q Parameters in Place of Numerical Values ..... 200
Function ..... 200
8.3 Describing Contours through Mathematical Operations ..... 201
Application ..... 201
Overview ..... 201
Programming fundamental operations ..... 202
8.4 Trigonometric Functions ..... 203
Definitions ..... 203
Programming trigonometric functions ..... 204
8.5 If-Then Decisions with Q Parameters ..... 205
Application ..... 205
Unconditional jumps ..... 205
Programming If-Then decisions ..... 205
8.6 Checking and Changing Q Parameters ..... 206
Procedure ..... 206
8.7 Additional Functions ..... 207
Overview ..... 207
D14: ERROR: Displaying error messages ..... 208
D18: Read system data ..... 213
D19 PLC: Transfer values to the PLC ..... 221
8.8 Accessing Tables with SQL Commands ..... 222
Introduction ..... 222
A Transaction ..... 223
Programming SQL commands ..... 225
Overview of the soft keys ..... 225
SQL BIND ..... 226
SQL SELECT ..... 227
SQL FETCH ..... 230
SQL UPDATE ..... 231
SQL INSERT ..... 231
SQL COMMIT ..... 232
SQL ROLLBACK ..... 232
8.9 Entering Formulas Directly ..... 233
Entering formulas ..... 233
Rules for formulas ..... 235
Programming example ..... 236
8 Programming: Q Parameters ..... 195