String processing functions..................................................................................................................................... 311

Assigning string parameters....................................................................................................................................312

Chain-linking string parameters.............................................................................................................................. 313

Converting a numerical value to a string parameter..........................................................................................314

Copying a substring from a string parameter..................................................................................................... 315

Reading system data.................................................................................................................................................316

Converting a string parameter to a numerical value..........................................................................................317

Testing a string parameter.......................................................................................................................................318

Finding the length of a string parameter.............................................................................................................. 319

Comparing alphabetic priority................................................................................................................................. 320

Reading out machine parameters.......................................................................................................................... 321

9.11 Preassigned Q parameters............................................................................................................. 324

Values from the PLC: Q100 to Q107..................................................................................................................... 324

Active tool radius: Q108............................................................................................................................................324

Tool axis: Q109........................................................................................................................................................... 325

Spindle status: Q110..................................................................................................................................................325

Coolant on/off: Q111................................................................................................................................................. 325

Overlap factor: Q112..................................................................................................................................................325

Unit of measurement for dimensions in the NC program: Q113..................................................................... 325

Tool length: Q114....................................................................................................................................................... 326

Coordinates after probing during program run................................................................................................... 326

Deviation between actual and nominal value during automatic tool measurement; for example, with the

TT 160...........................................................................................................................................................................326

Tilting the working plane with workpiece angles: Coordinates calculated by the control for rotary

axes................................................................................................................................................................................326

Measurement results from touch probe cycles.................................................................................................. 327

9.12 Accessing tables with SQL statements.......................................................................................... 330

Introduction..................................................................................................................................................................330

Programming SQL commands................................................................................................................................332

Overview of functions................................................................................................................................................333

SQL BIND......................................................................................................................................................................334

SQL EXECUTE..............................................................................................................................................................335

SQL FETCH.................................................................................................................................................................. 339

SQL UPDATE................................................................................................................................................................341

SQL INSERT................................................................................................................................................................. 343

SQL COMMIT...............................................................................................................................................................344

SQL ROLLBACK...........................................................................................................................................................345

SQL SELECT.................................................................................................................................................................347

Examples...................................................................................................................................................................... 349

9.13 Programming examples..................................................................................................................351

Example: Rounding a value......................................................................................................................................351

Example: Ellipse.......................................................................................................................................................... 352

HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022

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