Siemens Sinumerik 840D sl Programming Manual page 7

Table of contents
Preface.........................................................................................................................................................3
1 Flexible NC programming .........................................................................................................................17
1.1 Variables.................................................................................................................................... 17
1.1.1 General information about variables .......................................................................................... 17
1.1.2 System variables ....................................................................................................................... 18
1.1.3 Predefined user variables: Arithmetic parameters (R) ............................................................... 21
1.1.4 Predefined user variables: Link variables .................................................................................. 23
1.1.5 Definition of user variables (DEF) .............................................................................................. 25
1.1.6 Redefinition of system variables, user variables, and NC language commands (REDEF) ....... 31
1.1.7 Attribute: Initialization value ....................................................................................................... 34
1.1.8 Attribute: Limit values (LLI, ULI) ................................................................................................ 37
1.1.9 Attribute: Physical unit (PHU) .................................................................................................... 39
1.1.10 Attribute: Access rights (APR, APW, APRP, APWP, APRB, APWB) ........................................ 41
1.1.11 Overview of definable and redefinable attributes ...................................................................... 46
1.1.12 Definition and initialization of array variables (DEF, SET, REP) ............................................... 47
1.1.13 Definition and initialization of array variables (DEF, SET, REP): Further Information .............. 52
1.1.14 Data types ................................................................................................................................. 55
1.2 Indirect programming................................................................................................................. 56
1.2.1 Indirectly programming addresses ............................................................................................ 56
1.2.2 Indirectly programming G codes ................................................................................................ 59
1.2.3 Indirectly programming position attributes (BP) ......................................................................... 60
1.2.4 Indirectly programming part program lines (EXECSTRING) ..................................................... 63
1.3 Arithmetic functions ................................................................................................................... 64
1.4 Comparison and logic operations .............................................................................................. 67
1.5 Precision correction on comparison errors (TRUNC) ................................................................ 69
1.6 Variable minimum, maximum and range (MINVAL, MAXVAL and BOUND)............................. 71
1.7 Priority of the operations............................................................................................................ 73
1.8 Possible type conversions ......................................................................................................... 74
1.9 String operations ....................................................................................................................... 75
1.9.1 Type conversion to STRING (AXSTRING) ................................................................................ 76
1.9.2 Type conversion from STRING (NUMBER, ISNUMBER, AXNAME) ........................................ 77
1.9.3 Concatenation of strings (<<) .................................................................................................... 78
1.9.4 Conversion to lower/upper case letters (TOLOWER, TOUPPER) ............................................ 79
1.9.5 Determine length of string (STRLEN) ........................................................................................ 80
1.9.6 Search for character/string in the string (INDEX, RINDEX, MINDEX, MATCH) ........................ 81
1.9.7 Selection of a substring (SUBSTR) ........................................................................................... 82
1.9.8 Selection of a single character (STRINGVAR, STRINGFELD) ................................................. 83
1.9.9 Formatting a string (SPRINT) .................................................................................................... 84
1.10 Program jumps and branches ................................................................................................... 93
1.10.1 Return jump to the start of the program (GOTOS) .................................................................... 93
1.10.2 Program jumps to jump markers (GOTOB, GOTOF, GOTO, GOTOC) .................................... 94
1.10.3 Program branch (CASE ... OF ... DEFAULT ...) ........................................................................ 97
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Programming Manual 02/2011, 6FC5398-2BP40-1BA0
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