Siemens SINUMERIK 840D sl Programming Manual page 7

Table of contents
Preface ...................................................................................................................................................... 3
1 Flexible NC programming ........................................................................................................................ 15
1.1 Variables ......................................................................................................................................15
1.1.1 General information about variables............................................................................................15
1.1.2 System variables..........................................................................................................................16
1.1.3 Predefined user variables: Arithmetic parameters (R).................................................................19
1.1.4 Predefined user variables: Link variables ....................................................................................21
1.1.5 Definition of user variables (DEF) ................................................................................................24
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)...................................................................................................38
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.........................................................................47
1.1.12 Definition and initialization of array variables (DEF, SET, REP) .................................................48
1.1.13 Data types ....................................................................................................................................57
1.2 Indirect programming ...................................................................................................................58
1.2.1 Indirectly programming G codes ..................................................................................................62
1.2.2 Indirectly programming position attributes (BP)...........................................................................63
1.2.3 Indirectly programming part program lines (EXECSTRING) .......................................................66
1.3 Arithmetic functions......................................................................................................................67
1.4 Comparison and logic operations ................................................................................................70
1.5 Precision correction on comparison errors (TRUNC) ..................................................................73
1.6 Variable minimum, maximum and range (MINVAL, MAXVAL and BOUND) ..............................75
1.7 Priority of the operations ..............................................................................................................77
1.8 Possible type conversions ...........................................................................................................78
1.9 String operations..........................................................................................................................79
1.9.1 Type conversion to STRING (AXSTRING) ..................................................................................80
1.9.2 Type conversion from STRING (NUMBER, ISNUMBER, AXNAME) ..........................................81
1.9.3 Concatenation of strings (<<).......................................................................................................83
1.9.4 Conversion to lower/upper case letters (TOLOWER, TOUPPER) ..............................................85
1.9.5 Determine length of string (STRLEN) ..........................................................................................86
1.9.6 Search for character/string in the string (INDEX, RINDEX, MINDEX, MATCH)..........................87
1.9.7 Selection of a substring (SUBSTR) .............................................................................................89
1.9.8 Selection of a single character (STRINGVAR, STRINGFELD) ...................................................90
1.10 Program jumps and branches......................................................................................................92
1.10.1 Return jump to the start of the program (GOTOS) ......................................................................92
1.10.2 Program jumps to jump markers (GOTOB, GOTOF, GOTO, GOTOC) ......................................93
1.10.3 Program branch (CASE ... OF ... DEFAULT ...) ..........................................................................97
1.11 Repeat program section (REPEAT, REPEATB, ENDLABEL, P) ................................................99
1.12 Check structures ........................................................................................................................107
1.12.1 Program loop with alternative (IF, ELSE, ENDIF)......................................................................109
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Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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