Logix5000 Controllers General Instructions - SLAC Confluence

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686 Structured Text ProgrammingExample 2:If You Want ThisMove ASCII characters from a SINT array into a string tag. (Ina SINT array, each element holds one character.) Stop whenyou reach the carriage return.1. Initialize Element_number to 0.2. Count the number of elements in SINT_array (array thatcontains the ASCII characters) and store the result inSINT_array_size (DINT tag).3. Set String_tag[element_number] = the character atSINT_array[element_number].4. Add 1 to element_number. This lets the controller checkthe next character in SINT_array.5. Set the Length member of String_tag = element_number.(This records the number of characters in String_tag sofar.)Enter This Structured Textelement_number := 0;SIZE(SINT_array, 0, SINT_array_size);RepeatString_tag.DATA[element_number] :=SINT_array[element_number];element_number := element_number + 1;String_tag.LEN := element_number;If element_number = SINT_array_size thenexit;end_if;Until SINT_array[element_number] = 13end_repeat;6. If element_number = SINT_array_size, then stop. (You areat the end of the array and it does not contain a carriagereturn.)7. If the character at SINT_array[element_number] = 13(decimal value of the carriage return), then stop.Otherwise, go to 3.Publication 1756-RM003I-EN-P - January 2007
Structured Text Programming 687CommentsTo make your structured text easier to interpret, add comments to it.• Comments let you use plain language to describe how yourstructured text works.• Comments do not affect the execution of the structured text.To add comments to your structured text:To Add A Commenton a single lineat the end of a line of structuredtextUse One Of These Formats//comment(*comment*)/*comment*/within a line of structured text(*comment*)/*comment*/that spans more than one line(*start of comment . . . end ofcomment*)/*start of comment . . . end ofcomment*/Publication 1756-RM003I-EN-P - January 2007
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Logix5000Controllers GeneralInstruc
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Table of ContentsSummary of Changes
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Table of Contents 7Extended Error C
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Table of Contents 9Array (File)/Mis
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Table of Contents 11Set the deadban
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14 Table of ContentsPublication 175
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16 Summary of ChangesNotes:Publicat
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18 PrefacePurpose of This ManualThi
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20 PrefaceRelay ladder rung conditi
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22 PrefaceNotes:Publication 1756-RM
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24 Instruction LocatorInstruction:
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30 Instruction LocatorPublication 1
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32 Digital Alarm Instruction (ALMD)
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48 Analog Alarm Instruction (ALMA)A
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50 Analog Alarm Instruction (ALMA)S
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52 Analog Alarm Instruction (ALMA)I
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54 Analog Alarm Instruction (ALMA)I
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56 Analog Alarm Instruction (ALMA)O
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62 Analog Alarm Instruction (ALMA)E
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64 Analog Alarm Instruction (ALMA)E
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70 Bit Instructions (XIC, XIO, OTE,
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96 Timer and Counter Instructions (
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98 Timer and Counter Instructions (
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100 Timer and Counter Instructions
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140 Input/Output Instructions (MSG,
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206 Compare Instructions (CMP, EQU,
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248 Compute/Math Instructions (CPT,
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284 Move/Logical Instructions (MOV,
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332 Array (File)/Misc. Instructions
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388 Array (File)/Shift Instructions
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422 Sequencer Instructions (SQI, SQ
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436 Program Control Instructions (J
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472 For/Break Instructions (FOR, FO
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480 Special Instructions (FBC, DDT,
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522 Trigonometric Instructions (SIN
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546 Advanced Math Instructions (LN,
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556 Math Conversion Instructions (D
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572 ASCII Serial Port Instructions
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606 ASCII String Instructions (CONC
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620 ASCII Conversion Instructions (
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Page 636 and 637: 636 Common AttributesInstructions e
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Page 691 and 692: IndexAABL instruction 575ABS instru
Page 693 and 694: Index 693DEG 556FRD 565introduction
Page 695 and 696: Index 695sequencer 421serial port 5
Page 697 and 698: Index 697program/operator controlov
Page 699 and 700: Index 699timer on delay with reset
Page 701 and 702: Pub. Title/Type Logix5000 Controlle
Page 705: Rockwell AutomationSupportRockwell
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