Logix5000 Controllers General Instructions - SLAC Confluence

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224 Compare <strong>Instructions</strong> (CMP, EQU, GEQ, GRT, LEQ, LES, LIM, MEQ, NEQ)Less Than or Equal to (LEQ)The LEQ instruction tests whether Source A is less than or equal toSource B.Operands:Relay LadderOperand Type Format DescriptionSource ASINTimmediatevalue to test against Source BINTtagDINTREALstringSource BSINTimmediatevalue to test against Source AINTtagDINTREALstring• If you enter a SINT or INT tag, the value converts to a DINTvalue by sign-extension.• String data types are:– default STRING data type– any new string data type that you create• To test the characters of a string, enter a string tag for bothSource A and Source B.Structured TextIF sourceA
Compare <strong>Instructions</strong> (CMP, EQU, GEQ, GRT, LEQ, LES, LIM, MEQ, NEQ) 225Function BlockOperand Type Format DescriptionLEQ tag FBD_COMPARE structure LEQ structureFBD_COMPARE StructureInput Parameter Data Type DescriptionEnableIn BOOL Enable input. If cleared, the instruction does not execute and outputs are not updated.Default is set.SourceA REAL Value to test against SourceB.Valid = any floatSourceB REAL Value to test against SourceA.Valid = any floatOutput Parameter Data Type DescriptionEnableOut BOOL The instruction produced a valid result.Dest BOOL Result of the instruction. This is equivalent to rung-condition-out for the relay ladderLEQ instruction.Description:The LEQ instruction tests whether Source A is less than or equal toSource B.When you compare strings:• The hexadecimal values of the characters determine if one stringis less than or greater than another string. For the hex code of acharacter, see the back cover of this manual.• When the two strings are sorted as in a telephone directory, theorder of the strings determines which one is greater.ASCII CharactersHex Codes1ab $31$61$62lessergreater1b $31$62A $41AB $41$42B $42a $61AB < Ba > Bab $61$62Publication 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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274 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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636 Common AttributesInstructions e
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638 Common AttributesIf you use a S
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640 Common AttributesREAL to an int
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642 Function Block AttributesUse th
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644 Function Block AttributesOrder
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646 Function Block AttributesDo not
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648 Function Block AttributesCreate
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650 Function Block AttributesTiming
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652 Function Block AttributesCommon
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654 Function Block AttributesOvervi
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656 Function Block AttributesThe Pr
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658 Function Block AttributesProgra
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660 Structured Text ProgrammingTerm
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662 Structured Text ProgrammingThe
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664 Structured Text ProgrammingIn s
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666 Structured Text ProgrammingFor
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668 Structured Text ProgrammingUse
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670 Structured Text ProgrammingInst
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672 Structured Text ProgrammingIF..
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674 Structured Text ProgrammingExam
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676 Structured Text Programmingopti
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678 Structured Text ProgrammingFOR
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682 Structured Text ProgrammingThe
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684 Structured Text ProgrammingREPE
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688 Structured Text ProgrammingFor
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IndexAABL instruction 575ABS instru
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Index 693DEG 556FRD 565introduction
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Index 695sequencer 421serial port 5
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Index 697program/operator controlov
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Index 699timer on delay with reset
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Pub. Title/Type Logix5000 Controlle
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Rockwell AutomationSupportRockwell
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