Statement List (STL) - DCE FEL ČVUT v Praze

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Conversion Instructions 3.18 RND- Round to Lower Double Integer Format Description Status word Example RND- RND- (conversion of a 32-bit IEEE floating-point number to 32-bit integer) interprets the contents of ACCU 1 as 32-bit IEEE floating-point number. The instruction converts the 32-bit IEEE floating-point number to a 32-bit integer (double integer) and rounds the result to the largest whole number less than or equal to the floating-point number that is converted (IEEE rounding mode "round to -infinity"). If the number is out of the permissible range, then the status bits OV and OS are set to 1. The result is stored in accumulator 1. Conversion is not performed and an overflow indicated in the event of a fault (utilization of a NaN or a floating-point number that cannot be represented as a 32-bit integer number.) BR CC 1 CC 0 OV OS OR STA RLO /FC writes: - - - x x - - - - STL Explanation L MD10 //Load the floating-point number into ACCU 1-L. RND- //Convert the floating-point number (32-bit, IEEE-FP) to an integer (32-bit) and round result. Store result in ACCU 1. T MD20 //Transfer result (double integer number) to MD20. Value before conversion Value after conversion MD10 = "100.5" => RND- => MD20 = "+100" MD10 = "-100.5" => RND- => MD20 = "-100" Statement List (STL) for S7-300 and S7-400 Programming 3-18 A5E00706960-01
4 Counter Instructions 4.1 Overview of Counter Instructions Description A counter is a function element of the STEP 7 programming language that acounts. Counters have an area reserved for them in the memory of your CPU. This memory area reserves one 16-bit word for each counter. The statement list instruction set supports 256 counters. To find out how many counters are available in your CPU, please refer to the CPU technical data. Counter instructions are the only functions with access to the memory area. You can vary the count value within this range by using the following Counter instructions: • FR Enable Counter (Free) • L Load Current Counter Value into ACCU 1 • LC Load Current Counter Value into ACCU 1 as BCD • R Reset Counter • S Set Counter Preset Value • CU Counter Up • CD Counter Down Statement List (STL) for S7-300 and S7-400 Programming A5E00706960-01 4-1
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s SIMATIC Statement List (STL) for
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Preface Purpose This manual is your
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Preface Online Help The manual is c
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Contents 1 Bit Logic Instructions 1
Page 9 and 10: Contents 8 Floating-Point Math Inst
Page 11 and 12: Contents 14 Accumulator Instruction
Page 13 and 14: 1 Bit Logic Instructions 1.1 Overvi
Page 15 and 16: 1.2 A And Format A Address Data ty
Page 17 and 18: 1.4 O Or Format O Address Data typ
Page 19 and 20: 1.6 X Exclusive Or Format X Addres
Page 21 and 22: 1.8 O And before Or Format Descript
Page 23 and 24: 1.10 AN( And Not with Nesting Open
Page 25 and 26: 1.14 XN( Exclusive Or Not with Nest
Page 27 and 28: Example Statement List Program A( O
Page 29 and 30: 1.17 R Reset Format R Address Data
Page 31 and 32: 1.19 NOT Negate RLO Format Descript
Page 33 and 34: 1.21 CLR Clear RLO (=0) Format Desc
Page 35 and 36: 1.23 FN Edge Negative Format FN Bi
Page 37 and 38: 1.24 FP Edge Positive Format FP Bi
Page 39 and 40: 2 Comparison Instructions 2.1 Overv
Page 41 and 42: 2.3 ? D Compare Double Integer (32-
Page 43 and 44: 3 Conversion Instructions 3.1 Overv
Page 45 and 46: 3.3 ITB Integer (16-Bit) to BCD For
Page 47 and 48: 3.5 ITD Integer (16 Bit) to Double
Page 49 and 50: Conversion Instructions 3.7 DTR Dou
Page 51 and 52: Conversion Instructions 3.9 INVD On
Page 53 and 54: Conversion Instructions 3.11 NEGD T
Page 55 and 56: Conversion Instructions 3.13 CAW Ch
Page 57 and 58: 3.15 RND Round Format Description S
Page 59: 3.17 RND+ Round to Upper Double Int
Page 63 and 64: 4.3 L Load Current Counter Value in
Page 65 and 66: 4.5 R Reset Counter Format Descript
Page 67 and 68: 4.7 CU Counter Up Format CU Counte
Page 69 and 70: 5 Data Block Instructions 5.1 Overv
Page 71 and 72: 5.3 CDB Exchange Shared DB and Inst
Page 73 and 74: Data Block Instructions 5.6 L DILG
Page 75 and 76: 6 Logic Control Instructions 6.1 Ov
Page 77 and 78: 6.2 JU Jump Unconditional Format De
Page 79 and 80: 6.4 JC Jump if RLO = 1 Format Descr
Page 81 and 82: 6.6 JCB Jump if RLO = 1 with BR For
Page 83 and 84: 6.8 JBI Jump if BR = 1 Format Descr
Page 85 and 86: 6.10 JO Jump if OV = 1 Format Descr
Page 87 and 88: 6.12 JZ Jump if Zero Format Descrip
Page 89 and 90: 6.14 JP Jump if Plus Format Descrip
Page 91 and 92: 6.16 JPZ Jump if Plus or Zero Forma
Page 93 and 94: 6.18 JUO Jump if Unordered Format D
Page 95 and 96: 7 Integer Math Instructions 7.1 Ove
Page 97 and 98: Integer Math Instructions 7.3 +I Ad
Page 99 and 100: Integer Math Instructions 7.5 *I Mu
Page 101 and 102: Example: 13 divided by 4 Contents o
Page 103 and 104: Example 3 STL Explanation L MD20 L
Page 105 and 106: Integer Math Instructions 7.9 -D Su
Page 107 and 108: Integer Math Instructions 7.11 /D D
Page 109 and 110: Integer Math Instructions 7.12 MOD
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8 Floating-Point Math Instructions
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8.3 Floating-Point Math Instruction
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Floating-Point Math Instructions 8.
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9 Load and Transfer Instructions 9.
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Contents of ACCU 1 Load and Transfe
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Load and Transfer Instructions 9.4
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9.9 T Transfer Format Description S
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10 Program Control Instructions 10.
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10.3 BEC Block End Conditional Form
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10.5 CALL Block Call Format Descrip
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10.6 Call FB Format Description CAL
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10.7 Call FC Format Description CAL
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10.8 Call SFB Format Description CA
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10.9 Call SFC Format Description CA
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10.12 CC Conditional Call Format De
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10.14 MCR (Master Control Relay) !
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10.15 Important Notes on Using MCR
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Example Program Control Instruction
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10.18 MCRA Activate MCR Area Format
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11 Shift and Rotate Instructions 11
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Example 1 STL Explanation L MW4 //L
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Examples Shift and Rotate Instructi
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11.2.2 RLD Rotate Left Double Word
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11.2.3 RRD Rotate Right Double Word
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11.2.4 RLDA Rotate ACCU 1 Left via
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12 Timer Instructions 12.1 Overview
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Time Base Timer Instructions Bits 1
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12.3 FR Enable Timer (Free) Format
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Timer Instructions 12.4 L Load Curr
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Timer Instructions 12.5 LC Load Cur
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12.6 R Reset Timer Format R Timer
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Enable input Start input Reset inpu
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Enable Input Start Input Reset Inpu
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13 Word Logic Instructions 13.1 Ove
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Examples Word Logic Instructions Bi
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14 Accumulator Instructions 14.1 Ov
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14.3 POP CPU with Two ACCUs Format
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14.5 PUSH CPU with Two ACCUs Format
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14.7 ENT Enter ACCU Stack Format De
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14.10 DEC Decrement ACCU 1-L-L Form
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14.12 +AR2 Add ACCU 1 to Address Re
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14.15 NOP 1 Null Instruction Format
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A Overview of All STL Instructions
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German Mnemonics English Mnemonics
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German Mnemonics English Mnemonics
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Overview of All STL Instructions A.
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English Mnemonics German Mnemonics
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English Mnemonics German Mnemonics
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B Programming Examples B.1 Overview
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Absolute and symbolic Programming P
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Absolute and symbolic Programming P
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B.3 Example: Timer Instructions Clo
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Signal states of the Bits of Memory
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Statement List that Activates the I
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B.6 Example: Word Logic Instruction
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C Parameter Transfer ! The paramete
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Index ) ) .........................
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I -I ..............................
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SLD................................
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Statement List (STL) - DCE FEL ČVUT v Praze

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