Mitsubishi 20-L Specifications download pdf (Page 98)

5-16

5.2 Structured Ladder/FBD

5.2.3 Executing order

The following figures explain the program executing order.

The operation order in a ladder block is from the left power rail to the right and from the top to the

bottom.

The program is executed from the left power rail to the right when the ladder is not branched and

ENs and ENOs are connected in series.

The program is executed from the top to the bottom, when the ladder is branched and ENs and

ENOs are connected in parallel.

The program is executed in the order as shown below when the MOV instruction ( ) in the

above figure is moved to the top.

Move to the top

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 121 122

MELSEC-Q/L/F Structured 1
SAFETY PRECAUTIONS 3
REVISIONS 5
INTRODUCTION 7
CONTENTS 7
INDEX Index - 1 to Index - 2 9
(1) Structured programming 10
(2) Operation of GX Works2 10
OVERVIEW 11
1.1 Overview 12
1.2 Purpose of This Manual 12
1.2 Purpose of This Manual 13
1.3 Terms 16
Name Description 17
1.5 Applicable CPU Modules 18
STRUCTURED DESIGN OF 21
SEQUENCE PROGRAMS 21
Structured Project 24
PROGRAM CONFIGURATION 25
4.1.1 Project 27
4.1.2 Program files 27
4.1.3 Tasks 28
4.2 POUs 29
4.2.1 Types of POU 29
4.2.2 Program 30
4.2.3 Functions 30
4.2.4 Function blocks 31
4.2.5 Operators 31
4.2.6 Ladder blocks 32
4.2 POUs 33
4.2.9 EN and ENO 37
4.2.9 EN and ENO 38
4.3 Labels 39
4.3.1 Global labels 39
4.3.2 Local labels 39
4.3.3 Label classes 40
4.3.4 Setting labels 41
4.3.5 Data types 42
4.3 Labels 43
4.3.5 Data types 43
Method for Specifying Data 45
Bit data 46
Word (16 bits) data 47
K1 (4 points) 48
K2 (8 points) 48
K3 (12 points) 48
K4 (16 points) 48
(2) Using word devices 49
Double word (32 bits) data 50
PROGRAM 51
CONFIGURATION 51
[Exponent] 53
[Exponent] 54
String data 57
Time data 58
4.4.7 Arrays 59
Double-precision real 8192 60
Structures 61
4.5 Device and Address 62
4.5.1 Device 62
4.5.2 Address 63
(a) QCPU (Q mode)/LCPU 64
(b) FXCPU 65
4.5 Device and Address 66
Index Setting 67
4.6 Index Setting 68
D Extended data register 72
W Extended link register 72
4.7 Libraries 79
4.7.1 User libraries 80
WRITING PROGRAMS 83
5.1.1 Standard format 84
Operators in ST language 85
5.1.3 Syntax in ST language 86
5.1.3 Syntax in ST language 87
WRITING 91
PROGRAMS 91
Compilation error occurs 94
5.2 Structured Ladder/FBD 95
5.2.1 Standard format 95
Series-connection contact 96
Parallel-connection contact 96
5.2.3 Executing order 98
< Example > 99
< Compile Result > 99
5.2 Structured Ladder/FBD 100
APPENDICES 103
Types and Devices 104
Label Names and Data Names 108
2 3 4 5 6 7 8 9 109
2 3 4 5 6 7 110
Recreating Ladder Programs 111
Device Purpose 112
Data type Label name 112
WARRANTY 119
SH(NA)-080782ENG-M 120
SH-080782ENG-M(1307)KWIX 122
MODEL: Q/FX-KP-KI-E 122
MODEL CODE: 13JW06 122

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Mitsubishi 20-L Specifications Page 98

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