Omron CJ2 CPU UNIT SOFTWARE User Manual page 16

Section 4 CPU Unit Initialization
4-1 Overview of CPU Unit Initialization ........................................................................................ 4-2
4-1-1
4-2 PLC Setup ................................................................................................................................ 4-8
4-3 Creating I/O Tables .................................................................................................................. 4-9
4-3-1
4-3-2
4-3-3
4-4 Setting Routing Tables.......................................................................................................... 4-11
4-4-1
4-4-2
4-4-3
4-5 Setting Allocated DM Area Words for Special I/O Units and CPU Bus Units ................... 4-15
4-5-1
4-5-2
4-6 CPU Bus Unit Setup Area ..................................................................................................... 4-16
4-6-1
4-6-2
Section 5 Understanding Programming
5-1 Programming ........................................................................................................................... 5-3
5-1-1
5-1-2
5-1-3
5-1-4
5-2 Tasks....................................................................................................................................... 5-11
5-2-1
5-2-2
5-2-3
5-2-4
5-3 Sections.................................................................................................................................. 5-40
5-3-1
5-4 Function Blocks..................................................................................................................... 5-42
5-4-1
5-4-2
5-4-3
5-5 Symbols.................................................................................................................................. 5-47
5-5-1
5-5-2
5-5-3
5-5-4
5-5-5
5-5-6
5-5-7
5-5-8
5-6 Instructions ............................................................................................................................ 5-62
5-6-1
5-6-2
5-6-3
5-6-4
10
CPU Unit Initial Settings.............................................................................................................. 4-2
I/O Tables .................................................................................................................................... 4-9
Automatic Allocation.................................................................................................................. 4-10
Manual Allocation...................................................................................................................... 4-10
Routing Tables .......................................................................................................................... 4-11
Cases in Which Routing Tables Are Required .......................................................................... 4-13
Setting and Transferring Routing Tables ................................................................................... 4-14
Setting Allocated DM Area Words for Special I/O Units and CPU Bus Units............................ 4-15
Setting Procedure ..................................................................................................................... 4-15
CPU Bus Unit Setup Area ......................................................................................................... 4-16
Setting Procedure ..................................................................................................................... 4-16
Programming Overview............................................................................................................... 5-3
Basic Ladder Diagram Concepts ................................................................................................ 5-6
ST Language............................................................................................................................... 5-8
SFC Overview ............................................................................................................................. 5-9
Overview of Tasks ..................................................................................................................... 5-11
Cyclic Tasks .............................................................................................................................. 5-14
Interrupt Tasks .......................................................................................................................... 5-20
Designing Tasks ........................................................................................................................ 5-30
Overview of Sections ................................................................................................................ 5-40
Function Blocks......................................................................................................................... 5-42
Features of Function Blocks...................................................................................................... 5-43
Function Block Specifications ................................................................................................... 5-44
Overview ................................................................................................................................... 5-47
Types of Symbols ...................................................................................................................... 5-48
Global Symbols ......................................................................................................................... 5-50
Local Symbols........................................................................................................................... 5-50
Network Symbols (CJ2H-CPU6
Variables in Function Blocks ..................................................................................................... 5-55
Symbol Data Types ................................................................................................................... 5-56
Automatic Address Allocation to Symbols................................................................................. 5-61
Basic Understanding of Instructions ......................................................................................... 5-62
Specifying Operands................................................................................................................. 5-69
Data Formats ............................................................................................................................ 5-77
I/O Refresh Timing .................................................................................................................... 5-81
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-EIP and CJ2M-CPU3 Only) ............................................. 5-51
CJ2 CPU Unit Software User's Manual