Omron SYSMAC CJ1W-SCU21-V1 User Manual

145
SECTION 5
Using Protocol Macros
This section describes the procedure and other information required to use protocol macros.
5-1 Overview of the Protocol Macro Functions . . . . . . . . . . . . . . . . . . . . . . . . . . 146
5-1-1 Protocol Macro Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
5-1-2 Using the Protocol Macro Function . . . . . . . . . . . . . . . . . . . . . . . . . 146
5-1-3 Protocol Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5-2 Setup Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
5-2-1 Setup Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
5-2-2 Setup Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
5-3 Auxiliary Area and CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
5-3-1 Auxiliary Area Allocations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
5-3-2 CIO Area Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
5-3-3 Software Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
5-3-4 Status Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
5-4 Using Protocol Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
5-4-1 Executing Communications Sequences . . . . . . . . . . . . . . . . . . . . . . 176
5-4-2 Ladder Program Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
5-4-3 Ladder Program Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5-5 Simple Backup Function (Backup of Protocol Macro Data) . . . . . . . . . . . . . 187
5-6 Enhanced Protocol Macro Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
5-6-1 Data Exchange Timing for Link Words . . . . . . . . . . . . . . . . . . . . . . 191
5-6-2 Clearing/Holding Contents of Reception Buffer in Full-duplex Mode 193
5-6-3 High-speed Baud Rate for Protocol Macro Mode . . . . . . . . . . . . . . 193

Omron SYSMAC CJ1W-SCU21-V1 Specifications

General

Model	CJ1W-SCU21-V1
Type	Serial Communications Unit
Number of Ports	1
Parity Check	None, Even, Odd
Manufacturer	Omron
Operating Temperature	0 to 55 °C
Storage Temperature	-25 to 65 °C
Data Bits	7, 8
Stop Bits	1 or 2 bits
Flow Control	RTS/CTS
Isolation	Photocoupler isolation
Applicable PLC	CJ1 Series
Power Supply	5 VDC (supplied from the PLC backplane)
Compatible PLC Series	CJ1 Series
Protocol Support	NT Link, Host Link, No-protocol Mode
Baud Rate	300 to 115200 bps

Summary

Intended Audience

General Precautions

Safety Precautions

Operating Environment Precautions

Application Precautions

Conformance to EC Directives

6-1 Applicable Directives

Lists the relevant EC Directives, specifically EMC Directives and Low Voltage Directive.

6-2 Concepts

Defines the concepts related to EMC Directives, emphasizing OMRON devices' conformity to standards.

Unit Versions of CS/CJ-series Serial Communications Boards/Units

Unit Versions

Introduces the concept of unit versions for managing CS/CJ-series Serial Communications Units/Boards.

1. Unit Version Notation on Products

Describes how unit version codes are provided on product nameplates for CS-series Serial Communications Boards and Units.

Functions Added in the Unit Version 1.3 Upgrade

Functions Added in the Unit Version 1.2 Upgrade

SECTION 1 Introduction

1-1 Using this Manual

Explains how to use the manual for Host Link, protocol macro, and 1:N NT link communications.

1-2 Overview

Provides an overview of the Serial Communications Boards and the Serial Communications Unit.

1-3 Protocol Overview

Details the various serial communications modes supported by Serial Communications Boards and Units.

1-4 Features

Describes the features of the Serial Communications Boards, the Serial Communications Unit, and the protocols.

1-5 System Configurations

Explains the system configuration supported by each serial communications mode.

1-6 Specifications

Provides detailed specifications for Serial Communications Boards and Units, including ports, protocols, and data exchange.

1-7 Comparison to Previous Products

Compares CS/CJ-series Serial Communications Boards/Units with C200HX/HG/HE Communications Boards and Host Link Units.

1-8 Selecting the Serial Communications Mode

Guides the user in selecting the appropriate serial communications mode based on the connected device.

1-9 Basic Operating Procedure

Provides an overview of the basic operating procedures for installing and configuring the units.