Omron SYSMAC CJ1W-SCU31-V1 User Manual

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SECTION 2
Initial Settings and I/O Memory Allocations
This section describes the components of the Serial Communications Boards and the Serial Communications Units, the
settings required for operation, and the memory allocated in the I/O memory of the CPU Unit for controlling and
monitoring communications.
2-1 Component Names and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
2-1-1 Serial Communications Boards (CS Series Only) . . . . . . . . . . . . . . 62
2-1-2 CS-series Serial Communications Unit . . . . . . . . . . . . . . . . . . . . . . 66
2-1-3 CJ-series Serial Communications Unit. . . . . . . . . . . . . . . . . . . . . . . 69
2-2 Data Exchange with the CPU Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
2-2-1 Serial Communications Board (CS Series Only) . . . . . . . . . . . . . . . 72
2-2-2 Serial Communications Units (CS/CJ Series) . . . . . . . . . . . . . . . . . 73
2-3 I/O Memory Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
2-3-1 DM Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
2-3-2 CIO Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
2-3-3 Related Auxiliary Area Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Omron SYSMAC CJ1W-SCU31-V1 Specifications

General

Brand	Omron
Model	SYSMAC CJ1W-SCU31-V1
Category	Network Hardware
Language	English

Summary

PRECAUTIONS

2 General Precautions

Outlines general safety and operational guidelines for using OMRON products according to specifications.

3 Safety Precautions

Details essential safety measures in external circuits to ensure system safety during abnormalities.

SECTION 1 Introduction

1-5 System Configurations

Explains system configurations supported by each serial communication mode.

1-6 Specifications

Details the technical specifications for CS-series Serial Communications Boards and Units.

1-8 Selecting the Serial Communications Mode

Guides users on selecting the appropriate serial communications mode for their application.

1-9 Basic Operating Procedure

Outlines the fundamental steps for operating the system, including setup and communications.

SECTION 2 Initial Settings and I/O Memory Allocations

2-2 Data Exchange with the CPU Unit

Explains how data is exchanged between the CPU Unit and communications units via I/O memory.

2-3 I/O Memory Allocations

Details the DM Area, CIO Area, and Auxiliary Area allocations for communications boards and units.

SECTION 3 Installation and Wiring

3-1 Installing a Serial Communications Board

Provides instructions for installing a Serial Communications Board into a CPU Unit's option slot.

3-2 Installing Serial Communications Units

Details the procedure for installing Serial Communications Units into the CPU Rack or Expansion Rack.

3-3 Wiring

Covers essential wiring precautions, port types, and connection methods for various modes.

3-4 RS-232C and RS-422A/485 Wiring

Provides recommended wiring examples and connector pin layouts for RS-232C and RS-422A/485.

SECTION 4 Using Host Link Communications

4-1 Host Link Communications

Explains how to use Host Link System for PLC monitoring, control, and data transfer.

4-2 Setup Area Allocations

Describes the Setup Area allocated in the DM Area for Host Link communications.

SECTION 5 Using Protocol Macros

5-2 Setup Area Allocations

Explains the Setup Area allocated in the DM Area for Protocol Macro mode.

5-4 Using Protocol Macros

Covers the procedure for executing communications sequences using the PMCR(260) instruction.

SECTION 6 Serial Gateway

6-4 Using the Serial Gateway

Details how to use the Serial Gateway for protocol conversion and network access.

6-5 Protocol Conversion

Explains the process of converting FINS messages to CompoWay/F, Modbus-RTU, Modbus-ASCII.

6-7 Conditions Requiring Routing Tables

SECTION 7 No-protocol Mode

7-2 Allocation DM Area for No-protocol Mode

7-4 Basic Operating Procedure in No-protocol Mode

Outlines the procedure for using the no-protocol mode, including connections.

SECTION 10 Loopback Test

10-1 Executing Loopback Tests

Details how to execute a loopback test to check port communications circuits.

10-2 Setup Area Allocations

SECTION 11 Troubleshooting and Maintenance

11-1 Indicator Error Displays

Describes indicator statuses and possible causes for Serial Communications Boards and Units.

11-2 Status Area Error Indications

Explains error indications found in the Status Area for various communication modes.

11-3 Troubleshooting

Provides guidance on resolving transmission and reception problems for various modes.

11-4 Error Logs

11-6 Replacement Precautions

Outlines precautions for replacing boards or units and related settings.