Omron SYSMAC CJ1W-SCU21-V1 User Manual

149
Overview of the Protocol Macro Functions Section 5-1
Depending on the response received, the user can either choose to resend
the same send message (retry processing), or to perform the next process
(for example, read the process value for a Temperature Controller with a dif-
ferent address).
Note 1. The SEND, RECV, SEND&RECV, WAIT, FLUSH (reception buffer clear),
OPEN (ER-ON), or CLOSE (ER-OFF) commands can be used.
2. Three types of reception matrix are available for switching the processing,
depending on whether the messages are send messages, receive (wait)
messages, or multiple receive (wait) messages. Unlike sequences, these
matrixes are managed as lists.
Sequence Parameters
One protocol
Sequence No. 000 to 999
(60 sequences max./protocol)
Transmission
control parameter
Link word setting
Send/receive
processing
monitoring time
Response
notification method
15 steps max.
Step 0
Step 1
One-step structure
With the SEND, RECV, or
SEND&RECV command
Command (see Note 1)
Next process
• Next step
• To specified step
• Sequence end
• Sequence interrupt
Error processing
Header Address TerminatorData Check
Messages (see note 2)
With the WAIT, FLUSH,
OPEN, or CLOSE command
Message list (see note 2)
Send message list
Receive message list
Reception matrix list (see note 2)
Reception matrix
Case No. 15
Repeated
N (no)
N (error)
Normal end
Command
(see note 1)
Next process
Next process
Case No. 00
Receive message
Header Address TerminatorData Check
15 steps max.
Step 0
Step 1
Y
Parameter Meaning
Transmission control parame-
ters
Control methods, such as flow control
Link words Settings for shared words between the PLC and the
Serial Communications Board.
Monitoring time Monitoring time for send/receive processing
Response notification method Timing for writing received data to I/O memory in the
PLC

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.