Yokogawa Standalone MW100 User Manual download pdf

User’s

Manual

Yokogawa Electric Corporation

MW100

Setting for Data Communications via

Modbus Protocol

IM MW100-72E

1st Edition

1st Edition : June 2006(YK)

Overview

This is an explanation of the procedure for entering settings for Modbus communications

with the DAQMASTER MW100.

This manual descries the procedure for data transmission and reception based on a

configuration in which two MW100s are connected for Modbus communications (Modbus/

TCP) over an Ethernet. Note that the MATH function (/M1 option) is required to use the

Modbus client function.

Setup Procedure

The following shows the procedures for entering settings, from connecting to the Ethernet

to applying the data acquired via Modbus communications. For detailed instructions and

specifications on each function, see the MW100 Data Acquisition Unit user's manual.

Enter Ethernet settings

Enter Client Settings, 1

Enter Client Settings, 2

Enter Client Settings, 3

Enter Server Settings

Enter Ethernet Communication Settings

See section 3.2

See IM MW100-76E for how to check the connection.

Enter the destination server.

See section 3.2, “Modbus Client Settings, 2.”

Enter register settings.

See section 3.2, “Modbus Client Settings, 3.”

See section 5.2 for details on registers.

Enable the client function.

See section 3.2, “Modbus Client Settings, 1.”

Enter MATH channel

settings

Enter Server Settings

See section 3.14, “Entering Server Settings.”

Server

Settings

Client

Settings

Connect to Ethernet

Connect the MW100s to the Ethernet.

See section 2.6

Apply data acquired via Modbus communications.

See section 3.6 for the settings.

See section 1.13 regarding communication input channels.

Example System

In this example, the system comprises one client MW100 and one server MW100

connected via Ethernet.

MW100 (Server)

Direction of data

READ

WRITE

MW100 (Client)

IP: 192.168.1.101

Modbus service port: 502

IP: 192.168.1.100

Ethernet

MW100

The MW100 set up as the client in the above system diagram is referred to as the

MW100 client. Likewise, the MW100 set up as the server is referred to as the MW100

server.

1 2 3 4 5 6 7

Summary of Contents

Page 1 - Modbus Protocol

User’s ManualYokogawa Electric CorporationMW100Setting for Data Communications via Modbus ProtocolIM MW100-72E1st Edition1st Edition : June 2006(YK)A

Page 2 - Setup Example

2IM MW100-72ESetup ExampleData is sent and received between the MW100 client and MW100 server. The MW100 client loads and displays measured data from

Page 3 - Client-Side Settings

3IM MW100-72E2. Computed data from MATH channels A001 to A004 of the MW100 client are written to communication input channels C001 to C004 of the MW1

Page 4 - MATH Channel Settings

4IM MW100-72EClient Setting 2Enter settings for the destination server. Enter the IP address of the serverEnter the IP address or host name of the d

Page 5

5IM MW100-72EClient/Server Settings for WRITEServer-Side SettingsServer SettingsSet the MW100 server as the server device. These are the same as the s

Page 6 - Starting Communication

6IM MW100-72EStarting CommunicationStarting Measurement and ComputationMATH channels must be displayed to show transmitted data. After starting measur

Page 7 - Register Data Types

7IM MW100-72EChecking the Communication StatusYou can view log information to check the status of Modbus communications. Modbus communication log in