ICP DAS USA I-7242D Einrichtungshandbuch

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 1

The I-7242D DNS/Modbus RTU Gateway

Quick Start User Guide

1. Introduction

This user guide introduces the user how to implement the I-7242D

module into their applications in a quick and easy way. Therefore, it only

provides the basic instructions. For more detailed information, please refer

to the I-7242D user manual located on the ICPDAS CD-ROM or download

it from the ICPDAS web site:

ftp://ftp.icpdas.com.tw/pub/cd/can_cd/devicenet/gateway/i-7242d/manual/

The sake of this manual is focused on helping users to quickly

familiarize themselves with the I-7242D module. Users can apply the

I-7242D module as follows.

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 2

2.Hardware Structure

Bypass CAN

Bus Connecto

CAN Bus

Connector

DeviceNet

tatus LED

Power LED

7-segment

LED dis

3.5-digital 7-segment LED Displays

For more information, please refer to section 2.5 of the I-7242D User’s Manual.

RS-232 Port

(connect to PC)

RS-485 Port

(

Connect to Modbus devices

)

RS-485 Port

(Reserved for

uture

use)

Power In

Init *

larm Out

Clear Alarm

Ste

1. Dis

the strin

“-DEV-”

Step2. It means that the I-7242D is in the

normal operation mode. Its MAC ID is 0x03.

CAN baud rate is 125 Kbps and RS-485 baud

rate is 115.2 Kbps.

Step3. It means that there is one message lost

from I-7242D to Modbus device which device

address is 0x01. The number format is hex.

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 3

4.Configuration Flowchart

Select the necessary Modbus RTU devices

in the DeviceNet networ

1. Connect the COM2 port from the I-

7242D to these Modbus RTU devices.

2. Connect the COM1 port from the I-

7242D to the PC’s COM port with the

download cable, CA0910F.

2. Power on the I-7242D and execute the

DNS_MRU Utility in order to

configure the I-7242D. Then it will

establish the EDS file automatically.

After configuring the I-7242D and creating

the specific EDS files, apply the EDS file

in your DeviceNet application.

1. Initial the I-7242D by connecting the

Init * pin with the GND pin.

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 4

5.Software Installation

Before users use the I-7242D, they must configure the I-7242D by the DNS_MRU

Utility. Please do following steps to configure the I-7242D.

Step 1: Please install the DNS_MRU Utility. You can find this configuration tool from

our web site: ftp://ftp.icpdas.com.tw/pub/cd/can_cd/devicenet/gateway/i-7242d/utility/

or the CD-ROM disk following the path of /CAN-CD/ DeviceNet/ Gateway/ I-7242D/

Utility/.

Step 2: Before you use the software, connect the I-7242D with your computer

correctly. Then turn off the I-7242D and connect the INIT* pin with the GND pin of the

I-7242D.

Step 3: Turn on the I-7242D. And execute the DNS_MRU Utlility.exe file. Thus the

startup figure would be displayed.

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 5

Step 4: Select PC’s COM port correctly. Then press the “Connect” button to connect

with the I-7242D. Then it would take few seconds to read the communication

parameters stored in the I-7242D’s EEPROM.

Step 5: After reading parameters from EEPROM, a related information dialog box will

be displayed. Then you can set the CAN and COM port parameters to what you need.

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 6

Step 6: After setting the CAN and COM port parameter, press the “Next” button to

start to set their Modbus devices parameters. Users can use the add button, erase

button, update button or delete button to modify their Modbus devices parameters.

And users can view the information of devices, application object and assembly object

by clicking these “View” buttons.

Step 7: After the configuration of Modbus devices parameters, press the “Next” button

and start to build the specific EDS file for the I-7242D. Set the EDS file information and

give it a description in the description box. Then set the poll, strobe-bit and COS/Cyclic

I/O connection path for the I-7242D.

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 7

Step 8: The last step is to press the “Finish” button to create the EDS file and store

these setting in the I-7242D. You can find the EDS file “MBDNS_x.eds” in the path of

DNS_MRU.exe.

6.The relation of application and assembly objects

The components of Assembly Objects

Example : (one DO device、one DI device、one AO device、one AI device)

In this example, apply four Modbus devices in the system.

Application object instances in the I-7242D

Application

Instance ID Device Address Device

I/O Type Relay/Register

Start Address Relay/Register

Data Length

0x01 1 0 (DO) 1 16

0x02 3 2 (DI) 1 7

0x03 5 1 (AO) 1 3

0x04 7 3 (AI) 1 4

I-724D DNS/Modbus RTU Quick Start User Guide, July 2006, Version 1.1 ------ 8

The components of assembly objects in I-7242D

Assembl

ect Instance

ID Data Length (Byte) Component devices

(ID, Address)

0x64 DO: 2 1(00016~00001)

0x65 AO: 6 2(40001~40003)

0x66 DI: 1 3(10007~10001)

0x67 AI: 8 4(30001~30004)

“User-defined Modbus Device Object” ( 0x64 ) attributes:

Attribute ID Description Data Type Method Value

0x01 Device ID CHAR Get 0

0x02 Device I/O Type CHAR Get 0

0x03 Device Start Address WORD Get 0

0x04 Device Length WORD Get 0

0x05 Data Lose Counter WORD Get/Set 0

0x14 DO Data

Defined by

device num. Get/Set 0

0x15 AO Data

Defined by

device num. Get/Set 0

0x16 DI Data

Defined by

device num. Get 0

0x17 AI Data

Defined by

device num. Get 0

7.Steps to implement the DeviceNet applications by

using the command set

1. Request the use of the Predefined Master/Slave Connection Set.

2. Apply the Master’s Explicit Request Messages to set the

expected_packet_rate attribute of the I/O connection and make the I/O

Connection Object State established.

3. There are two ways to access I/O devices. One method is by the way of the

I/O connection object. Another is by using an explicit message to set/get the

I/O attribute of application object.

4. Release the use of the Predefined Master/Slave Connection Set.

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