SiboTech ENB-302MI User Manual

EtherNet IP / Modbus Gateway

ENB-302MI

User Manual

REV 1.1

Sibotech Automation Co., Ltd

Technical support: +86-021-5102 8348

E-mail: support@sibotech.net

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Table of Contents

1 About the Gateway...........................................................................................................................................- 4 -

1.1 Function...................................................................................................................................................- 4 -

1.2 Feature.....................................................................................................................................................- 4 -

1.3 Technical specification........................................................................................................................ - 4 -

2 Rapid Application Guide................................................................................................................................ - 6 -

2.1 Connecting the power.......................................................................................................................... - 6 -

2.2 Connect serial devices......................................................................................................................... - 6 -

2.3 Ethernet connection..............................................................................................................................- 7 -

2.4 Configuration Switch...........................................................................................................................- 8 -

2.5 Installing software................................................................................................................................ - 8 -

3 Hardware Description......................................................................................................................................- 9 -

3.1 Appearance.............................................................................................................................................- 9 -

3.2 Indicators................................................................................................................................................ - 9 -

3.3 Configuration switches......................................................................................................................- 10 -

3.4 Interface.................................................................................................................................................- 10 -

3.4.1 Power interface........................................................................................................................ - 10 -

3.4.2 Ethernet interface.....................................................................................................................- 11 -

3.4.3 RS-485 interface...................................................................................................................... - 11 -

4 Instructions of Configuration Software.....................................................................................................- 13 -

4.1 Notes before configurating............................................................................................................... - 13 -

4.2 User interface.......................................................................................................................................- 14 -

4.3 Operation of equipment view...........................................................................................................- 16 -

4.3.1 Equipment view interface......................................................................................................- 16 -

4.3.2 Operation mode of equipment view....................................................................................- 17 -

4.3.3 Operation types of equipment view.................................................................................... - 17 -

4.4 The operation of configuration view.............................................................................................. - 18 -

4.4.1 Interface of Ethernet configuration view........................................................................... - 18 -

4.4.2 Interface of subnet configuration view...............................................................................- 19 -

4.4.3 Interface of node configuration view..................................................................................- 21 -

4.4.4 Interface of command configuration view........................................................................ - 21 -

4.4.5 Notes View................................................................................................................................- 23 -

4.5 Conflict detect......................................................................................................................................- 23 -

4.5.1 Operation of command list....................................................................................................- 24 -

4.5.2 Operation of memory mapping area................................................................................... - 24 -

4.6 Hardware communication.................................................................................................................- 25 -

4.6.1 Ethernet configuration............................................................................................................- 25 -

4.6.2 Upload configuration..............................................................................................................- 26 -

4.6.3 Download configuration........................................................................................................- 28 -

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4.7 Load and save configuration............................................................................................................ - 29 -

4.7.1 Save the configuration project..............................................................................................- 29 -

4.7.2 Load the configuration project.............................................................................................- 29 -

4.8 Output excel document......................................................................................................................- 29 -

4.9 Debug.....................................................................................................................................................- 30 -

5 EtherNet/IP Connection Parameters...........................................................................................................- 33 -

6 Typical Application........................................................................................................................................- 34 -

7 Installation........................................................................................................................................................- 35 -

7.1 Mechanical Dimensions.................................................................................................................... - 35 -

7.2 Installation............................................................................................................................................- 35 -

8 Attention........................................................................................................................................................... - 37 -

9 Copyright Information...................................................................................................................................- 38 -

10 Related Products...........................................................................................................................................- 39 -

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1 About the Gateway

 Redundant Power Supply

 Two independent RS485 interfaces 1KV optical isolation

 Ethernet 10/100M adaptive

 IP address conflict detection

 Modbus network debugging

 Easy to use configuration software GT-123

1.1 Function

Through the conversion between EtherNet IP protocol and Modbus protocol of ENB-302MI, Modbus serial

devices can access EtherNet IP network, bi-directional and easily exchange data.

1.2 Feature

1.3 Technical specification

[1] EtherNet / IP network is independent with two Modbus networks;

[2] Ethernet 10/100M adaptive;

[3] Support IP addresses conflict detection function;

[4] Support the ODVA Standard EtherNet / IP communication protocol;

[5] Two serial RS485 interfaces, half-duplex, and baud rate support: 1200, 2400, 4800, 9600, 19200, 38400,

57600, 115200; parity mode support: none, odd, even, mark, space; 1 or 2 stop bits;

[6] ENB-302MI act as master at the side of Modbus network and support 01H, 02H, 03H, 04H, 05H, 06H, 0FH,

10H function codes, can be configured up to 48 Modbus commands for each RS485 interface; Modbus function

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codes 03H, 04H, 06H and 10H support "Byte swap" function, and it can help users solve the problem of data

format between two different networks;

[7] Two independent RS485 interfaces 1KV optical isolation;

[8] The maximum number of input and output bytes of EtherNet / IP:

Maximum number of input bytes: 512Bytes

Maximum number of output bytes: 512Bytes

[9] Power supply: 24VDC (11V ~ 30V), 90mA (24VDC);

[10] Working temperature: -20 ℃ ~ 60 ℃, relative humidity: 5% ~ 95% (no condensation);

[11] Dimensions: 40mm (width) × 125mm (height) × 110mm (depth);

[12] Installation: 35mm rail;

[13] Protection class: IP20;

[14] Test standard: EMC test standards

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2 Rapid Application Guide

GND

24V+

GND

24V+

DC power: +24V Ⅰ

Power interface of ENB-302MI

GND

24V+

GND

24V+

Optionally be connected

Must be connected

Power interface of ENB-302MI

（the other）

DC power: +24V Ⅱ

2.1 Connecting the power

DC 24V power supply, dual power supply interface, a redundant function, users can use one or two power supply.

If you are using two power supply, when the way in which the power fails, the other way you can continue to

supply power to ensure normal operation.

Power supply wiring as shown below:

2.2 Connect serial devices

RS485 connection as shown below:

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B+A-GND

485+

485-

RS485 device 1

RS485 interface

RS485 device 2

RS485 device 3

485+

485-

485+

485-

…

In order to prevent signal reflection and interference in RS485 multipoint communication, adding one

terminal resistor at the both farthest ends of the line is necessary, and the argument is 120Ω 1/2W.

Note: There is no internal termination resistor in the RS485 interface of ENB-302MI.

2.3 Ethernet connection

Ethernet interface apply RJ-45 connector, 10/100M adaptive.

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Signal Description

TXD+，Tranceive Data+, Output

TXD-，Tranceive Data-, Output

RXD+，Receive Data+, Input

Bi-directional Data+

Bi-directional Data-

RXD-，Receive Data-, Input

Bi-directional Data+

Bi-directional Data-

2.4 Configuration Switch

Mode bit (bit 1)

Function bit (bit 2)

Description

Off

Operation mode, allowing read and write

configuration data

Off

Operation mode, read and write

configuration data against

Off or On

Configuration mode, IP address is fixed at

192.168.0.10, this mode can only read and

write configuration data, can not

communication between EtherNet / IP and

Modbus network

Configuration switches located on the bottom of the gateway, set the mode bit (bit 1) to 0 (Off), and set

function bit (bit 2) to 0 (Off), power (or restart) the device to work.

2.5 Installing software

Take the product CD into the computer CD drive, open the CD, install the configuration software GT-123.

You can easily follow the prompts to complete the installation. Then open the configuration software and finish

the configuration of ENB-302MI!

Note: The factory set of ENB-302MI is DHCP, if the network is no DHCP Server, you can set mode bit (bit

1)to 1(On), and restart ENB-302MI, then the fixed IP address of ENB-302MI is 192.168.0.10, mask is

255.255.255.0, gateway address is 192.168.0.1.

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3 Hardware Description

Indicator

Status

Description

ENS

Always green

EtherNet / IP connection is established

Green flashing

EtherNet / IP connection is not established

Always red

IP address indicates a conflict

Red flashing

EtherNet / IP connection timed out; DHCP, BOOTP ,

IP address conflict detection

SNS

Always green

Modbus Communication normal

Always red

At least one Modbus network response timeout,

exception or error

Ethernet RJ-45 interface

RS-485interfaceⅠ

RS-485interfaceⅡ

Configuration switches

Power interface

Indicator

3.1 Appearance

3.2 Indicators

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Alternately flashing red

and green light

At least part of one Modbus network timeout, an

exception or error

ENS orange light and SNS

orange light

（orange light: Red and green

light at one time）

Light at one time

Start status

Flash alternately

Configuration mode

3.3 Configuration switches

Off

On 1 2

Mode bit (bit 1)

Function bit (bit 2)

Description

Off

Operation mode, allowing read and write

configuration data

Off

Operation mode, read and write

configuration data against

Off or On

Configuration mode, IP address is fixed at

192.168.0.10, this mode can only read and

write configuration data, can not

communication between EtherNet / IP and

Modbus network

Configuration switch locate on the bottom, bit 1 is mode select bit, bit 2 is function set bit.

Note: Restart ENB-302MI after resetting the configuration and the configuration can take effect!

3.4 Interface

3.4.1 Power interface

ENB-302MI has two power interfaces, with power redundancy function, when one the way to power failure,

power can continue to supply the other way.

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GND

24V+

引脚

功能

GND,

NC, no connection

24V+ , DC

3.4.2 Ethernet interface

Signal Description

TXD+，Tranceive Data+, Output

TXD-，Tranceive Data-, Output

RXD+，Receive Data+, Input

Bi-directional Data+

Bi-directional Data-

RXD-，Receive Data-, Input

Bi-directional Data+

Bi-directional Data-

Ethernet interface apply RJ-45 connector, 10/100M adaptive.

3.4.3 RS-485 interface

The RS-485 interface of ENB-302MI is standard, and the RS-485 characteristics of the product are shown

as follows:

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1. The basic characteristics of RS-485 transmission technology

B+A-GND

Function

B+，RS485

A-，RS485

GND

① Network topology: Linear bus, there are active bus termination resistors at both sides.

② Transfer rate: 300 bps~115.2Kbps.

③ Media: Shielded twisted-pair cable and also can cancel the shielding, depending on environmental

conditions (EMC).

④Site number: 32 stations per subsection (without repeater), and can up to 127 stations (with RS485

repeater).

⑤Plug connection: 3-pin pluggable terminal.

2. The main points on RS-485 transmission equipments installation

①All the equipments be connected with RS-485 bus;

②Subsection can be connected up to 32 sites;

③The farthest end of each bus has a termination resistor—120Ω 1/2W to ensure reliable operation of the

network.

Serial interface uses 3-pin pluggable terminal and users can wire it according to the wiring instructions on the

panel.

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SiboTech ENB-302MI User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual