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ELC Distributed I/O Adapters

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4 ELC-CAENET

To ensure correct installation and operation of ELC-CAENET, please read this chapter carefully

before using your ELC-CAENET. The ELC-CAENET is an Ethernet remote I/O adapter product

that connects ELC I/O modules to Ethernet networks using either EtherNet/IP or Modbus TCP

protocols. To configure the ELC-CAENET module use EATON’s ELCSoft and ECISoft or an

embedded web page on the device.

The ELC-CAENET supports Modbus TCP server protocol and can be used as remote I/O from

a PLC or other Modbus TCP client devices. The ELC-CAENET can also be used as a Modbus

TCP gateway, supporting the conversion from Modbus TCP commands to Modbus ASCII/RTU.

The ELC-ENET also supports EtherNet/IP adapter functionality to provide remote I/O for a PLC

capable of being an EtherNet/IP scanner.

4.1 Features

zSupports EtherNet/IP Adapter communication with up to 8 connections.

zSupports Modbus TCP server communications with up to 16 connections.

z10/100 Mbps transmission speed; MDI/MDI-X auto-detect.

zSupports up to 16 expansion modules, including up to 8 analog modules

zSupports a maximum of 256 digital Input and Output points.

zIntegrated Modbus TCP to Modbus serial gateway (Allows a Modbus TCP client to

connect to 32 devices on a local modbus serial link).

zSupports embedded “local logic functions”: IF-THEN, counter, timer and real-time clock.

Able to operate independently without control from a main PLC.

zReal time clock synchronized via NTP

zConfigurable using embedded web page or Eaton ELCSoft/ECISoft.

4.2 Specifications

Ethernet interface

Interface RJ-45 with Auto MDI/MDIX

Transmission method 802.3, 802.3u

Transmission cable Category 5e, 100m (Max)

Transmission speed 10/100 Mbps Auto-Detection

Communication

protocol

ICMP, IP, TCP, UDP, DHCP, SMTP, NTP, MODBUS TCP,

ETHERNET/IP

Serial communication interface (COM1)

Interface Mini Din

Transmission method RS-232

Communication speed 19,200 bps

Communication format Stop bit: 1; Parity bit: None; Data bit: 8

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Transmission cable ELC-CBPCELC3

Serial communication interface (COM2)

Interface 3 PIN feed-through terminal

Transmission method RS-485

Transmission distance 4,000 ft (@19.2K)

Communication speed 110, 150, 300, 600, 1,200, 2,400, 4,800, 9,600, 19,200,

38,400, 57,600, 115,200 bps

Communication format Stop bit: 1, 2; Parity bit: None, Odd, Even; Data bit: 7, 8

Communication

protocol Modbus ASCII、Modbus RTU

Environment

Noise immunity

ESD (IEC 61131-2, IEC 61000-4-2): 8KV Air Discharge

EFT (IEC 61131-2, IEC 61000-4-4): Power Line:±2KV, Digital

Input: ±2KV,

Communication I/O: ±2KV

RS (IEC 61131-2, IEC 61000-4-3): 80MHz ~ 100MHz, 10V/m.

1.4GHz ~ 2.0GHz, 10V/m

Conducted Susceptibility Test (EN61000-4-6, IEC61131-2 9.10):

150kHz ~ 80MHz, 3V/m

Surge Test (Biwave IEC61132-2, IEC61000-4-5): Power line

0.5KV DM, Ethernet 0.5KV CM, RS-485 0.5KV CM

Operation 0ºC ~ 55ºC (temperature), 50 ~ 95% (humidity), pollution

degree 2

Storage -25ºC ~ 70ºC (temperature), 5 ~ 95% (humidity)

Shock/vibration

immunity

International standards: IEC61131-2, IEC 68-2-6 (TEST

Fc)/IEC61131-2 & IEC 68-2-27 (TEST Ea)

Certificates

Electrical specification

Power supply voltage 24VDC (-15% ~ 20%) (with DC input polarity reverse

protection)

Power fuse capacity 1.85A/30VDC, Polyswitch

Power consumption 2W

Insulation voltage 500VDC

Weight 116g

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4.3 Product Profile & Outline

4.3.1 Dimension

37.4

33 90

STOP

RS-485

RS-232

ELC-CAENET

RUN

BAT.LOW

POWER

RUN

LAN

Unit: mm

4.3.2 Product Profile

14 17

STOP

RS-485

RS-232

ELC-CAENET

RUN

BAT.LOW

POWER

RUN

LAN

1. POWER indicator 12. RS-485 communication port

2. RUN indicator 13. Extension module positioning hole

3. BAT.LOW indicator 14. Nameplate

4. RUN/STOP switch 15. Extension port

5. RS-232 indicator 16. DIN rail (35mm)

6. RS-485 indicator 17. Extension module fixing clip

7. LINK/ACK indicator 18. DIN rail clip

8. SPEED indicator 19. Power supply port

9. Digital display 20. 3P terminal block (standard accessory)

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10. Ethernet communication port

11. RS-232 communication port

21. Power supply connection cable (standard

accessory)

4.3.3 LED Indicators

LED Color Function

POWER Green Power supply indication

RUN Green RUN/STOP indication

BAT.LOW Red Battery in low power indication

RS-232 Yellow Displays communication status of RS-232 port

RS-485 Yellow Displays communication status of RS-485 port

LINK/ACT Green Displays the status of network

SPEED Yellow Displays the speed of network connection

4.3.4 RUN/STOP Switch

Status Explanation

1. RUN indicator on ELC-CAENET is ON.

2. Analog input/output modules are in RUN status.

RUN

3. Local logic functions are running.

1. Analog input/output module switches from RUN to STOP

status.

RUN ÆSTOP

2. Y points on digital input/output module are all OFF.

1. RUN indicator on ELC-CAENET is OFF.

2. Analog input/output modules are in STOP status.

STOP

3. Local logic function halted.

1. ELC-CAENET re-detects the modules on the I/O bus.

STOP

RUN

STOP ÆRUN 2. Analog input/output modules switch from STOP to RUN

status.

4.3.5 Ethernet RJ-45 PIN Definition

PIN Signal Definition PIN Signal Definition

1 Tx+ Positive pole for data

transmission 5 -- N/C

2 Tx- Negative pole for data

transmission 6 Rx-

Negative pole for data

receiving

3 Rx+ Positive pole for data

receiving 7 -- N/C

4 -- N/C 8 -- N/C

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4.3.6 RS-232 PIN Definition

PIN Signal Definition PIN Signal Definition

1 -- N/C 5 Tx Transmission data

2 -- N/C 6 -- N/C

3 -- N/C 7 -- N/C

4 Rx Reception data 8 GND Ground

4.3.7 RS-485 PIN Definition

PIN Signal Definition

1 SG Signal Ground

2 D- Negative pole for data

3 D+ Positive pole for data

4.4 Installation & Wiring

In this section, we will describe how to connect the ELC-CAENET module to other devices and

the network.

4.4.1 Connecting the ELC-CAENET to ELC I/O Modules

zOpen the extension clips on the top and bottom of the ELC-CAENET. Connect the

extension port of the ELC-CAENET and the I/O module.

zFasten the extension clips on the I/O module. Make sure the contact between the modules

is secure.

ELC-AN02NANN

ELC-EX16NNDR

POWER

RUN

BAT.LOW

RUN

STOP

ELC-CAENET

LAN

RS-232

RS-485

4.4.2 Installing the ELC-CAENET and ELC I/O Modules onto a DIN Rail

zUse standard 35mm DIN rail.

zOpen the DIN rail clips on ELC-CAENET and the I/O modules and insert the modules onto

the rail.

zPress the clips to secure the modules onto the rail.

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ELC-EX16NNDR

ELC-AN02NANN

35mm DIN rail

4.4.3 How to Connect the ELC-CAENET to the Local Area Network

Connect ELC-CAENET to the Ethernet switch using CAT-5e twisted pair cable. Since the

ELC-CAENET has Auto MDI/MDIX functionality, a cross over cable is not requried to connect

directly to a PC. See below for the connection between the PC and ELC-CAENET modules:

ELC-PV28

RUN

STOP

ELCAN02NANN

ELC-EX08NNSN

ELC-EX16NNDR

ELC-AN04ANNN

ELC-TC04ANNN

ELC-PT04ANNN

Ethernet

ELC-CAENET DI/DO AI/AO

ELC-PV28

COM2

ELC-COENETM

4.5 Internal data structure for the ELC-CAENET

This section describes the internal data structure for the ELC-CAENET module. These data

elements can be accessed from Modbus TCP, EtherNet/IP and the local logic features

described in later sections of this manual

4.5.1 Basic Registers (BR)

BR# Attribute Content Explanation Default Latched

0 R Model name

Set up by the system; read only. The model

code of ELC-CAENET= H’0600. H’0600 YES

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BR# Attribute Content Explanation Default Latched

1 R Firmware version

the current firmware verision in hex, e.g. V1.2 is

indicated as high byte = 0x01 and low byte =

0x20.

YES

2 R

Release date of

the version

the data in decimal form. 10,000s digit and

1,000s digit are for “month”; 100s digit and 10s

digit are for “day”. For 1s digit: 0 = morning; 1 =

afternoon.

Example: 12191 indicates the version released

in the afternoon of December 19.

YES

3 R/W

Start/Stop PLC

function NO

4 Reserved NO

5 R/W

COM2

communication

settings

RS-485 communication settings. Please refer to

the table of baud rate setting and

communication format setting.

H’0368 YES

6 R/W Address For setting up the station address K’1 YES

7 R

Number of DI

points Range: 0 ~ 256 NO

8 R

Number of DO

points Range: 0 ~ 256 NO

9 R Error code Displaying the errors. Please refer to the table

of error codes. NO

10 Reserved NO

11 R/W

Communication

time-out

For setting up the communication time-out (ms)

in Modbus TCP mode. K’5000 YES

12 R/W

Communication

delay time

For setting up the minimum interval time

between every communication datum. K’0 YES

13 R/W

TCP connection

idle time

For setting up idle time for TCP communication.

Unit: second K’30 YES

14 ~ 22 Reserved NO

23 R

Number of

analog I/O

modules

Max. 8 NO

24 R

ID of the 1st

analog I/O

module

ID of the 1st analog I/O module NO

25 R

ID of the 2nd

analog I/O

module

ID of the 2nd analog I/O module NO

26 R

ID of the 3rd

analog I/O

module

ID of the 3rd analog I/O module NO

27 R

ID of the 4th

analog I/O

module

ID of the 4th analog I/O module NO

28 R

ID of the 5th

analog I/O

module

ID of the 5th analog I/O module NO

29 R

ID of the 6th

analog I/O

module

ID of the 6th analog I/O module NO

30 R

ID of the 7th

analog I/O

module

ID of the 7th analog I/O module NO

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BR# Attribute Content Explanation Default Latched

31 R

ID of the 8th

analog I/O

module

ID of the 8th analog I/O module NO

32 ~ 49 Reserved NO

50 R/W RTC settings Settings of the real-time clock NO

51 R/W Year Range: 1970 ~ 2099 YES

52 R/W Week Range: 1 ~ 7 YES

53 R/W Month Range: 1 ~ 12 YES

54 R/W Day Range: 1 ~ 31 YES

55 R/W Hour Range: 0 ~ 23 YES

56 R/W Minute Range: 0 ~ 59 YES

57 R/W Second Range: 0 ~ 59 YES

58 ~ 59 Reserved NO

60 Reserved NO

61 ~ 63 Reserved 0 NO

Symbol “R” refers to ready only; “R/W” refers to read and write.

4.5.2 Basic Registers (BR) descriptions

BR#0: Model Name

Model code of ELC-CAENET = H’0600.

BR#1: Firmware Version

The firmware version of ELC-CAENET is displayed in hex, e.g. H’0100 indicates version V1.00

BR#2: Release Date of the Version

The date in decimal form 10,000s digit and 1,000s digit are for “month”; 100s digit and 10s digit

are for “day”. For 1s digit: 0 = morning; 1 = afternoon.

Example: 12191 indicate the version released in the afternoon of December 19.

BR#5: COM2 Communication Settings

Description:

b0 ~ b3

Interface Explanation

Data Baud

rate (bps) Data Baud

rate (bps)

0x1 110 0x6 2,400 0xB 57,600

0x2 150 0x7 4,800 0xC 115,200

0x3 300 0x8 9,600

0x4 600 0x9 19,200

Content COM2

RS-485

0x5 1,200 0xA 38,400

b4 ~ b7

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b7 b6 ~ b5 b4

Explanation

Stop bit

0: 1 Stop bit

1: 2 Stop bits

Parity bit

00 : None parity bit

01 : Odd parity bit

11 : Even parity bit

Data bit

0 : 7 Data bits

1 : 8 Data bits

0000 (0) 7-N-1 0011 (3) 8-O-1 1000 (8) 7-N-2 1011 (B) 8-O-2

0001 (1) 8-N-1 0110 (6) 7-E-1 1001 (9) 8-N-2 1110 (E) 7-E-2

Content

0010 (2) 7-O-1 0111 (7) 8-E-1 1010 (A) 7-O-2 1111 (F) 8-E-2

b8 ~ b15

Content Explanation

0x02 Modbus RTU Master

0x03 Modbus ASCII Master

BR#6: Address

For assigning or reading the Modbus serial address of the ELC-CAENET. The address will be

displayed in the message display after being set up. Range: 1 ~ 247.

BR#7: Number of Digital Input Points

Read the number of digital input points from BR#7. Range: 0 ~ 256. Max. I/O points: 256. The

number of input points is autiomatically detected by the ELC-CAENET based on the connected

I/O cards.

BR#8: Number of Digital Output Points

Read the number of digital output points from BR#8. Range: 0 ~ 256. Max. I/O points: 256. The

number of output points is autiomatically detected by the ELC-CAENET based on the

connected I/O cards.

BR#9: Error Code

Description:

Error code = 0 refers to no error occurring.

Code Indication How to correct

F0 Returning to default setting --

F1 ELC-CAENET being powered --

F2 Power supply in low voltage Check if the power supply of the module is functioning

normally.

F3 Internal error. Manufacturing error.

1. Check if the settings of local logic are incorrect.

2. Re-power ELC-CAENET. If the error still exists, try

step 3.

3. Reset ELC-CAENET. If the error still exists, send

the module back to the manufacturer for repair.

F5 Network connection error Check if ELC-CAENET is properly connected to the

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Code Indication How to correct

network.

F6 TCP connection limit exceeded

Check if the number of client connections exceeds the

maximum. (8 EtherNet/IP or 16 Modbus TCP

connections)

F7 RS-485 setting error Check if the RS-485 communication format is correct.

F8 IP addressing error

1. DHCP request failure.

2. IP address invalid.

3. Subnet mask invalid.

4. Gateway does not exist in the same subnet.

5. Returning to default setting.

F9 Extension module error

Check if the configuration of the extension module

has been modified. If the error still exists, check if the

number of I/O points exceeds the maximum and

whether the there are more than 8 analog/specialty

I/O modules connected.

04 Slave error

0b No response from station

1. Check if ELC-CAENET and RS-485 are properly

connected.

2. Check if the RS-485 transmission speed is

consistent with that of other nodes on the serial

network.

BR#11: Communication Time-out (ms)

Communication time-out. Default = 5,000ms. For example, if you wish to set up the

communication time-out to 7 seconds manually, write 7000 to BR#11. Range: 5 ~ 65,535.

BR#12: Communication Delay Time (ms)

Minimum interval time between every Modbus command. Default = 0ms. For example, if you

wish to set up the communication delay time to 100ms manually, write 100 into BR#12. Range:

0 ~ 65,535.

BR#13: TCP Connection Idle Time (s)

TCP connection idle time. Default = 30 seconds. For example, if you wish to set up the idle

time to 7 seconds manually, write 7 into BR#13. Range: 5 ~ 65,535.

BR#23: Number of Analog/Specialty I/O Modules

The number of Analog/Specialty modules detected at “go to run”. Max. 8.

BR#24 ~ #31: ID of the 1st ~ 8th Analog I/O Module

The ID of the 1st ~ 8th analog I/O modules are read from BR#24 ~ BR#31.

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