Rockwell Automation CDN366 Application Notes

CDN366 DeviceNet Gateway

Application Notes

Table of Contents

Revision...........................................................................................................................3

Purpose:...........................................................................................................................4

Hardware and Software Requirements:...........................................................................4

Schematic Diagrams:.......................................................................................................5

CDN366 Setup & Configurations:..................................................................................7

CDN366 Parameter Configuration:...............................................................................13

Change Parameter Setting Using RSNetWorx:.............................................................16

Serial Stream Object Parameters (Class Code 64):.......................................................17

Serial Receive Object Parameters (Class Code 65): .....................................................20

Serial Transmit Object Parameters (Class Code 66):....................................................22

Serial Receive/Transmit & I/O Mapping:..................................................................... 25

Receive Handshaking & I/O Mapping:.........................................................................25

Transmit Handshaking & I/O Mapping: .......................................................................27

Mapping the Poll I/O Connection to AB-1747-SDN:...................................................30

Basic Troubleshooting...................................................................................................35

ASCII Table ..................................................................................................................36

CDN366 Enclosure Dimensions ................................................................................... 38

CDN366 Template ........................................................................................................39

Revision

Initial Release ……………………………………………………………..……. 6/12/01

Purpose:

This application note is intended to assist users to setup and configure the CDN366 DeviceNet ASCII gateway converter module with an Allen Bradley (AB)1747SDN DeviceNet master scanner for the SLC500 programmable logic controller (PLC) series.

The users must have some basic knowledge of hardware and software.

Hardware: CDN366, AB PLC, AB 1747-SDN modules.

Software: RSLinx, RSNetworx, RSLogix500, and Microsoft Windows.

The user must have a basic knowledge of DeviceNet specifications and principles.

Hardware and Software Requirements:

The hardware and software requirement is based upon the application. For this particular application note, the hardware and software are set up based on the listing below. Note, the configuration below is meant to demonstrate the CDN366 DeviceNet

module integrated with an AB SLC502 PLC and not intended to ask users to use the same configuration. Based on application requirements, the CDN366 can integrate with many

brands of PLC (AB, Omron, etc.) or PC based platforms (Synergetic, etc.). As long as a DeviceNet network is available for a particular application, the CDN366 should be able to integrate in the network.

Hardware:

1) AB SLC500 4 slot rack, cat. #1747-A4, series B

2) AB SLC500 power supply, cat #1747-P1, series A

3) AB SLC502 CPU, cat.#1747-L524, series C

4) AB SLC500 scanner module, cat.#1747-SDN, series A

5) AB SLC500 8 input module, cat. #1747-IV8, series A (optional)

6) AB SLC500 8 output module, cat. #1747-OB8, series A (optional)

7) AB SLC500 personal computer interface module, cat. #1747-PIC, series A

8) AB SLC500 converter RS232 to DeviceNet, cat.#1770-KFD, series A

9) MKS DIP CDN366 DeviceNet gateway module

10) MKS DIP DIP790 DeviceNet distribution board

11) Connector and cable

Software:

1) AB SLC500 RSLinx & RSNetWorx for DeviceNet, Rev. 2.01.03-ENE

2) AB SLC500 RSLogix 500 programming, Rev. 4.00.00-ENE

For more information on the above products, please visit the web sites at …

1) CDN366 support documents … specs. manual, EDS files, examples www.mksinst.com/cgi-bin/product.exe?pid=cdn366

2) 1747-SDN DeviceNet Scanner Module: Installation Manual www.ab.com/manuals/io/1747/174758.pdf

3) Setup RSLinx, RSNetworx with 1747-SDN DeviceNet Scanner Module www.ab.com/manuals/cn/1747-um652b-en-p.pdf

4) SLC500 Instructions & Set Manual www.ab.com/manuals/cp/1747615.pdf

5) DeviceNet to RS232 Interface Converter Installation Instructions

www.ab.com/manuals/cn/177056.pdf

6) DeviceNet to RS232 Interface Module Communication Protocol Ref. Manual

www.ab.com/manuals/cn/17706522.pdf

7) SLC500 chassis, power supply, digital/analog/adapter modules

www.ab.com/manuals/io/1746/index.html#1746adapter

Schematic Diagrams:

The electrical schematic diagram figure 1 shown on page 3, CDN366 is integrated with an Allen Bradley (AB) SLC502. The AB SLC500 four-slot rack system contains a rack power supply (1747-P1), a PLC processor on slot 0 (1747-L524), and a DeviceNet scanner module on slot 1 (1747-SDN), an 8 points input module on slot 2 (1746-IV8), and an 8 points output module on slot 3 (1747-OB8). (For further hardware and software configurations, please visit Allen Bradley website at http://www.ab.com/ )

The 24vdc regulated power supply is powered the network BUS-(0vdc) and BUS+(24vdc) on DIP790 board. DIP790 is a DeviceNet distribution board with 1-inline & 6-outline connections. The DIP790 is connected to an AB 1747 DeviceNet scanner module, which is tapped into the DeviceNet network. Based upon Open DeviceNet Vendor Association, Inc. (ODVA) specification, the operational voltage ranges from 11~25 vdc. The nominal voltage is 24 vdc. (For more information on specifications, visit ODVA home page at www.odva.org.)

The AB 1747-PIC is a communication interface module, which uses RSLogic500 software to interface with a PC. RSLogic500 is a window based ladder logic software program. RSLogic500 enables the user to upload/download and monitor PLC data.

The AB 1770-KFD is a communication interface module, which enables the user to communicate between serial RS232 to DeviceNet network. The communication enables the user to setup, configure and access DeviceNet network information using RSLinx and RSNetWorx software.

120VAC

Input

Fuse 1A Fuse 6A

24VDC Power Supply

120VAC 24VDC

GND

To PC RS232 25

Pin Serial Interface

For Used with RSLogic Prog.

Allen Br adley SLC500 4 Slot Rack , 1746-A4

24vdc output

1747-P1

120/240VAC

Neutral GND

PC Interface

Module

1747-PIC

RS232-PLC

RS232 serial communication

Slot 0

SLC502

PLC CPUFuse 3A

1747-L524

Comm. Comm.

Slot 1

DeviceNet

Scanner

1747-SDN

8 pt. Input

module

1746-IV8

to pin 5 DeviceNet connector

to pin 1 DeviceNet connector

Slot 3Power Sup. Slot 2

8 pt.Output

module

1746-OB8

DeviceNet network

PS to DeviceNe t Dist.

Color Description black

1 3

BUS- (0vdc)

clear

Shield (Drain)

red BUS+ (24vdc)

To PC RS232 9 pin

Serial Interface For

Used with RSLinx ,

& RSNetWorx P r og.

9 pin DIN RS232 Serial

Interface to Barcode

Reader, Scanner

Weigh Scale or etc.

RS232 Pin Layout

Func. Func.

Pin Pin Pin

RXD

27 38

TXD

GND

Pin 1,4,6,9 are unused

RTS CTS

PC Interface Mod.

1770-KFD

RS232-DeviceNet

DeviceNet

Gateway Module

CDN366

RS232-DeviceNet

DeviceNet

Male Connector

Figu re 1. CDN366 Integrate wi t h Allen Bradley SLC500

DIP790 Device Net Dist. Board

1 2 3 4 5

4 5

Terminal Connector

Color black

blue

clear

white

red

Description

V- (BUS-)

data low (CAN L)

shield (Drain)

data high (CAN H)

V+ (BUS+)

DeviceNet Connector

Color Description

clear

red black white

blue data low (CAN L)

shield (Drain)

V+ (BUS+)

V- (BUS-)

data high (CAN H)

CDN366 Setup & Configurations:

Prior to the setup and configuration of the CDN366 device, the PLC hardware (power supply, CPU, DeviceNet scanner, I/O modules), software (RSLinx, RSNetWorx & RSLogic500) and interface modules must be setup and configured first. (For further information on setup and configuration of the Allen Bradley PLC controller, please visit

www.ab.com)

In this particular example, the hardware and software were setup and configured based upon page 1 listing. The figures below demonstrate that the RSNLinx and RSNetWorx are running. The DeviceNet scanner module scanned the network and found node 00 (master DeviceNet scanner) and node 03 (slave interface module). It is recommended to setup the DeviceNet master scanner module to MAC-ID 00. The maximum number of nodes on the DeviceNet network is 64, with a MAC-ID ranges of 00~63.

In order to integrate the CDN366 to DeviceNet network, the CDN366 must be set up and configured first. CDN366 must be disconnected from the DeviceNet network

before configuring the node address and baud rate. Set the DeviceNet baud rate to match

with the network baud rate. Set the Mac ID to an unused node address. The example below shows that the CDN366 was set at Mac ID 01 (MSD=0, LSD=1), and DeviceNet network baud rate is at 125Kb.

RS-232 9 pin DIN male connector

Connect to serial perhiphial

Micro-style male connector 5 pin to DeviceNet network

Connect the CDN366 to the DeviceNet network and click on the “network scan” (Online icon). The DeviceNet master will scan the network. The CDN366 is not registered. Therefore, RSLinx and RSNetworx do not recognize the device.

Online

In order to register the CDN366 on RSNetWorx, click on “Tools” and select “EDS Wizard”. Click on “Next>” and the “Options” menu is prompted.

Select “Register an EDS file(s)” and click on “Next>”

Select “Register a single file” and enter the EDS file name on the white box. Click on “Next>”

The “EDS File Installation Test Results” menu is prompted, click on “Next>”. The “Change Graphic Image” menu is prompted. Select CDN366 and click on “Change icon”.

Select another icon to replace current CDN366 icon. Click “OK” to exit “Change Icon” menu. After it is changed to a new icon, click on “Next>”.

The “Final Task Summary” menu is prompted, click on “Next>”

The “Completing the EDS Wizard” menu is prompted. Click on “Finish” to complete the EDS Wizard. On RSLinx and RSNetWorx, click on the “Online” icon to re-scan or browse the network. The CDN366 should be identified on the RSLinx and RSNetWorx network. If after registering the EDS file, the CDN366 is unrecognized on the DeviceNet

network (see the Troubleshooting Guide on page 35).

CDN366 Parameter Configuration:

Now, the CDN366 is on the DeviceNet network. To change the CDN366 parameters, ensure that the CDN366 device is not on the DeviceNet master scanlist. To edit the

parameters on CDN366, point the mouse to CDN366 icon and right click.

When the sub-menu is prompted, click on “Properties” and the “CDN366” menu appears. Select “Parameters”, and the “EDS Editor” sub-menu is prompted. Click on “Upload”, and the default parameters will upload from CDN366 device.

Download parameters to device Help for the selected parameter Upload parameters from device Restore default parameters Monitor Parameters

The CDN366 has eight (8) Rx/Tx instances. The total number of parameters are 155. On the “Groups” selection, click on the “down arrow key” and then select “Serial Stream Object”, “Rx Inst 1” or “Tx Inst 1”.

Change Parameter Setting Using RSNetWorx:

The CDN366 must be offline (not on Scanlist) to change any parameters. Some of the parameters cannot be change, but can be read (see CDN366 DeviceNet Specifications for details). Before making the parameter change, always upload the current parameters from the CDN366 device.

1) In the “Parameters” menu, double click on the parameter, and enter the new

value. Then press “Enter” to accept the new value.

2) Click on “Apply” and click on “Yes” to download new changes to CDN366.

Another method for changing the parameters on CDN366 is using RSNetWorx.

1) Point mouse to CDN366 icon and right click. The sub menu is prompted.

2) Click on “Class Instance Editor”, and the “WARNING!” alert menu is

prompted.

3) Click on “Yes” to access the class instance editor menu.

Service Code:

set new/current parameters for a single or a group of attributes.

Object Address:

particular class, instance and attribute to verify or change parameter setting.

Used to verify or

Enters a

Set data in decimal or hexadecimal value.

Serial Stream Object Parameters (Class Code 64):

1) Baud Rate: The serial channel RS232 baud rate ranges from 300 ~ 57600 bits/sec.

The acceptable baud rate are 300, 1200, 2400, 4800, 9600, 19200, 38400, and

57600. The baud rate should be set to match the serial connection.

2) Data Bits: The number of data bits can be selected at 7 or 8 bits. The data bits

should be set to match the serial connection.

3) Parity: The parity bit can be selected at None, Odd, Even, Mark or Space. The

parity bit should be set to match the serial connection.

None = no parity Odd = parity bit =1, if there are odd number of one in data size Even = parity bit =1, if there are even number of ones data size. Mark = parity bit is 1 always Space = parity bit is 0 always

In most applications, parity bit is set at None (no parity).

4) Stop Bits: The stop bits can be selected at 1 or 2. Each data byte (character)

transmitted in a sequence is followed by 1 or 2 extra zero bits. The extra “0” is marked at the end of a character transmission. In most applications, the stop bit is set at 1. The stop bits should be set to match the serial connection. 1 = Each data byte (character) transmit is followed by one zero (0). 2 = Each data byte (character) transmit is followed by two zeros (0).

5) Flow Control: The flow control can be set at 0, 1, or 2. When flow control is set

to 1, the X-Off (CTRL S) will force the CDN366’s transmit function to block. The transmitted characters are stored in the FIFO buffer until transmission is reenable by sending the X-On (CTRL Q) character to the CDN366. When the receive FIFO buffer is full, the X-Off character is transmitted to the RS232 interface. The X-On/ X-Off flow control characters are extracted from the data stream. Therefore, this setting is unsuitable for making binary data transmissions. When flow control is set to 2, the RTS (pin 7) and CTS (pin 8) control signals are enabled. The data is transmitted only when the CTS signal asserts a high/low voltage. When the receive FIFO buffer is not full, the RTS signal is asserted to allow data reception. 0 = No flow control 1 = X-On/X-Off flow control (software flow control) 2 = CTS / RTS flow control (hardware flow control)

In most applications, the flow control is set to 0 (no flow control).

6) Delimiter Mode: The delimiter is used to determine when the a complete packet is received from the RS232 side (see DeviceNet for further info.). There are three functions in delimiter mode: List, Timeout

and Length.

List – select “List” when using the injunction with Pre and Post Short String data

type format. The Pre/Post delimiters can be set in ASCII characters. Pre-delimiter

is a character or list of characters (short string data type range 1~256 bytes) that trigger CDN366 to read the beginning of a data packet. Post-delimiter is a character or list of characters (short string data type range 1~256 bytes) that trigger CDN366 to read the end of a data packet.

Example: The data packet looks like this => [STX][Barcode data][ETX][CR]

STX (start of text) =ASCII 0x02, ETX (end of text) = ASCII 0x03, CR (carriage return) = ASCII 0x13

STX= Pre-delimiter (Class=64, Instance=1, Attribute=11) ETX + CR = Post-delimiter (Class=64, Instance=1, Attribute=12)

Setting Pre/Post delimiters: All values are in ASCII unit.

Pre-delimiter (Class=64, Instance=1, Attribute=11) = 01 02

Pos-delimiter (Class=64, Instance=1, Attribute=12) = 02 03 13

First byte is defined as bytes length in ASCII characters. The 01 is equivalent to 1

byte length, which is in Pre-Delimiter. The 02 is equivalent to 2 bytes length

which is that set in Post-Delimiter.

Timeout – When Timeout Delimiter is enabled, the value is set at Packet Timeout

(Class=64, Instance=1, Attribute=13), which will delay the time to determine

when a package is completed. The Packet Timeout value ranges from 1~255msec.

A poll response message is sent, if either the Packet Length or Post Delimiter is

not received within the time specified in the Packet Timeout.

Packet Timeout – Specifies the amount of time in milliseconds (1~255msec)

between bytes that CDN366 uses to determine when the data packet is complete.

Length – When a value (byte range from 1~255) is set in the Packet Length,

(Class=64, Instance=1, Attribute=14) the data packet is fixed based upon the

Packet Length. As the data packet receives from a poll response, the data packet is

complete as number of bytes sent is equal to the byte value set in Packet Length.

Packet Length – Specifies the number of bytes (1~255 bytes) to wait for before

determining the data packet is complete.

7) Serial Status: The serial status indicates whether the serial Receive/Transfer on RS232 has errors. When an error has occurred in the serial status, a bit is set for the error. Set any of these bits to zero, and it will clear the particular error.

8) Poll Produce Size: This attribute can be accessed as read only. The produce size

is defined as the number of Rx data bytes plus two handshaking bytes. One

handshaking byte is for Transmit Acknowledge, which confirms the data

transmitted in instances 1 to 8. Bit 0 is set for transmit acknowledge in Instance 1.

Bit 1 is set for transmit acknowledge in Instance 2 and etc. The other handshaking

byte is for the Receive Toggle, which toggle instances 1 to 8. Bit 0 is set for

receive toggling in Instance 1. Bit 1 is set for receive toggling in Instance 2 and so

on (see Serial Receive/Transmit & I/O Mapping section). When Poll I/O

Connection is established with Allen Bradley 1747-SDN DeviceNet master

scanner, the produce size number of bytes will map into discrete Input data

memory or M file table.

9) Poll Consume Size: This attribute can be accessed as read only. When

establishing a short string data type I/O connection, the produce size is defined as

the number of Tx data bytes plus two handshaking bytes. One handshaking byte is

for Transmit Toggle for instances 1~8. The other one handshaking byte is for

Receive Acknowledge for instances 1~8, (see Serial Receive/Transmit & I/O

Mapping section). When Poll I/O Connection is established with Allen Bradley

1747-SDN DeviceNet master scanner, the consume size bytes will map into

discrete Output data memory or M file table.

Serial Receive Object Parameters (Class Code 65):

There are eight identical receive (Rx) instance parameters which can be set in CDN366. This section will review one of the eight receive instance parameters. These parameters can easily be changed using RSNetWorx. When using RSNetWorx to upload the parameters, first go to “Groups” and select “Rx Inst 1”.

10) Receive Toggle: This parameter is read only. When new data has been received, bit 0 is toggle (see Receive

Handshaking & I/O Mapping).

11) Receive Acknowledge: The value

in this parameter ranges from 0~1 bit. In the poll response, this value must match with the Receive Toggle bit to receive new serial data on the DeviceNet. The Sync Enabled attribute must be enable when using this attribute (see Receive Handshaking&

I/O Mapping).

12) Receive Mode: Bits 3~7 are

unused (label Xs). When a bits 0~2 are set to 1, their function is enabled.

Receive Mode ( class=65, instan ce=1, attribut e=6)

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0

unused unused unused unused unused Use Post Use Pre Us e Dat a

Use Data (bit 0): Normally, this parameter bit is set to 1. When it is enabled, the

packet data is extracted to transmit to DeviceNet.

Use Pre-String (bit 1): When this parameter bit is set to 1, the pre-string ASCII

characters (bytes) will be removed before the PLC receives data from DeviceNet.

Pre-string characters are the ASCII characters found before the serial data.

Use Post-String (bit 2): When this parameter bit is set to 1, the post-string ASCII

characters (bytes) will be removed before the PLC receives data from DeviceNet.

Post-string characters are the serial ASCII characters found after the data.

13) Date Type: When 194 or 198 is entered for Data Type (class=65, instance=1,

attribute=9), then one byte will be allocated for Data Size (class=65, instance=1,

attribute=10). When 195 or 199 is entered for Data Type, then two bytes will be

allocated for Data Size. When 202 is entered for Data Type, then four bytes will

be allocated for Data Size.

Decimal Hex. Date Size (b yt e) Value Range

194 0xC2 1 -128 ~ 127 195 0xC3 2 -32768 ~ 32767

198 0xC6 1 0 ~ 255 199 0xC7 2 0 ~ 65535 202 0xCA 4 218 0xDA Short_String Set by data size attribute, M ax. 255 bytes

SINT (signed 8- bit integer) INT (signed 16-bit integer)

USINT (unsigned 8- bit integer) UINT (unsigned 16-bit integer)

REAL (32-bit floati ng point value)

Data Type

1.175E-38 ~ + 3.4028E+38

The Short-String data type is used in most applications. Short-String data type is used to transfer serial data in ASCII format.

Example: When a barcode reader sent data, “12345678” to CDN366, CDN366 converted the numbers to DeviceNet signal and send it to PLC. In the PLC memory Input I/O table or M-file (must copy to N-integer to be able to view), the data received is listed as ASCII format “812345678” or Hex format “38 31 32 33 34 35 36 37 38”.

14) Data Size: The data size (class=65, instance=1, attribute=10) is settable only if

the Data Type (class=65, instance=1, attribute=9) is Short-String. The maximum

number of ASCII characters (bytes) is 256.

15) Width: This attribute is not applicable for Short-String data type. The maximum

settable width (class=65, instance=1, attribute=11) for a real or integer data type

is 16.

Example: In order to receive a real value as “-1.2345E-16”, the width should be

set to at least 11. When the width is set to 7, the received real value is “-1.2345”.

16) Conversion: The conversion (class=65, instance=1, attribute=13) is valid only

when the Data Type is an integer type. The conversion can convert from

hexadecimal (X) to decimal (d) or vice versa. The attribute is settable to

“D”=0x44 (Hex.) for decimal and “X”=0x58 (Hex.) for hexadecimal.

17) Data In Poll Response: When data in the poll response is set to 1 (enable), the

Receive Data packet (bytes) of a particular instance is added in the CDN366’s

Poll Response. Any particular Rx instances, which are unused, must be disabled.

The data in the poll response attribute must be enabled to establish an I/O

connection with the master scanner (see Input Memory Table of A-B 1747-SDN

mapping).

18) Enable: When the enable search receive string is set to 1, the current instance will

be used to process the incoming receive message (packet) to extract the data

specified in Data Type. This attribute should be disabled for all unused instances.

19) Sync Enabled: When sync enable is set to 1, the CDN366 will not respond with

new serial data until the value in the Receive Acknowledge bit has been toggled.

Enabling this attribute ensures that the master scanner module does not miss data

between polls.

Serial Transmit Object Parameters (Class Code 66):

There are eight replicate independent transmit (Tx) instances, which can be set in CDN366. This section is using RSNetWorx to review one of eight transmit instances in CDN366.

20) Transmit Toggle: The transmit toggle byte for 8 instances are mapped to 1747-SDN Output I/O table. Instance 1 transmit toggle is bit 0. Bit 0, one of the eight bits, which toggles between 0 & 1. When bit 0 is toggled, the data is sent out to RS232 side of CDN366 (see Transmit Handshaking &

I/O Mapping).

21) Transmit Acknowledge: The

transmit acknowledge byte for 8 instances are mapped to 1747-SDN Input I/O table. The information can be accessed as read only. Instance 1 transmit acknowledge is bit 0. Bit 0, one of the eight bits, which toggles between 0 & 1. When bit 0 is toggled, data has been transmitted (see Transmit Handshaking & I/O Mapping).

Note that Tx Ack., Tx toggle, Rx Ack., and Rx Toggle are attributes used in the poll command and poll response to control the serial/DeviceNet data transfer and do not need to be set explicitly as part of the CDN366 setup.

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Rockwell Automation CDN366 Application Notes

Specifications and Main Features

Frequently Asked Questions

User Manual