Western Reserve Controls 1782-JDC Manual de usuario

1782-JDC

DeviceNet Serial Gateway

User’s Manual

estern

eserve

ontrols, Inc.

Western Reserve Controls, Inc. 1782-JDC User’s Manual

Although every effort has been made to insure the accuracy of this document, all information is

subject to change without notice. Western Reserve Controls, Inc. assumes no liability for any

errors or omissions in this document or for direct, indirect, incidental or consequential damage

resulting from the use of this document.

Document 25.0

Rev 5.13

September 2011

Western Reserve Controls, Inc.

1485 Exeter Road

Akron OH 44306

330-733-6662 (Phone)

330-733-6663 (FAX)

sales@wrcakron.com (Email)

http://www.wrcakron.com (Web)

WRC is a trademark of Western Reserve Controls, Inc.

DeviceNet is a trademark of ODVA, Inc.

All other trademarks are property of their respective companies.

Western Reserve Controls, Inc. 1782-JDC User’s Manual

TABLE OF CONTENTS

OVERVIEW........................................................................................................................................................4

1.1

FEATURES .........................................................................................................................................................5

1.2

PRODUCT FAMILY SELECTION ...........................................................................................................................5

1.3

DEVICENET SYSTEM ARCHITECTURE................................................................................................................ 5

1.4

BASIC OPERATION............................................................................................................................................. 6

1.4.1

Polled I/O.....................................................................................................................................................6

1.4.2

Explicit Messages......................................................................................................................................... 6

1.4.3

Cyclic Input Message...................................................................................................................................6

1.4.4

Change-of-State, or COS .............................................................................................................................7

1.5

DEFAULT DEVICE CONFIGURATION ...................................................................................................................7

1.6

PRODUCT VERSION AND EDS ............................................................................................................................7

QUICK START...................................................................................................................................................8

2.1

HOW TO INSTALL AND ESTABLISH DEVICENET COMMUNICATIONS...................................................................8

2.2

HOW TO CHANGE THE NODE ADDRESS .............................................................................................................8

2.3

HOW TO CHANGE THE BAUD RATE ...................................................................................................................8

2.4

HOW TO INSTALL A SERIAL NETWORK ..............................................................................................................9

2.5

HOW TO READ SERIAL DEVICE INPUT DATA FROM THE JDC............................................................................. 9

2.6

HOW TO WRITE SERIAL OUTPUT DATA TO THE JDC .......................................................................................10

GENERAL SPECIFICATIONS ...................................................................................................................... 12

HARDWARE INSTALLATION AND SET-UP ............................................................................................14

4.1

OVERVIEW ......................................................................................................................................................14

4.2

LED OPERATION............................................................................................................................................. 15

4.2.1

DeviceNet LEDs.........................................................................................................................................15

4.2.2

Serial Port LEDs........................................................................................................................................ 15

4.3

SERIAL PORT CONNECTOR ..............................................................................................................................16

4.4

DEVICENET CONFIGURATION.......................................................................................................................... 16

4.4.1

DeviceNet Network Termination................................................................................................................16

4.4.2

DeviceNet Connection Wiring....................................................................................................................17

4.4.3

RS485 Network Termination (1782-JDC-2) .............................................................................................. 17

SOFTWARE CONFIGURATION AND SET-UP ......................................................................................... 18

5.1

SETTING UP SERIAL COMMUNICATIONS........................................................................................................... 20

5.1.1

Setting up the serial link baud rate ............................................................................................................20

5.1.2

Setting up the receive delimiter..................................................................................................................20

5.1.3

Setting up the transmit delimiter................................................................................................................20

5.1.4

Setting up the Data Frame Format ............................................................................................................ 21

5.1.5

Setting up the Receive Character Buffer Length........................................................................................ 21

5.1.6

Setting up the Transmit Character Buffer Length......................................................................................21

5.1.7

Setting up the Pad Mode............................................................................................................................21

5.1.8

Setting up the Pad Character..................................................................................................................... 22

5.1.9

Using the Swap Bytes Mode....................................................................................................................... 22

5.1.10

Transmitting Serial Data ....................................................................................................................... 23

5.1.11

ASCII Receive Data and Pad Mode.......................................................................................................23

5.2

SETTING UP DEVICENET COMMUNICATIONS ...................................................................................................24

5.2.1

Polled I/O...................................................................................................................................................24

5.2.2

Cyclic and Change-of-State I/O................................................................................................................. 24

5.2.3

Setting up the DeviceNet I/O Connections................................................................................................. 25

5.2.4

Setting up the Connection Timer (EPR).....................................................................................................25

Western Reserve Controls, Inc. 1782-JDC User’s Manual

iii

5.2.5

Autobaud Operation ..................................................................................................................................25

5.2.6

Setting up the DeviceNet Baudrate ............................................................................................................26

A. DEVICENET PROFILE, OBJECTS AND SERVICES....................................................................................27

A.1

1782-JDC DEVICENET PROFILE...................................................................................................................... 27

A.2

SERIAL I/O POLLED DATA FORMATS............................................................................................................... 28

A.3

IDENTITY OBJECT,CLASS 1.............................................................................................................................29

A.4

PARAMETER OBJECT,CLASS F

HEX

(15

DEC

) ......................................................................................................30

A.5

COMMON DEVICENET SERVICES .....................................................................................................................33

B. ACCESSORIES AND OTHER WRC PRODUCTS..........................................................................................34

C. FREQUENTLY ASKED QUESTIONS..............................................................................................................36

D. TROUBLESHOOTING .......................................................................................................................................39

LIST OF TABLES

TABLE 1-1 I/O MESSAGE TYPES..................................................................................................................................... 6

TABLE 2-1 BAUD RATE SELECTION ................................................................................................................................9

TABLE 2-2 DEVICENET CONSUME ASSEMBLY /SERIAL TRANSMIT DATA STRING .......................................................10

TABLE 2-3 SERIAL RECEIVE STATUS/ERROR BYTE ......................................................................................................10

TABLE 2-4 DEVICENET CONSUME ASSEMBLY /TRANSMIT DATA STRING ...................................................................11

TABLE 4-1 MODULE STATUS LED (LABELED MS) .......................................................................................................15

TABLE 4-2 NETWORK STATUS LED (LABELED NS)......................................................................................................15

TABLE 4-3 RS-232/485 CONNECTOR SIGNALS .............................................................................................................16

TABLE 4-4 RS422/485 CONNECTOR SIGNALS.................................................................................................................16

TABLE 4-5 MAXIMUM NETWORK CABLE LENGTHS...................................................................................................... 16

TABLE 5-1 CONFIGURATION PARAMETER LIST............................................................................................................. 19

TABLE 5-2 SERIAL BAUDRATES.................................................................................................................................... 20

TABLE A-1 DEVICENET OBJECTS................................................................................................................................. 27

TABLE A-2 POLL PRODUCE DATA (ASCII RECEIVE STRING) .......................................................................................28

TABLE A-3 POLL CONSUME DATA (ASCII TRANSMIT STRING)....................................................................................28

TABLE A-4 IDENTITY OBJECT CLASS ATTRIBUTES (INSTANCE 0)................................................................................. 29

TABLE A-5 IDENTITY OBJECT INSTANCE ATTRIBUTES (INSTANCE 1) ........................................................................... 29

TABLE A-6 IDENTITY OBJECT COMMON SERVICES ......................................................................................................29

TABLE A-7 PARAMETER CLASS ATTRIBUTES (INSTANCE 0).........................................................................................30

TABLE A-8 PARAMETER INSTANCE ATTRIBUTES (INSTANCES 1-7) ..............................................................................30

TABLE A-9 PARAMETER COMMON SERVICES...............................................................................................................30

TABLE A-10 JDC PARAMETER INSTANCES (CLASS F

HEX

).............................................................................................. 31

TABLE B-1 WRC REPLACEMENTS,SPARE PARTS AND OTHER PRODUCTS ..................................................................35

TABLE OF FIGURES

FIGURE 1-1 1782-JDC....................................................................................................................................................4

FIGURE 4-1 1782-JDC OUTLINE DRAWING ..................................................................................................................14

FIGURE 4-2 DEVICENET CABLE CONNECTOR ................................................................................................................17

Western Reserve Controls, Inc. 1782-JDC User’s Manual

1. Overview

The 1782-JDC is a family of DeviceNet-to-serial link communications gateways that provide a

flexible DeviceNet interface to a wide variety of ASCII devices. The JDC allows the user to

easily and conveniently connect and integrate peripheral products with RS232, RS422 or

RS485 serial ports into a DeviceNet system.

Using the JDC you may communicate with the connected peripheral devices in the same

fashion as the other DeviceNet products in the system. Data may be read/written using either

I/O polling or explicit messaging. Typically real-time data is read and written as I/O by the

DeviceNet Master via Polled I/O and parameters are read and written with the Explicit

Messaging technique.

The 1782-JDC is defined as a Communications Adapter device on the DeviceNet system. It

has a 3-pin plug connector for connection to RS232 (JDC-1) or RS485 (JDC-2) or a 5-pin plug

connector for connection to RS422/485 (JDC-4) interface port on your device and a 5-pin

pluggable DeviceNet connector for connections to the DeviceNet network. The device does

baud rate selection automatically when it is powered up on a network. The 1782-JDC has one

assigned DeviceNet address, which is set by a 6-position DIP switch on the unit. Other JDC

parameters are software-configurable and are changed from their default values by third-party

DeviceNet configuration tools. Each 1782-JDC has 2 standard green/red DeviceNet LED’s for

module status and network status and two green LED’s to indicate RS232/422/485 transmit

and receive activity.

The RS232 version may be used for point-to-point connection to a single serial device. The

RS422/485 version may be connected in a point-to-point fashion to a single device, or to

multiple devices in the standard RS422/485 convention.

The JDC is a general-purpose gateway that is completely device-independent. The JDC does

not interpret the data being transmitted across it, and so the transferred messages may

contain data of any nature or definition. This allows you to use the same device for a wide

variety of DeviceNet-serial interface applications.

This manual applies to 1782-JDC version 5.

Figure 1-1 1782-JDC

Western Reserve Controls, Inc. 1782-JDC User’s Manual

1.1 Features

The 1782-JDC has the following features:

•Translates messages and data between DeviceNet and a serial peripheral device

•ODVA Group 2 Only Slave

•Defined as a DeviceNet Communications Device Profile 12 (C

hex

)

•Autobaud operation

•Polled I/O and Explicit Messaging

•Software Configurable Parameters for serial port operation

•Special mode performs byte swapping of serial message for AB PLC compatibility

•Address selection via DIP switches

•DIN rail mount

•Pluggable 5-pin DeviceNet connection

•Pluggable RS-485 2-pin connection / RS-232 3-pin connection / RS-422 5-pin connection

•2 standard DeviceNet module and network status LED’s

•2 serial transmit and receive LED’s

•Powered from DeviceNet 11-25 Vdc network power

•ASCII string length up to 124 bytes

•Serial port baud rate up to 38.4k baud

•Network electrical isolation

1.2 Product Family Selection

There are 3 members of the 1782-JDC family:

o1782-JDC-1 Isolated RS-232

o1782-JDC-2 Isolated RS-485

o1782-JDC-4 Isolated RS-422/485

1.3 DeviceNet System Architecture

A DeviceNet network is a distributed I/O system that may contain many different products

from several different vendors. Products may be configured uniformly, as clusters or as

distributed clusters. Up to 64 devices, including the master may be attached to a single

DeviceNet network. Any of these, except the master, may be a JDC. A typical system will

include a master, such as a PLC or industrial PC, and multiple slave devices, including a

1782-JDC with connected peripheral devices.

Western Reserve Controls, Inc. 1782-JDC User’s Manual

1.4 Basic Operation

The JDC operates as the DeviceNet front-end to the serial device(s). Connecting the JDC to a

single device, that device can then be assigned by the system implementer to one specific

master. The DeviceNet Master can receive and send data to and from the 1782-JDC via the

methods described in this section. It formats and sends the data to the device and likewise

accepts responses from the device, which are reformatted and passed back to the DeviceNet

system as required.

The JDC has one DeviceNet address. All DeviceNet messages to the JDC itself (to read /

write its internal data) are sent to this address. All DeviceNet messages to and from the serial

device are sent to the JDC DeviceNet assembly objects using poll commands.

The JDC Parameter Object allows you to define the specific operation of each JDC. These

parameters include all the set-up required for the serial comm. link.

The following chart defines the various messaging methods used for “typical” data types at

your serial device and a brief explanation follows.

Table 1-1 I/O Message Types

Typical Data Polled Cyclic Bit-Strobe Change-of-State Explicit Message

Commands √

√√

√

Status √

√√

√

Parameters √

√√

√

1.4.1 Polled I/O

The DeviceNet Master uses the JDC’s predefined polled IO connection to send input and

output data to the JDC. The input data to the JDC has a one-byte record number, a one-byte

length indicator and up to 124 additional bytes of transmit data. When a poll is received and

the record has changed since the last poll was sent, the JDC sends the associated transmit

data out the serial port to the remote ASCII device. When the JDC receives serial data from a

device on the serial link, the poll response data to the Master contains a one byte record

number, then a one byte status number that reflects errors or events on the bus, a one byte

length indicator that is the length of the message in the response and up to 124 bytes of

received data. The record number is incremented in the poll response when new data is

received on the serial link. The status byte is zero if no errors occurred.

1.4.2 Explicit Messages

As mentioned, explicit messages are typically used to read and write configuration data. This

data allows the JDC to change its internal operating parameters such as baudrate and parity.

The JDC does not allow for direct communication to the serial ports using explicit messaging.

1.4.3 Cyclic Input Message

Cyclic I/O is the function by which a slave device sends its input data to the master at a

specific time period without the host explicitly requesting it. When the specified time interval

(defined by you) elapses, the user-specified input data are transmitted to the master. This

data is the same format as a poll response.

Western Reserve Controls, Inc. 1782-JDC User’s Manual

1.4.4 Change-of-State, or COS

COS I/O is the function by which a slave device sends its input data to the master when

defined input data changes without the host explicitly requesting it. In the case of the JDC, this

occurs when the delimiter character is asynchronously received from the serial device. This

data is the same format as a poll response.

1.5 Default Device Configuration

The 1782-JDC DeviceNet address is read from the switches and is set to 63 at the factory. All

other parameters are software settable. The default settings for the 1782-JDC are provided in

the discussion of the Parameter Object.

1.6 Product version and EDS

This manual applies to 1782-JDC-x version 5 and higher. An EDS (Electronic Data Sheet) for

the 1782-JDC, is shipped with your device or is available on WRC’s web site:

http://www.wrcakron.com/.

Western Reserve Controls, Inc. 1782-JDC User’s Manual

2. Quick Start

To quickly install your 1782-JDC in your DeviceNet system, follow the instructions below. For

more details, see Section 4.

2.1 How to Install and Establish DeviceNet Communications

1. Connect your DeviceNet network cable to a 5-pin female (Phoenix-type) plug according to

DeviceNet cable wiring specifications

2. Make sure that the DeviceNet network is terminated properly.

3. The JDC Node Address (MacID) is set to 63 at the factory. Make sure no other device on

the network is set to 63, or change the JDC address to one that is not currently used (see

below).

4. The JDC baud rate is set to Autobaud operation at the factory. See below to change it to a

fixed baud rate if desired.

5. Make sure that there is power on the DeviceNet network and plug the cable into the 1782-

JDC.

6. The 1782-JDC will undergo its initialization sequence, flashing both LED’s red and green.

After approximately 5 seconds, the Module Status LED (labeled “MS”) will flash green.

The Network Status LED (labeled “NS”) will remain off. This condition occurs while the

JDC is attempting to synchronize to the network baud rate.

7. The Module Status LED (“MS”) will go on solid after the Device successfully determines

the network baud rate. This requires devices on the network attempting to communicate

with each other. The Network Status LED (labeled “NS”) will begin to flash green. If it

turns solid red, check for a duplicate MacID on the network. If it remains off, make sure

that there are other devices trying to communicate on the network.

8. Once the Master recognizes the unit on the link and allocates the connection (initiates

communications), The Network Status LED will be solid green. The device is now being

actively scanned.

9. The 1782-JDC is now operating on the network.

2.2 How to Change the Node Address

1. Set the 6-position DIP switch to the binary number representing the desired Node

Address, 0-63. (Note: Address 0 is often reserved for a Master device.)

2. Power cycle the unit by unplugging and reconnecting the DeviceNet cable.

NOTE: T

he new address will not become effective until the unit is power cycled or a

Reset command is received from the Master.

2.3 How to Change the Baud Rate

The Baud Rate is set to autobaud at the factory. The baud rate can be changed through your

configuration tool in its normal manner to any baud rate except autobaud. This is due to the

fact that autobaud is not provided for in the DeviceNet specification. If you need to set the

Western Reserve Controls, Inc. 1782-JDC User’s Manual

baud rate to autobaud, you must do it via the parameter object. The definition is included in

the EDS file for easy configuration. Just use your configuration tool to access the device

parameters. The baud rate is parameter 7. Select the proper baud rate and upload the

parameter to the device. If your configuration tool does not support EDS parameter

configuration, you will have to perform the operation manually. To do this, set the parameter

Class 15 (F

hex

), instance 7, attribute 1 to the value in Table 2-1.

NOTE:

If you change the baud rate, the new baud rate will not become effective until the

unit is power cycled or a reset command is received by the Identity Object (Class 1,

Instance 0, reset).

Table 2-1 Baud Rate Selection

Baud Rate

Value

Baud

Rate

0 125k

1 250k

2 500k

3 Autobaud

2.4 How to Install a Serial Network

1. The communication between your serial device(s) and the 1782-JDC is a RS232 3-wire,

RS485 2-wire or 5-wire RS422/485 differential network. Connect an appropriate cable to

your device.

2. Connect the other end of the cable to the JDC using the 3-point or 5-point terminal plug

provided. Note the terminal markings on the JDC case. See Figure 4-1.

3. Turn on power to the serial device and the JDC.

4. Set up the ASCII buffer sizes on the JDC. (The defaults are 20 and 20). If more than 20

bytes are required for the transmit or receive buffers, set parameters 5 and 6 in your

configuration file to the buffer size you need for your ASCII data (NOTE: this will modify

the IO message size. You will need to reconfigure the poll / COS / cyclic transmit and

receive data sizes if you modify the ASCII buffer size from the default value. In many

configuration tools, this will unmap the data in your scanner’s scan table. They must be

remapped in order to be able to process the data in your PLC or software) These

parameters can be reached in the Parameter Class 15 (F

hex

), Instances 5 and 6, Attribute

1 if you need to configure these manually (See Table A-10).

2.5 How to Read Serial Device Input Data from the JDC

1. Set up the receive size of your connection to equal the (Max Number of Receive Chars

+ 3) in your Master’s scan table. The default value should be 23 (20+3).

2. Map the data from your IO response to your scanners memory map. The device’s

response is byte aligned. The first byte indicates the receive record of the data. The

second byte contains the JDC's serial status indicator (00 is normal). The third byte

contains the length of the message being transmitted by the JDC. The subsequent bytes

contain the serial buffer data from the serial input until and including the latest received

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