Allen-Bradley 1769-SDN User Manual

Publication 1769-UM009B-EN-P - May 2002
1-4 Overview
Communicating with Your
Slave Devices
The scanner communicates with devices via strobe, poll, change of
state, and/or cyclic I/O messages. It uses these messages to solicit data
from or deliver data to each device. Data received from the devices, or
input data, is organized by the scanner and made available to the
controller. Data sent from your controller, or output data, is organized
in the scanner and sent on to your devices.
• A strobe message is a multicast transfer of data (which is 64 bits
in length) sent by the scanner that initiates a response from each
strobed slave device. The strobe devices respond with their data,
which can be as much as 8 bytes of information. As a slave
device, the scanner does not support the strobe message.
• A poll message is a point-to-point transfer of data (0 to 128
bytes) sent by the scanner to the slave device. The poll message
also initiates a response from each poll slave. The slave device
responds with its input data (0 to 128 bytes).
• A change of state message is a transfer of data sent whenever a
data change occurs. A user-configurable heartbeat rate allows
devices to indicate proper operation during intervals between
data changes.
• A cyclic message is a transfer of data sent at a specific
user-configurable rate, such as every 50 ms.
In addition to I/O messaging, the scanner also supports PCCC and CIP
explicit messaging, defined later in this manual.
IMPORTANT
Throughout this document, input and output are
defined from the controller’s point of view. Output is
data sent from the controller to a device. Input is
data collected by the controller from a device.

Allen-Bradley 1769-SDN Specifications

General

Manufacturer	Allen-Bradley
Product Type	DeviceNet Scanner
Series	1769
Communication Protocol	DeviceNet
Input Voltage	24V DC
Current Consumption	100 mA
Number of DeviceNet Nodes	63
Shock	30 g
Power Consumption	2.4 W
DeviceNet Baud Rates	125 kbps, 250 kbps, 500 kbps
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 85°C
Relative Humidity	5% to 95% (non-condensing)
Weight	0.2 kg
DeviceNet Connector	5-pin removable terminal block
Compatibility	CompactLogix 1769 I/O platform

Summary

Chapter 1: Overview of 1769-SDN Module

What Your Scanner Does

Communicating with Slave Devices

RSNetWorx Software as Configuration Tool

Describes how RSNetWorx software is used for configuring the scanner and its slave devices.

Chapter 2: Quick Start for Experienced Users

What You Need To Do for Quick Start

Chapter 3: Installation and Wiring

Power Requirements

Installation Safety and Planning

Chapter 4: Configuring the DeviceNet Network

Software Compatibility and Installation

Lists compatible software versions and provides installation instructions for configuration tools.

DeviceNet Driver Configuration with RSLinx

Step-by-step guide to setting up the DeviceNet communication driver within RSLinx.

Network Configuration with RSNetWorx

Covers scanlist setup, node addressing, I/O device configuration, parameters, ADR, and saving.

Chapter 5: DeviceNet I/O Image Structure

Input File Structure and Status

Details the input file structure, including status areas, failure arrays, and idle/active node status.

Module Status and Input Data Mapping

Output Array Structure and Mapping

Describes the output array, module command array, and mapping of controller output data.

Chapter 6: Using 1769-SDN with CompactLogix Controllers

Configuring DeviceNet System with RSNetWorx

Procedures for assigning node addresses and mapping adapter I/O into the scanner.

Creating CompactLogix Project for 1769-L30 Controller

Guide to creating a project in RSLogix 5000, configuring I/O modules, and setting up tags.

Calculating Maximum I/O Sizes and Usage

Chapter 7: Using 1769-SDN with MicroLogix Controllers

MicroLogix 1500 Controller Compatibility and RSLogix 500 Setup

Discusses compatibility, RSLogix 500 configuration, project setup, and I/O screen details.

1769-SDN Scanner Configuration and Parameters

Details scanner configuration, changing settings, ignoring errors, and Series/Revision information.

Messaging Protocols and Upload/Download

Covers backplane messaging, PCCC, CIP protocols, and procedures for program upload/download.

Configuring Local DeviceNet Messages

Chapter 8: Troubleshooting

Diagnostic Indicators Overview

Troubleshooting LEDs and Numeric Display

Table summarizing LED status, indications, and recommended actions for troubleshooting.

Error Codes and Recommended Actions

Lists error codes displayed by the numeric display and provides solutions for each.

Appendix A: Product Specifications

Electrical and DeviceNet Specifications

Appendix B: 1769-SDN DeviceNet Class Codes