User Manual Manual

87Publication 1769-UM009E-EN-P - August 2009 87
Chapter 6
DeviceNet I/O Image
Introduction
This chapter describes the input and output data structure. This table describes
what this chapter contains and where to find specific information.
1769-SDN Input Structure
The 1769-SDN scanner module’s input image is configurable up to 246 words.
The input image is broken into two primary components, the status area and
the input data area.
Topic Page
1769-SDN Input Structure 87
MicroLogix 1500 Status Structure 88
Module Status Register 93
CompactLogix Status Structure 94
CompactLogix Status Register 98
CompactLogix Command Register 100
Input Data Image 102
1769-SDN Output Structure 102
Input Image
Name Size Word Offset
Status Structure 66-words (fixed) 0…65
Input Data Image 180-word array (configurable) 66…245