Rockwell Automation DEVICENET 1771-SDN, User Manual

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1 Publication 1771-6.5.132 - June 2000
Chapter
2
Planning Your Configuration and Data
Mapping Your Devices
This chapter introduces questions you should ask before configuring
your 1771-SDN Scanner. In addition, it presents an example DeviceNet
network and I/O data mapping scheme for a photoeye and a
RediSTATION operator interface module. The following table
identifies what this chapter covers and where to find specific
information.
What You Need to Know
To map data via your 1771-SDN Scanner module, you must
understand:
•
your network requirements
•
how input data is mapped
•
how output data is mapped
Beginning the Process
Planning before configuring your 1771-SDN module helps make sure
that you can:
•
use your memory and bandwidth efficiently
•
cater to device-specific needs and requirements
•
give priority to critical I/O transfers
•
leave room for expansion
For information about See page
What You Need to Know 2-1
Beginning the Process 2-1
The Example Network 2-2
Example Network Devices 2-2
Photoeye Input Data Mapping 2-7
Mapping Photoeye Input Data for a Block Transfer Read 2-8
RediSTATION Operator Interface Data Mapping 2-4
Mapping RediSTATION Input Data for a Block Transfer Read 2-5
Mapping RediSTATION Output Data for a Block Transfer Write 2-6