Allen-Bradley SLC 500 DeviceNet, User Manual, Page: 29 / 139

1 Publication 1747-6.5.5 - August 2000
Chapter
2
Planning Your Configuration and Data
Mapping Your Devices
What This Chapter Contains This chapter introduces questions you should ask before configuring
your 1747-SDN communication module. 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 1747-SDN communication module, you must
understand:
•
your network requirements
•
how input data is mapped
•
how output data is mapped
Beginning the Process
Planning before configuring your 1747-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
RediSTATION Input and Output Data Mapping 2-4
Mapping RediSTATION Input Data for an M1 File Data Table Read 2-5
Mapping RediSTATION Output Data for an M0 File Data Table Write 2-6
Photoeye Input Data Mapping 2-7
Mapping Photoeye Input Data for an M1 File Data Table Read 2-8