Photoeye Input Data Mapping Example; What's Next - Rockwell Automation Allen-Bradley ControlLogix DeviceNet 1756-DNB User Manual

2-8 Planning Your Configuration and Data Mapping Your Devices
What's Happening?
The status and data bits from
1
each photoelectric sensor are
mapped into the 1756-DNB
module's input data file.
The input data file is then
2
transferred to the Logix5550
controller's input image table.
Important: The 1756-DNB module only
makes the data available for the
controller to read. The 1756-DNB
module does not move the data to the
controller.
Logix5550 Controller
Input Image Table
Address Data
Word 0,L 0000 00SD 0000 0000
Word 0,H 0000 0000 0000 0000
Word 1,L 0000 0000 0000 0000
Word 1,H 0000 0000 0000 0000
Word 2,L 0000 0000 0000 0000
Word 2,H 0000 0000 0000 0000
1
This mapping is based upon the example in
chapter 4. The actual mapping for your system
may be different.

What's Next?

Publication 1756-6.5.19 - May 2000

Photoeye Input Data Mapping Example

Bit
15/31
1
2
Chapter 3 describes how to set up the system hardware for the
example application.
Photoeye Input Byte
1 byte
S D
1
1756-DNB Module Input Data File
S D RediSTATION
= unused bits
Bit
1
0/16
Word 0 Low
Word 0 High
Word 1 Low
Word 1 High
Word 2 Low
Word 2 High
up to
double word
123