Rockwell Automation DEVICENET 1771-SDN, User Manual

Page: 67 / 139

Publication 1771-6.5.132 - June 2000
Configuring the DeviceNet Network 4-15
The resulting device mapping will appear in the lower panel of the
window:
In this example, the input byte from the RediSTATION will appear
in the PLC-5 processor in file N9, word 1, as bits 0-7. Recall from
chapter 2 that the START button is bit 1 and the STOP button is bit
0. Therefore, the addresses for the RediSTATION inputs are:
START N9:1.1
STOP N9:1.0
The input byte from the photoeye will appear in the PLC-5
processor in file N9, word 1, as bits 8-15. Recall from chapter 3 that
the input bit is bit 0. Therefore, the address of the photoeye input
bit is:
N9:1.8
3. Note the addresses assigned to the START and STOP buttons
and the photoeye in your system. You will enter these addresses
in the example ladder program.
RediSTATION
inputs
Photoeye
inputs
File N9,
Word 1
Note: The source address is actually
determined by the block transfer
instruction in the ladder logic. See
chapter 6.