Allen-Bradley SLC 500 DeviceNet, User Manual, Page: 33 / 139

Publication 1747-6.5.5 - August 2000
Planning Your Configuration and Data Mapping Your Devices 2-5
Mapping RediSTATION Input Data for an M1 File Data Table Read
The following is an example of input data mapping for the
RediSTATION.
1
2
The bits for the RediSTATION
operator interfaces’s red and green
buttons are mapped into the
1747-SDN Scanner’s M1 data table
file.
What’s Happening?
The M1 file is then transferred to
the SLC 500 processor’s input
data file.
Important : The 1747-SDN module only
makes the data file available for the
processor to read. The 1747-SDN does
not move the data file to the processor.
R = bit for red button (STOP)
G = bit for green button (START)
N7:0 0000 0000 0000 00 GR
N7:1 0000 0000 0000 0000
N7:2 0000 0000 0000 0000
N7:3 0000 0000 0000 0000
Word 0
Word 1
Word 2
Word 3
Word 4
Up to
Word 61
The red STOP button from the
RediSTATION appears in the SLC 500
processor’s input file at address N7:0/0.
N7:4 0000 0000 0000 0000
RediSTATION Input Byte
= unused bits
1
1747-SDN Scanner M1 File Data Table
1 byte G R
2
G R
1
This mapping is based upon the example in chapters 4
and 6. The mapping for your system may be different.
SLC 500 Processor
Input Data File
1
Note:
N7:149 0000 0000 0000 0000
Example: The green START button from
the RediSTATION appears in the SLC 500
processor’s input file at address N7:0/1.