Rockwell Automation 1747-SDN SLC 500 DeviceNet Scanner Module User Manual User Manual

Page 27

Publication 1747-UM655B-EN-P - June 2007

Planning Your Configuration and Data Mapping Your Devices 27

Mapping RediSTATION Input Data for an M1 File Data Table Read

The following is an example of input data mapping for the
RediSTATION operator interface.

RediSTATION Input Byte

The bits for the RediSTATION
operator interfaces’s red and green
buttons are mapped into the
1747-SDN module’s M1 data table
file.

The M1 file is then transferred to
the SLC 500 processor’s input
data file.

What’s Happening?

Important: The 1747-SDN module only
makes the data file available for the
processor to read. The 1747-SDN
module does not move the data file to
the processor.

SLC 500 Processor

Input Data File

N7:0

N7:1

N7:2

N7:3

N7:4

N7:149

0000 0000 0000 00GR

0000 0000 0000 0000

R = Bit for Red Button (STOP)
G = Bit for Green Button (START)

1 byte

G R

= Unused Bits

1747-SDN Module M1 File Data Table

G R

Word 0

Word 1

Word 2

Word 3

Word 4

Up to
Word 61

This mapping is based upon the example in

chapters 4 and 6. The mapping for your system
may be different.

Example: The green START button from the
RediSTATION operator interface appears in the
SLC 500 processor’s input file at address
N7:0/1.

The red STOP button from the RediSTATION
operator interface appears in the SLC 500
processor’s input file at address N7:0/0.