8 - application examples, Basic example, Application examples – Rockwell Automation 1747-DCM,D17476.8 Direct Communication Module User Manual
Page 55
8
Chapter
8–1
Application Examples
This chapter provides and examines two applications of the DCM.
•
basic example
•
supplementary example
In the following application, the 1747-DCM in the remote rack 2 will
monitor the 1747-SN data from the local rack 1. The program examples in
both local and remote rack CPUs consist of 1 rung each. When input I:1/0 is
enabled in the local rack, the output O:3.1/0 condition is transferred to the
1747-DCM input image via the 1747-SN output image. This condition
enables O:2/0 in the remote rack output card.
RIO
(Belden 9463)
Й
Й
Й
Й
Й
Й
Й
Й
Й
Й
Й
Й
Rack 1
Rack 2
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
= slot not used
SLC 5/02
Input
Output
SN
P2
Output
DCM
SLC 5/01
P2
Input Switch
1747-SN Module Configuration
➀
Baud Rate =
57.6K baud
G-file Size =
3 words
G-File
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Word 0
Reserved
Word 1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
= Starting Address 0
Word 2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
= 1/4 Rack Size
➀
See SN manual for further details on configuration.
Basic Example