User Manual
Table Of Contents
- 1747-6.8, Direct Communication Module User Manual
- Important User Information
- Summary of Changes
- Table of Contents
- Preface
- 1 - Overview
- 2 - Quick Start for Experienced Users
- 3 - Addressing
- 4 - Module Configuration
- 5 - Installation and Wiring
- 6 - Programming
- 7 - Troubleshooting
- 8 - Application Examples
- A - Specifications
- B - DCM Addressing Worksheet
- Index
- Back Cover
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)
Rack 1 Rack 2
= 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