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
Chapter 4
Module Configuration
4–7
Clear On Fault (SW2-3)
!
ATTENTION: Before setting SW2-3 to ON, make sure that
holding all DCM input bits in their last state, in the event a
communication error occurs, does not create an unsafe condition
in the distributed SLC processor.
Clear On Fault SW2-3
Yes OFF
No ON
Turn switch to OFF position if you want the DCM to clear and hold clear all
data bits in its input image table, in the event of an RIO communication
failure or when the supervisory processor enters Program/Test/Fault Mode.
Status bits will not be cleared.
Turn switch to ON position if you want the DCM to hold all input data bits in
their last state when an RIO communication failure occurs or when the
supervisory processor enters Program/Test/Fault Mode.
Data Rate (SW2-1 and SW2-2)
Data Rate SW2-1 SW2-2 Cable Length (Belden 9463)
57.6K baud ON ON 3048 meters (10,000 feet)
115.2K baud ON OFF 1524 meters (5,000 feet)
3b
OFF ON
7r f
2
3
0.4K
b
aud
OFF OFF
7
62 mete
r
s (2,500
f
eet)