Rockwell Automation 1747-DCM Direct Communication Module - Manual (Page 10)

10 Direct Communication Module
Publication 1747-IN005B-EN-P - March 2003
Starting I/O Group Number (SW1-7 and SW1-8)
The starting I/O group number must be an even number from 0 to 6 (e.g. 0, 2, 4, or
6) and is dependent upon whether the 1747-DCM has been configured as a full, ¾,
½, or ¼ chassis. The first word transferred is always the status word for the
1747-DCM.
The table below shows the switch settings for the starting I/O group numbers.
DIP Switch 2 Settings
The default settings are shown below.
Data Rate (SW2-1 and SW2-2)
Starting I/O Group Number SW1-7 SW1-8 Valid Chassis Configuration
0 ON ON All
2 ON OFF ¾, ½, ¼
4 OFF ON ½, ¼
6 OFF OFF ¼
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 1542 meters (5,000 feet)
230.4K baud OFF ON 762 meters (2,500 feet)
OFF OFF
O N
8
12
3
4
5
6
7
Reserved
Rack Size
Last Rack
Clear On Fault
Data Rate