USER MANUAL 1771-DCM User Manual

Selecting Options
Chapter 3
36
Switch
I/O Rack Number (Octal) 1 2 3 4 5 6
30 ON OFF OFF ON ON ON
31 ON OFF OFF ON ON OFF
32 ON OFF OFF ON OFF ON
33 ON OFF OFF ON OFF OFF
34 ON OFF OFF OFF ON ON
35 ON OFF OFF OFF ON OFF
36 ON OFF OFF OFF OFF ON
37 ON OFF OFF OFF OFF OFF
Switches 7 and 8  First (Starting) Module Group Number
First Module Switch
Group Number 7 8
0 ON ON
2 ON OFF
4 ON ON
6 OFF OFF
Assign a unique stating module group number--such as 0, 2, 4, or 6--in
accordance with the number of chassis you assigned to the same I/O rack
number. You can assign from one to four 1771-DCMs and I/O adapters to
the same I/O rack number, provided that the combination does not exceed
a full rack. For example, assign starting module group numbers to each
I/O chassis or 1771-DCM in the following combinations:
Rack Configuration Assign Module Group Numbers
• Four 1/4 Racks
0, 2, 4, and 6
• T wo 1/2 Racks
0 and 4
• One 1/4 and One 3/4 Rack
0 and 2
• One 3/4 and One 1/4 Rack
0 and 6
You selected the equivalent rack size of your 1771-DCM with Switch
Bank 0, Switches 7 and 8, above.