Rockwell Automation 1747-DCM,D17476.8 Direct Communication Module - Manual (Page 33)

Chapter 4
Module Configuration
4–3
Rack Address (SW1-1 through SW1-6)
The rack address refers to the logical rack number from the scanner image
that contains a particular DCMs image.
The table on page 4–4 gives the switch settings that define possible rack
address choices for all scanners. To use this table, first determine which of
the following categories applies to your scanner:
•
PLC-2, mini PLCs, PLC-2/30 with 1772-SD, SD2 remote scanner
•
PLC-3 and PLC-5/250 processors. (This category includes those with
built-in scanners, as well as the following without built-in scanners:
catalog numbers 1775-54A, -54B, -S5, -SR, -SR5 and 5250-RS.)
•
PLC-5/11, PLC-5/15, PLC-5/20, PLC-5/25, PLC-5/30, PLC-5/40, or
PLC-5/60 and 1771-SN. (This category includes all smaller in-rack
processors and standalone scanners that have local and remote I/O and
begin rack addressing at rack 1.)
•
SLC-5/02 (or above) with 1747-SN scanner
After determining which category applies to your DCM application:
1. Find the column for the scanner used in your application.
2. Go down the column to the rack address that you assigned to the DCM.
3. Use the switch settings in the right-most columns of the table that
correspond to your rack address.