Rockwell Automation 2705 REDIPANEL KEYPAD MODULE USER MANUAL - Manual (Page 24)

with PLC Controllers
Chapter 4
Configuring the Bulletin 2705 Keypad Module
4–7
The 2705 Keypad Module can be configured for any of four rack sizes: 1 /
4
,
1 /
2
, 3 /
4
, and a full rack. Rack sizes relate to the amount of I/O accessible to
each rack: 32 I/O bits or points for 1 /
4
rack, 64 for 1 /
2
rack, 96 for 3 /
4
rack
and 128 for a full rack. You set DIP switches for the rack size you want in
your system design. See Chapter 5 on DIP switch settings.
IMPORTANT NOTE: For stored messages, you must configure for 1 /
2
rack or larger. You cannot use stored messages with 1 /
4
rack.
Note: Stored message display requires 3 /
4
rack to use the BCD mode. BCD
mode can only be configured for 1 /
4
or 1 /
2
rack if message storage is
disabled.
Table 4.D shows the functional characteristics of the Keypad Module
configured in the available rack sizes:
Table 4.D
2705 Keypad Module Functions by Rack Size
Stored Message
BCD Mode
Binary or
Integer Mode
(8 Digits)
N mber of
Rack Size
Stored Message
Capability
Number of BCD
Digits
Number of
ASCII
Characters from
PLC
Number of
ASCII
Characters from
PLC
Number of
Destination Bits
1 /
4
Rack No 6 0 0 0
1 /
2
Rack
BCD=N
Other=Yes
8 2 4 16
3 /
4
Rack Yes 8 8 8
BCD=32
Others=48
Full Rack Yes 8 10 12
BCD=64
Others=80
Calculating Rack Size