Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 - Manual (Page 33)

Configuring the Scanner through LIST
Chapter 2
2-7
To delete entries from the list, press:
entry / d [Return]
When forming this list, remember:
Selection of I/O rack numbers greater than 37
8
increases the program
scan time.
I/O rack numbers that are not assigned consecutively cause greater
memory requirements because memory has to be allocated for the
unused racks.
You can connect up to 32 I/O adapters to one I/O communication
channel on a scanner.
You can assign up to 16 different I/O rack numbers to one scanner.
For duplicate I/O addressing (complementary I/O or parallel output
configurations), you must have two chassis with the same assigned I/O
rack number and I/O group number on different I/O communication
channels of the same scanner.
Refer to the PLC-3 Family Controller Installation and Operation Manual
(publication 1775-6.7.1) for detailed information on complementary and
duplicate I/O configurations.
ATTENTION: Do not assign the same I/O rack number and
I/O group number to two chassis on the same I/O
communication channel. Failure to observe this warning could
result in equipment damage and/or unpredictable machine
operation with injury to personnel.
The controller uses assigned I/O rack numbers 77
8
, 177
8
, 277
8
, 377
8
for
internal communication. Do not assign these numbers to an I/O rack
(although you can use the associated addresses for internal storage).
For detailed information on 1/2-slot, 1-slot, and 2-slot I/O addressing
considerations, refer to the Remote I/O Adapter (Cat. No. 1771-ASB)
User’s Manual (publication 1771-6.5.83).