Rockwell Automation 1771-KA2 Communication Adapter Module - Manual (Page 50)

Commands
Chapter 4
4-14
address code 010
addresses the first controller - controller 1 - while
address code 011
addresses the second controller - controller 2.
A PLC-4 Microtrol uses a decimal addressing scheme (Table 4.A). The
PLC-2 family of programmable controllers use an octal addressing
scheme. Thus, you must convert the PLC-4 Microtrol’s decimal addresses
to octal.
Address codes are divided into four sets:
1. store words
2. input, output, and flag words
3. input, output and flag area
4. timer/counter words
When using these address codes, observe these restrictions:
1. Do not address more than one set at a time. For example, if you want
to read both the store and the input words of controller 1, send one
command to read the store area, and a second command to read the
input words.
2. Do not address more than one controller at a time. For example, if
you want to read the store area of both controller 1 and controller 2,
send two separate read commands.
3. Do not send a command to a controller that is in program mode. A
controller in program mode is not an active member of the loop,
because its data table is not being updated.