Rockwell Automation 1771-KA2 Communication Adapter Module - Manual (Page 47)

Commands
Chapter 4
4-11
The PLC/PLC-2 station can use either protected or unprotected
commands to access its assigned PLC-3 file. Note, however, that the
PLC/PLC-2 station cannot access its assigned file until you create and
allocate that file. To create a PLC-3 file, use the CREATE command
described in the PLC-3 Programming Manual (publication 1775-6.4.1).
Programmable controllers can send the following non-privileged
commands to a 1773-KA interface module:
unprotected read
unprotected write
unprotected bit write
protected write
protected bit write
A 1773-KA module accepts non-privileged commands like other Data
Highway interface modules with one exception: the 1773-KA module
does not have memory protection rungs. Instead, you set switches that
allow or disallow the module to receive protected and unprotected
commands.
The PLC-4 Microtrol controller uses a four-digit address for its input,
output, flags, store, timer and counter bits. (Timer and Counter status bits
require an additional two digits.) When you issue a command from
another programmable controller or computer, do not enter these
addresses; instead, enter an address code. It is important that you
understand these addresses, however, to see how they relate to address
codes.
Accessible Data Table Locations
- PLC-4 Microtrol Processors