Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 224)

13–9 PLC Addressing
Publication 1770Ć6.5.16 - October 1996
PLC-5 processors support logical and physical addressing:
For information on See page
logical addressing 13-10
physical addressing 13-16
floating point 13-17
Transmitting commands from PLC-5 processors
To transmit commands from a PLC-5 processor to your computer,
set up a computer buffer to simulate a PLC-5 file and write computer
application programs. The programs must be capable of interpreting
all the types of addressing formats that appear in the command
messages.
Important: PLC-5 processors can receive and transmit
PLC-2/1774-PLC type command messages with the
PLC-2/1774-PLC logical addressing format.
Before sending a PLC-2/1774-PLC command to a
PLC-5 node, you must first allocate a PLC-5 file with a
file number that is the decimal equivalent of the
PLC-2/1774-PLC’s octal node number. This file helps
the PLC-5 to simulate PLC-2/1774-PLC memory.
Data is read from or written to this file number.
PLCĆ5 Addressing
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