Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 112)

Message Packet Formats
Chapter 5
5-33
File Write
This is a write command, starting address of which is either a file symbol
or a block address. This starting address must point to a file of words.
Command Packet:
TNS DST SRC CMD FNC
0F 03
PACKET
OFFSET TOTAL
TRANS PLC-3 LOGICAL ADDRESS
(2-51 Bytes) DATA — Max. length is 239 bytes minus the length of the PLC-3 logical address. STS
(Must be an even number of bytes.)
TNS STS CMD
4F
SRC DST
TNS STS CMD
4F
SRC DST EXT
STS
Reply Format: (EXT STS Byte Is Optional)
B. Format When Reporting an Error
A. Format When Successful Execution
Physical Read
This is a read command where the starting address is a PLC-3 physical
address. It is used to upload from a PLC-3 to a computer. The destination
1775-KA module will accept this command only after the source station
has successfully transmitted a shutdown request.
Reply Format: (EXT STS Byte Optional)
B. Format When Reporting an Error
TNS STS CMD
4F
SRC DST
TNS STS CMD
4F
SRC DST EXT
STS
A. Format When Successful Execution
Command Format:
TNS STS CMD
0F
SRC DST FNC
09
DATA — Max. of 244 Bytes
or 122 Words
SIZE PLC-3
Physical Address