Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual User Manual
Page 135
Message Packet Formats
Chapter 5
5-56
Write Bytes Physical
Use this command to perform a Download Only after a Download (or
Upload) All Request has been successfully performed.
TNS
STS
CMD
0F
SRC
DST
FNC
18
1
2
1
The Physical Address is a 4-byte field
Up to 119 data words can be written with a single command (low byte of the word first).
2
TNS
STS
CMD
4F
SRC
DST
EXT
STS
Byte
Physical Address Bit(s)
1
2
3
4
A00 - A07
A08 - A15
A16 - A23
A24 - A31
that contains the address you are writing to:
Command Format:
Reply Format:
The STS and EXT STS bytes contain status and error code information.
For more information on these bytes, see the “Error Codes” section in this
document.
Word Range Read
This command is a read command whose starting address is either a
logical binary address or a logical ASCII address with up to 51 bytes of
specification. This starting address must point to a word or file.
A special case of this command is the single-word read, where the number
of bytes to read is two bytes.