Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 176)

Message Formats
Appendix A
AĆ14
B. File symbol address plus word offset
DLE SRC C
0
S TNS MD
F
TS TNS STX FNC 00
02
ASCII sumbol
(8 characters max)
DLE ETX BCC
00 W/F
01
SET RESET
Mask Mask
C. Logical address
DLE SRC C
0
S TNS MD
F
TS TNS STX FNC
02
PLC-3 logical address
(2-51 bytes)
DLE ETX BCC SET RESET
Mask Mask
Reply Format:
This the same as the reply packet format for all bit writes
A. Format when successful execution
DLE SRC C
4F
S TNS
MD TS TNS STX DLE ETX BCC DST
B. Format when reporting an error
DLE SRC STX DST C
4F
S TNS
MD TS TNS DLE ETX BCC ETX
STS TNS
Where the extended status byte is optional