Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 209)

Detailed Flowcharts
Appendix D
DĆ5
Figure D.4
SENDM Subroutine
RETURN
SENDETX
Send
DLE ETX CRC
Link Data
Done
?
CRC
Include
Byte in CRC
SENDDATA
Send Link
Data Byte
Yes
No
SENDM
Reset CRC
Accumula-
tor
SENDCTL
Send DLE STX
11655
CRC
Include
ETX in CRC