Rockwell Automation 2755-DM9, -DM9E High Speed Decoder - Manual (Page 130)

Chapter 8
Host Commands Using the RS-485 Interface
8–18
C B
A A
Series A, Revision A decoder would return- 00000000
Series B, Revision C decoder would return- 00100010
The Bulletin Number/Name (Bytes 9 through 19) will be returned as an
ASCII encoded message “2755-DM9 [SPACE][SPACE][SPACE]”.
The Product Information (Bytes 20 through 27) are unused and returned as a
value of 00 (hex).
Diagnostic Loop Reply
Diagnostic Loop - Refer to the following illustration. The response to a
diagnostic loop command echoes any data contained in the diagnostic loop
data area of the command.
DIAGNOSTIC LOOP REPLY
00000000 01000110
TRANSACTION WORD
HI Byte LOW Byte
LOOP DATA
(SAME DATA AS COMMAND)
Reset Counters Reply
Reset Counters - After resetting the counters, the decoder returns the
following:
RESET COUNTERS REPLY
00000000 01000110
TRANSACTION WORD
HI Byte LOW Byte