Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 279)

16–14 PCCC Host Commands
Publication 2755-833
0
5
00H
TNS
High Byte Low Byte
LSB
1
3 2
6
08H
Example (holds output closed for 10 milliseconds)
4
7
MSB
06H 60H
00H 0AH
Important: A duration of 0000 holds the specified output in the
programmed state until it is changed with another host command or
via the AUX terminal configuration screens. The condition field on
the AUX terminal will display Open or Closed.
The diagnostic commands (06H) allow you to obtain diagnostic data
on an DH485 communications link. The decoder supports these
diagnostic commands:
•
Diagnostic Loop (CMD= 06H, FNC= 00H)
•
Read Diagnostic Counters (CMD= 06H, FNC= 01H)
•
Read Diagnostic Status (CMD= 06H, FNC= 03H)
•
Reset Diagnostic Counters (CMD= 06H, FNC= 07H)
The command code for all diagnostic functions is 06H. A function
code (FNC) identifies each command and specifies which command
to perform.
Diagnostic Loop
The Diagnostic Loop Command (CMD= 08H, FNC= 00H) echoes
data back to the host. The reply returns the same data sent in the
Diagnostic Loop Data area of the command. The data area can
contain up to 122 bytes.
Diagnostic Link
Commands