Rockwell Automation 1779-KP5_KP5R ORD.1779-5.3 - Manual (Page 63)

1779ĆKP5 Troubleshooting Tools
Chapter 6
6Ć8
You can then use this information to format a Diagnostic Read command.
The reply from the Diagnostic Read command contains the data stored in
the counters.
For more information on the Diagnostic Status and Diagnostic Read
commands, refer to the Data Highway/Data Highway Plus Protocol and
Command Set Reference Manual (Publication 1770-6.5.16).
1779ĆKP5 Data Highway Plus Diagnostic Counters
The 1779-KP5 stores 28 Data Highway Plus counters in 35 bytes. These
counters can only be read from an intelligent device (computer) connected
to the same Data Highway Plus as the 1779-KP5. The following table
contains a list of 1779-KP5 Data Highway Plus diagnostic counter bytes
and what they contain (all two byte counters are read low byte first).
Counter Byte: Counts the Number of Times:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21, 22
23, 24
25, 26
27, 28
29, 30
31, 32
33
34
Received ACK with Bad CRC
Timeout Expired with No ACK Received
Transmit Retries Exhausted
NAK/Illegal Protocol Operation Received
NAK/Bad LSAP Received
NAK/No Memory Received
Received ACK/NAK Too Short
Received ACK/NAK Too Long
Something Other than an ACK or NAK Received
Token Pass Timeout
Token Pass Retries Exhausted
Claim Token Entered
Token Claimed
Bad CRC in Received Frame
NAK/Illegal Protocol Operation Sent
NAK/Bad LSAP Sent
NAK/No Memory Sent
Received Frame Too Short
Received Frame Too Long
Received a Retransmission of a Frame
Received Frame Aborted (Line Noise)
Message Successfully Sent
Message Successfully Received
Command Successfully Sent
Reply Successfully Received
Command Successfully Received
Reply Successfully Sent
Reply Could Not be Sent
Number of Active Nodes