320 Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Appendix F MicroLogix 1400 Distributed Network Protocol (DNP3)
the controller is in a fault mode, it sends the command with the function code
FC_INITIALIZE_APPL (16) before sending the command with the function
code FC_STOP_APPL (18).
Diagnostics
Errors in a DNP3 Slave subsystem are logged in the Communication Status File.
There are 71 words for the troubleshooting.
This section shows the 71 words of the communication status file for each
Channel 0 or Channel 2 port.
Communication Status File Words
Words Offset File/Element
Description for
Channel 0
File/Element
Description for
Channel 2
Description
0 CS0:0 CS2:0 General Status Category Block ID
1 CS0:1 CS2:1 Length - 8 bytes (4 words including format code)
2 CS0:2 CS2:2 Format Code - Always 0
3 CS0:3 CS2:3 Communications Configuration Error Code
4 CS0:4 CS2:4 bit 15: Reserved - Always 0
bit 14: Modem Lost Bit
bits 5…13: Reserved - Always 0
bit 4: Communications Active Bit
bit 3: Selection Status Bit
bit 2: Outgoing Message Command Pending
bit 1: Incoming Message Reply Pending
bit 0: Incoming Command Pending
5 CS0:5 CS2:5 bits 8…15: Baud Rate that the selected link layer driver is operating at out
communication channel.
bits 0…7: Node Address
6 CS0:6 CS2:6 Diagnostic Counters Category Identifier
7 CS0:7 CS2:7 Length
8 CS0:8 CS2:8 Format Code
9 CS0:9 CS2:9 bits 4…15: Reserved modem control line states - Always 0
bit 3: Data Carrier Detect
bit 2: Reserved modem control line state - Always 0
bit 1: Request To Send
bit 0: Clear To Send
10 CS0:10 CS2:10 Total Packets Sent
11 CS0:11 CS2:11 Total Packets Received for this node
12 CS0:12 CS2:12 Total Packets Observed
13 CS0:13 CS2:13 Undelivered Message Packets
14 CS0:14 CS2:14 Message Packets Retried
15 CS0:15 CS2:15 NAK Packets Received
16 CS0:16 CS2:16 Link Layer Error Count
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