262 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix F MicroLogix 1400 Distributed Network Protocol
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.
Table 31 - 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
4CS0:4 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
5CS0:5 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
7CS0:7 CS2:7 Length
8 CS0:8 CS2:8 Format Code
9CS0:9 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
17 CS0:17 CS2:17
Link Layer Error Codes
0: ERR_NO_ERROR
1: ERR_NO_RX_BUFFER
2: ERR_TOO_SHORT
3: ERR_TOO_LONG
4: ERR_UART_ERROR
5: ERR_BAD_CRC
6: ERR_CTS_TIMEOUT
7: ERR_CTS_DROP_MID_PKT
8: ERR_UNKNOWN_CHAR
18 CS0:18 CS2:18 Reserved – Always 0
19 CS0:19 CS2:19 Reserved – Always 0
20 CS0:20 CS2:20 Reserved – Always 0
21 CS0:21 CS2:21 Reserved – Always 0
22 CS0:22 CS2:22 Reserved – Always 0
23 CS0:23 CS2:23 Data Link Layer Active Node Table
24 CS0:24 CS2:24 Length
25 CS0:25 CS2:25 Format Code
26 CS0:26 CS2:26 Number of Nodes
27 CS0:27 CS2:27 Reserved – Always 0
28 CS0:28 CS2:28 Reserved – Always 0
29 CS0:29 CS2:29 Reserved – Always 0
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