Publication 1766-RM001A-EN-P - October 2008
Function Files 63
Communications Status
File
The Communications Status (CS) File is a read-only file that contains
information on how the controller communication parameters are
configured and status information on communications activity.
The communications status file uses:
There are three Communications Status Files for each communications
port. Communications Status File CS0 and CS2 correspond to Channel 0
and Channel 2 on the controller. Ethernet Communications Status File ES
corresponds to Channel 1 on the controller.
The data file is structured as shown below:
The following tables show the details of each block in the
Communications Status File.
Communications Status File Size
Controller Number of Word Elements
MicroLogix 1400 71 1-word elements
TIP
You can use the Communications Status File information as a
troubleshooting tool for communications issues.
Communications Status File
Word Description Applies to Controller
Details
on Page
0…5 General Channel Status Block MicroLogix 1400 64
6…22 DLL Diagnostic Counters Block MicroLogix 1400 66
23…42 DLL Active Node Table Block MicroLogix 1400 78
words 43…70 when using DF1 Full-Duplex, DF1 Half-Duplex, DH-485, or ASCII:
43 End of List Category Identifier Code
(always 0)
MicroLogix 1400 --
43…70 Reserved •MicroLogix 1400 --
words 43…70 when using Modbus RTU Slave, Master or DF1 Half-Duplex Master:
43…69 Modbus Slave Diagnostic Counters
Block
•MicroLogix 1400 71
70 End of List Category Identifier Code
(always 0)
•MicroLogix 1400 --
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