User Manual
Chapter 13
GFK-1503F
Jan 2020
Ethernet Communications
236
13.5
Diagnostic Tools
There are several tools to assist you in diagnosing problems that may occur with Ethernet
operations and Ethernet Global Data.
•
Check the Ethernet LEDs, as detailed in the following sections, to troubleshoot a
problem on power-up of the Ethernet Interface. The LEDs provide an immediate visual
summary of the operating state of the Interface.
•
Use the PLC Fault Table, also explained in this chapter. The PLC Fault Table records
exceptions logged by the PLC, the Ethernet interface, and other modules. The PLC Fault
Table is accessed through the PLC programming software.
•
The application program can use special status data to monitor Ethernet operations.
—
The Ethernet interface status address, selected during PLC configuration,
contains information about the operating status of the Ethernet interface.
—
The Exchange Status words, selected during Ethernet Global Data
configuration, contain information about the status of exchange operations.
•
• Use the
Station Manager function to troubleshoot a problem with the Ethernet
Interface, with the network, with PLC backplane communication, or with your
application. The LOG, TALLY, and STAT Station Manager commands are especially
useful. Refer to the VersaMax PLC Ethernet Station Manager Manual(GFK
–
1876) for
information on how to access and use the Station Manager.
13.5.1
What to do if you Cannot Solve the Problem
If you still cannot solve your problem, call Emerson
–
NA, 1- 800-433
–
2682.
Please have the following information available when you call.
•
The Name and Catalog Number marked on the product.
•
Description of symptoms of problem. Depending on the problem, you may also be
asked for the following information:
—
The ladder logic application program and the PLC sweep length at the time the
problem occurred.
—
A listing of the configuration parameters for the Ethernet Interface that failed.
—
A description of the network configuration. This should include the number of
PLCs and host computers accessing the network, the type of network cable
used (e.g. twisted pair, fiber optic, etc.), length of network cable, and the
number and manufacturer of transceivers, hubs, and network switches used.
13.5.2
Checking the Ethernet LEDs
After configuring the Interface, follow the steps below to verify that the Ethernet Interface
is operating correctly.
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