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7-2 TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual
–
May 2002 GFK-1541B
7
Diagnostic Tools Available for Troubleshooting
There are several tools to assist you in diagnosing problems with the Series 90 Ethernet Interface
and the network.
Use the
Ethernet Interface LEDs
to troubleshoot a problem on power-up of the Ethernet
Interface and for an immediate visual summary of the operational state of the Interface.
Use the
Series 90 PLC Fault Table
to troubleshoot a problem once the Interface is running.
It provides a record of exceptions logged by the PLC, the Ethernet Interface, and other Series
90 modules. The PLC Fault Table may be accessed through the PLC programming software.
Look in the PLC Fault Table for a logged fault, then refer to the PLC Fault Table section in
this chapter for instructions on what action to take.
Use the
Status Data
to troubleshoot ladder programs containing COMMREQ functions that
initiate communications. The status data consists primarily of the Status bits and the
Communications Status words.
For Ethernet Global Data operation, Exchange Status words can be used to troubleshoot
exchange operations. Refer to the chapter: “Ethernet Global Data” for more information.
Use the
Station Manager software
to troubleshoot a problem with the Ethernet Interface,
with the network, with PLC backplane communication, or with your application. The LOG,
TALLY, EXS, CHANNEL and STAT Station Manager commands are especially useful.
The LOG command provides a complete record of exceptions occurring with the
network and Interface.
The TALLY command provides statistics about operation and performance of the
network and Interface.
The EXS command provides information about COMMREQs.
The CHANNEL command displays detailed information about a specified SRTP
communication channel.
The STAT command provides the current status on the operation of the Interface.
Refer to GFK-1186,
TCP/IP Ethernet Communications for the Series 90 PLC Station
Manager Manual
, for information on how to access and use the Station Manager software.