CTI 2572-B / 2500C-2572-B Installation and Operation Manual 59
CHAPTER 10. TROUBLESHOOTING
This section provides information that you may find useful in diagnosing and correcting problems you may
encounter with using the 2572-B module.
10.1. Troubleshooting Aids
There are several troubleshooting aids that may be used to determine the cause of problems. They include:
LED Indicators
The module LEDs provide a visual indication of the status of the module components. See section 3.1. Front
Panel Features.
Event Log
The Event Log is a collection of entries, created by the module software, that document significant or unusual
module events. The log is maintained in non-volatile flash memory within the module, so that the records are
preserved when power is removed. Each log event includes a timestamp, a text description, and various
codes that may be useful to CTI support personnel. The most recent event is listed first and the least recent
event is listed last.
NOTE
The timestamp is based on the module time of day clock, which is set to the PLC time of day clock,
each time the module starts up. If the PLC clock is inaccurate, the event log timestamp will be also.
The Event Log is the one of the primary troubleshooting tools provided by the module. It is especially useful in
diagnosing problems during startup, program download, and other similar activities. When the TCP/IP
interface is operational, the event log may be accessed using a standard web browser.
Module Diagnostic Objects
The module maintains a set of diagnostic objects, which provide information about the various module
facilities. The information includes current operating status and counts of various module activities. The
diagnostic objects may be especially useful in diagnosing problems with network performance, PLC access,
and similar activities. The diagnostic objects are accessible using a standard web browser.
Network Analysis Software
Network analysis software captures Ethernet traffic on a network segment. A free network analysis tool,
Wireshark, is can be downloaded from https://www.wireshark.org/ . The tool captures network packets and
decodes the packet information, allowing you to observe the packet content. Since the packets include a
timestamp, you can determine the rate at which packets are arriving.
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