Chapter 4: Reports
176 Vigilant VS1 and VS2 Technical Reference Manual
Diagnostics reports
There are two Diagnostics reports designed to show the communication
performance of the devices on a loop.
Comm Retries report
This report lets you display a list of devices that have required two, three, or four
consecutive communication poll retries. It lists the devices that could potentially
generate a communication fault by showing the maximum number of retries for the
current hour and a summary of the past 24 hours.
The report can be used to identify devices with intermittent communication faults. A
device appearing in this report is an indication that the wiring to the device is
suspect. To investigate problem devices, inspect the wiring between the problem
device and another device not in the report. Inspect this section of wiring for
problems such as loose connections and intermittent wiring breaks.
Note: The current hour retries can be cleared and updated by running the Loop
Comm Check diagnostic. (See “Loop comm check” on page 183 for more information).
Response Quality report
This report lists the devices that are communicating at or below a quality percentage
that you specify. By entering different percentages, you can troubleshoot device
communications on a loop.
The panel periodically stores the measurement of the response for individual devices
during communication polling. The report displays the result of the latest poll as a
percentage, where 100% is the best response (maximum possible pulse strength) and
anything less than 44% means that the device failed a communication poll and could
potentially generate a communication fault.
Devices appearing in this report are an indication that the wiring to the devices is
questionable or that the devices themselves are questionable. To investigate problem
devices, inspect the wiring between the problem device and another device not in the
report. Inspect the wiring for problems such as exceeding wiring specifications (see
“Device loop wiring” on page 11 for more information), loose connections, and
intermittent wiring breaks and shorts.
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