EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
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Appendix A
System Alarms
This appendix describes the conditions and events that the SmartScanIS flags as System
Alarms. These alarms provide data about passing trains and system status. These alarms
are listed in the System Alarms section of the Train Detail and Exception Detail reports.
Chapter 12 - Producing Reports
tells how to produce these reports.
Regardless of the train's condition, the System Alarms header appears on the report, followed
by at least one text message, which can be either:
"System Integrity Check Passed!" only
One or more System Alarm descriptions followed by "System Integrity Check Passed!"
"Integrity Failure" followed by one or more Integrity Failure descriptions
One or more System Alarm descriptions, followed by "Integrity Failure," followed by
one or more Integrity Failure descriptions
A.1 AC Power Is Off! Alarm
The AC Power Is Off! alarm indicates that AC power wasn't on when it was checked during the
end-of-train processing. This alarm doesn't say anything about any lack of power during train
passage.
A.2 Advance Turn-On Failure Alarm
All tracks use two gating transducers. Some tracks also use two advance transducers or a
track circuit. If the advance transducers or the track circuit fail to activate the system, the first
hit on a gating transducer automatically activates it.
The Advance Turn-On Failure alarm indicates that this has happened and that the arrival
speed of the train was at least 10 mph (16 kph).
A.3 Basetime Error Reader 1 Alarm
The Basetime Error Reader 1 alarm indicates that a timestamp message was received from
the 2200-750 Reader, but that the message was corrupt. This could mean that
communications between the Processor board and the reader were temporarily out of synch.
If the problem is flagged on many trains, it most likely indicates that the serial communications
channel between the reader and the Processor board is breaking down.
Summary of Contents for SmartScanIS
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