EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
219
While in Poll/Standalone mode, changing to talk-freely mode also occurs when a ZA or
ZU message, sent by the SmartScanIS to the Harriman Dispatch Center, isn't
acknowledged after five transmissions. When message acknowledgements are
restored, Talker Mode reverts to the mode that was active before it was changed. If a
message non-acknowledgment is followed by five minutes of no valid polls, both the
acknowledgment failure and the five-minute timeout must be resolved before Talker
Mode reverts to the mode that was active before it was changed to talk-freely mode.
Milepost-0501.2, Track:Single
Equipment
---------------------------------------------------
A) Dragger...................... NO
B) Hot Wheel.................... NO
C) High Load.................... NO
D) Wide Load.................... NO
E) Carside Slope................ NO
F) Talker Mode......... Talk Freely
G) Snow Cycle................... NO
•
•
•
a
From the Equipment submenu, select
Talker Mode
.
The talker-mode setting toggles between Talk Freely and Talk On Defect. The
Talker Mode option
on the Equipment submenu changes. The Equipment
submenu reappears.
b
Return to step
3
.
10
To set or change the
snow-cycle
setting:
The Equipment submenu shows whether the snow-cycle feature is enabled (YES) or
disabled (NO). To avoid errant heat readings caused by moisture on the pyrometer
lenses, the scanners have heaters built into them. These heaters are made active, for
varying periods of time, depending on the ambient temperature.
The table below lists the heater activation times for both normal and snow-cycle
operation, grouped by ambient temperature.
Temperature Range
in degrees Fahrenheit
Out of every ten seconds,
the number of seconds scanner heaters are active
Low
High
Snow Cycle Off
Snow Cycle On
--
32
10 (Always On)
10 (Always On)
33
35
3
8
36
51
2
2
52
80
1
1
80
--
Off
Off
Summary of Contents for SmartScanIS
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