STC SmartScanIS, User Manual

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EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
193
COM2 is dedicated to Union Pacific's Polling System. If your site communicates with the
Harriman Dispatch Center over the RFL network, you can't disconnect that link without first
obtaining permission from the Harriman Dispatch Center. If your site uses a modem to
communicate with the Harriman Dispatch Center, COM3 is unused and available for your
laptop.
COM3 is the only port that displays anything as the system boots up. Consequently, you must
use it if you want to see what's happening following a power-up or reset. Because COM1 and
COM2 already have functions allocated to them,
STC recommends COM3 as the only serial
port for use with the serial interface .
11.2 Main Menu
To display the Main menu:
1 If on-site :
a If COM3 has nothing plugged in it, plug your computer into it.
b If COM3 has something plugged into it, unplug what is connected to COM3 and
plug your computer into it.
2 If off-site , plug your computer into a modem that is plugged into a nonswitched analog
telephone line.
3 Turn on your computer.
4 Be sure that your computer has installed communications software, that it is set to use
full duplex, and that the baud rate is set correctly.
If on-site , the baud rate of your computer must match the baud rate of the selected
serial port because they are in direct, one-to-one, communication with one another.
For example, the baud rate for COM3 was set to 9600 at the factory. If the customer
changed this baud rate, your computer must be set to the changed value.
For off-site connections, the baud rate of your computer doesn't have to match the
baud rate of the selected serial port because the telephone network between the two
modems breaks this direct physical connection. In an
off-site setup, your computer
and its modem have a direct connection, the two modems have a direct connection,
and the detector and its modem have a direct connection. Each of these individual
direct connections must have matching baud rates. However, the different connection
"types" (user computer to modem, modem to modem, detector to modem) don't have
to share a common baud rate (although it's simpler if they do).
Use your communications software to open a LOG file and capture the whole session
to the file. When your session is complete, you may then view what you have done
with an editor, print it with a printer, or store it for later retrieval.
5 On your computer, open a LOG file.