Campbell-scientific LoggerNet Datalogger Support Software Manual de usuario descargar pdf (Pagina 469)

Section 14. Troubleshooting Guide

assume you have a Hayes-compatible modem and an array-based datalogger on

a phone link with the phone number “752-7779”. You could test the link with

the following sequence:

Type

ATH <Enter>

To hang up the modem. You should see an “OK” on the

screen sent by the modem. If you do not, perhaps there is

no modem attached to that COM port or perhaps the

modem is not powered on.

Type

AT&F

<Enter>

To put a typical Hayes-style modem back to the factory

defaults. You should see an “OK” echoed by the modem.

If you do not, perhaps it’s not a Hayes-compatible modem.

For example, many U.S. Robotics modems require

“AT&F1”. Older 1200 baud modems may require “ATZ”.

Type

AT&C1&D2

<Enter>

To cause the modem to use hardware flow control and

report the loss of the carrier when the datalogger hangs up

its modem. You should see “OK” appear on the screen. If

you see “ERROR”, then the modem doesn’t recognize one

or both of the “&C1” or “&D2” commands.

Type

AT\J1 <Enter>

To force the modem to follow the serial port rate rather than

try to connect at the fastest rate the remote modem will

support. You should see “OK” appear on the screen. If you

see “ERROR”, then the modem doesn’t recognize this

command.

Type

ATDT752777

9 <Enter>

To dial, using tone dialing, a datalogger at “7527779”. You

should hear a dial tone, followed by a series of beeps and

tones, followed by what sounds like white noise or

scratching sounds and screeches. When the modems

connect, you should see the word, “CONNECT”, appear on

the screen, perhaps followed by information about the

speed and type of connection. If you don’t hear a dial tone,

perhaps you haven’t plugged in the telephone line or the

line is not operational. If you hear the dial tone and the

beeps of the phone number being dialed, but there’s no ring

on the other end, perhaps the number isn’t valid or you

didn’t “get an outside line”. If a person answers, perhaps

you have the wrong phone number. If it rings, and answers

with tones and screeches, but you don’t get a “CONNECT”

message, perhaps you have dialed a fax number, or other

data modem, but not one with a datalogger attached or the

datalogger is the wrong type.

Type

<Enter>

about 2–3

seconds apart

To send carriage return characters to the array-based

datalogger. If the datalogger recognizes these characters, it

will send back an asterisk, “ * “ for every <Enter>

keystroke. If it does not, perhaps it’s not an array-based

datalogger, or you’ve chosen a baud rate that’s too high for

the datalogger or the quality of the phone line is too poor to

support that baud rate.

Type

A <Enter>

You should see a string of characters from the datalogger

that report its status, including final storage pointers,

memory size, perhaps lithium battery voltage, and internal

error counters. If you do not, then the phone line may be

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