Campbell LoggerNet, Инструкция по эксплуатации, Страница: 455 / 580

Section 13. Implementing Advanced
Communications Links
This section describes the configuration and operation of a variety of communications
links. The communications links included here require special setup or configuration, or
require special consideration in the implementation to work properly.
Refer to Section 4, Setting up Datalogger Networks , if you need
general information on adding devices to the device map.
NOTE
13.1 Phone to RF
Phone to RF is used in situations where the RF network is far away from where
the LoggerNet server computer is located and phone access is available to the
RF base site. Before implementing this type of network, consideration needs to
be given to the collection intervals and the communication time required
between the computer and the RF base.
LoggerNet will make a call each time that it does data collection for a station.
It will stay on-line until a response is received — either the data, or an error
indicating that the data collection failed. LoggerNet will also initiate a call for
any datalogger operations such as connect in the Connect Screen or get table
definitions in the Setup Screen.
13.1.1 Setup
The device map set up in the Setup Screen for a Phone to RF link would look
similar to the communications network below.
To begin, add a Serial Port to the device map if one does not exist. Add a
Phone Modem to the Serial Port. To this Phone Modem, add a Remote Phone
Modem. Next, add an RF base modem and then an RF remote modem. To
complete the network, add your datalogger to the remote RF modem. Review
all of the settings for each device, and make any changes to customize the
settings for your network configuration.
13-1