Campbell LoggerNet, Instruction Manual

Page: 467 / 580

Section 14. Troubleshooting Guide
14.5 Terminal Emulator to Test Communications
Terminal Emulator is a utility to test communications with the devices in the
datalogger network. Terminal Emulator is accessed from the Datalogger menu
of the Connect Screen. The operation of a ComPort and the connection to a
phone modem can be tested.
The Terminal Emulator utility is available from the Connect Screen to help
troubleshoot communications problems. When you choose a device with the
Select Device field, the Terminal Emulator will attempt to establish
communications with that device. The Terminal Emulator will use the lowest
baud rate among all of the devices involved in the link. For example if
choosing a COM port, the baud rate will typically be 115,200 baud and
LoggerNet simply opens the port. For a phone modem, the baud rate will be
set to the value in the Setup Screen for that phone modem, the COM port will
be opened and the DTR line will be asserted to enable the phone modem. For a
datalogger on a phone link, the baud rate will be set for the lower of the phone
modem or datalogger baud rates in the Setup Screen, and LoggerNet will try to
dial the phone modem and get a prompt from the datalogger. You can also use
terminal emulation to send commands to the dataloggers.
When the Terminal Emulator screen comes up as shown click the drop down
arrow to the right of the Select Device box to choose the device from the list of
devices in the network map. The correct baud rate for the link is automatically
set. The characters you type in the window are sent as ASCII text to the
selected device. The options that are available from this screen depend on the
device you select.
14-5