Section 5
Acu-Test Evaluation Kit
29
FT742-SM (RS422 & RS485) Sensors
– User Manual
Figure 18: Modifying Terminal Settings in TeraTerm
TeraTerm defaults to a baud rate of 9600 - it may be necessary to configure this via the Setup menu (Setup >
Serial Port).
With connection enabled with the settings configured as described above, send commands to the sensor to
confirm successful connection. Please note that in half-duplex communication protocols the sensor cannot receive
commands while simultaneously transmitting information, therefore it may be necessary to repeat the command
and confirm it was accepted using a QUERY command. This can be an issue when using CU mode at high
frequencies.
Below are some useful commands:
$01,ID?*//
Query the sensor ID setting
$01,CU?*//
Query the CU mode setting
$01,CUD*//
Disable CU mode
$01,CUE00010*//
Enable CU mode at 1 second intervals (1Hz). Note: Command is for FT742 sensors only.
Figure 19: Example of TeraTerm Command and Response from Sensor
The // line bypasses the checksum validation. Checksum validation is recommended for production datalogging
to improve data integrity. See Section 6 and Section 7 for further details regarding command structures and
replies.
Note: If a sensor is set to an ID setting other than 01, replace $01 with the alternative ID. Starting a command
with $// will perform the relevant command on all connected sensors.
