Campbell Scientific CS451/CS456 Pressure Transducer - Manual (Page 45)

Appendix E. RS-232 Connection Via PC
Terminal Software
PC terminal software can be used to communicate with the CS451/CS456 via
the RS-232 communication mode (see FIGURE E-1).
The CS451/CS456 is connected to the PC via the A200 (see Section 8.1.1, PC
Connection Using the A200).
Upon setup, the terminal emulator software will request you enter the
Communication connection; defaults to a phone connection. Change the
communication to appropriate “Com” in the “Connect Using” box (see Section
8.1.1.4, Determining which COM Port the A200 has been Assigned, to
determine the COM port that was assigned to the A200). The software will
then prompt for the proper “Port Settings”. TABLE E-1 shows the RS-232
settings.
TABLE E-1. RS-232 Settings
Bits per Second 9600
Data bits 8
Parity None
Stop bits 1
Flow control None
You will now be able to communicate with the CS451/CS456. At the prompt,
push the key several times. This will wake-up the RS-232 mode of
the sensor. TABLE E-2 shows the RS-232 commands that can be entered once
it is in the RS-232 mode.
By default, the CS451/CS456 is in the SDI-12 mode for
communication. Once in the RS-232 mode, if there is no
communication for 20 s, the sensor will return to the SDI-12 mode.
NOTE
E-1