Campbell-scientific CS650 and CS655 Water Content Reflectometers Manual de usuario descargar pdf (Pagina 17)

CS650 and CS655 Water Content Reflectometers

SDI-12 communication has the advantage that up to ten probes may be given

different addresses and share a single control port. Another advantage is that

the datalogger programming is much simpler for SDI-12 communication than

RS-232.

The orange Rx wire is only used for RS-232 Tx/Rx

communication, and should be grounded when using SDI-12.

6.3.2 RS-232 Wiring

TABLE 6-2 shows the wiring code for communicating with a CS650 using

RS-232 serial protocol. Device Configuration Utility software uses RS-232 to

communicate with a CS650 through the A200 USB-to-Serial Module. See

Section 6.4, A200 and Device Configuration Utility, for details.

RS-232 communication is not recommended for use with Campbell Scientific

dataloggers because it requires two control ports per CS650 and the

programming is more complicated than for SDI-12 communication.

For RS-232 serial communication with devices other than Campbell Scientific

dataloggers, use the wiring information in TABLE 6-2. Factory default

communication settings are 9600 baud, no parity, 1 stop bit, 8 data bits, and no

error checking.

See TABLE 6-3 for a list of serial commands for the CS650.

TABLE 6-2. CS650 Wiring Code

for RS-232 and A200

Color Function A200 Terminal

Orange RxD Rx

Green TxD Tx

Red Power +12 Vdc

Black Reference G

Clear Shield G

6.4 A200 and Device Configuration Utility

The A200 Sensor-to-PC Interface allows communication between a CS650 and

a PC, allowing sensor settings to be changed through Device Configuration

Utility (DevConfig) software.

6.4.1 Using the A200

6.4.1.1 Driver Installation

If the A200 has not been previously plugged into your PC and your PC

operating system is not Windows 7, the A200 driver needs to be loaded onto

your PC.

NOTE

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Campbell-scientific CS650 and CS655 Water Content Reflectometers Manual de usuario Pagina 17