REALTIME CONTROL
RV229 Anemometer Adapter

Application Examples

	Serial connection to a PC The RV229 can be plugged directly into an RS232 serial port, or into a serial-USB adapter. The serial port powers both the RV229 and the connected transducer. HyperTerminal can display the wind speed and direction, and log the csv formatted wind data to a file for analysis using a spreadsheet. Web server software can use the wind data in dynamic web pages.
	Analog connection to a PLC Some PLC and DCS I/Os do not detect the 3.3 volt pulses from the RV229, so analog connection must be used. The PLC analog inputs and 24 VDC system power are connected to the RV229 using a user-supplied standard DE9 plug. 100 uF capacitors are required across each analog input, either at the PLC terminals or within the DE9 plug. On powerup the RV229 detects any capacitors and switches its output mode to analog on that or those channels.
	Pulse frequency connection to a Data Logger Digital I/O on a data logger may be less expensive and use less power than analog I/O, so may be preferred. The data logger and suitable power supply are connected to the RV229 using a user-supplied standard DE9 plug.
	Standalone wind power site data collection To log wind speed and direction distributions for wind power site analysis you need only a Rotavecta transducer, an RV229 and a battery. A regular 6 volt alkaline lantern battery will run an RV229 in logging mode along with a transducer for a year. To download the logged distributions simply disconnect the RV229 from the transducer and the battery, plug it into your PC's serial port and use Hyperterminal (which comes with Windows), Minicom (for Linux)  or a similar general purpose terminal program. The downloaded file is in csv format suitable for opening with a spreadsheet program such as Microsoft Excel or OpenOffice Calc. From these distributions and a turbine's power curve the power which would have been delivered by that turbine in that wind regime can be calculated, and the effect of any wind shadowing can be quantified.