La Crosse Technology WS-2510, Operating Instructions Manual

Page: 65 / 75

65
Activation of data transfer
In its normal mode, the PC radio interface is inactive and does not react to V24
signals.
•
For the interface to be supplied with power, DTR must be set (+12 V) and
RTS deleted (-12 V).
• For activation, the activation command should be sent to the interface until
a response is received from it.
• The PC radio interface activates its interface as soon as a sign appears.
However, it takes up to approx. 30 ms until the oscillator is running smoothly
and commands can be properly received.
• Once the interface has responded to the activation command, the data
transfer can begin.
• The data exchange via the V24 interface has priority over reception from the
sensors. Thus the reception of data should take place over longer intervals.
• Data records are therefore also only deleted after a special request from the
PC. By comparing the transferred block numbers in the data record, the PC
can determine whether the next data record has actually been selected.
• If no data traffic takes place over a period of 71 ms, the PC radio interface
will again be deactivated.