Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 49
Serial Transmission with RS-232
For the RS-232 communication method, connect the signal wires to the
screw terminal at the CPU board FSC202. See Figure 26 on page 50. The
flow control lines RTS and CTS are not required but they can be used.
The hardware flow control can be enabled in FS11 with command SET
DATA_PORT RS-232 HW_FLOW_CNTR. During hardware flow
control, the control line RTS indicates 'Ready for Receiving'.
The hardware transmit control can be enabled in FS11 with command
SET DATA_PORT RS-232 HW_TRANSMIT_CNTR. During
hardware transmit control, the control line RTS indicates 'Request to
Send' and can be used for modem carrier control.
By default the RTS and CTS lines are not used.
NOTE
The cable shield of the RS
-232 cable must be properly grounded in the
cable gland of the interface
unit's enclosure, see Figure 25 on page 48.
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