Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 57
Serial Communications Settings
NOTE
The default serial communications port settings of FS11P are: 9600
baud
, no parity, 8 data bits, and 1 stop bit.
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 30 on page 58. The
flow control lines RTS and CTS are not required but they can be used.
The hardware flow control can be enabled in FS11P with the 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 FS11P with the
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
the interface unit's enclosure; see Figure 29 on page 56.
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