W&T Com-Server++, Manual

Page: 74 / 228

74
W&T
Configuration of the serial port
RS232 terminal device, the Com-Server stops serial
data output until it receives an XON. If
XON/XOFF Send
is turned on, the Com-Server generates an XOFF when
it is no longer able to receive serial data.
n
XON/XOFF (Filter)
If XON/XOFF is turned off for flow control, this option
can be used to separately determine for both data di-
rections whether the Com-Server filters these control
characters out of the actual data.
1� Send-Filter (Data direction network
r
serial)
If this option is turned on and XON or XOFF characters
occur in the actuqal data, the Com-Server filters them
out and does not pass them along to the terminal
device. Select this mode generally for bi-directional
RS232 connections, since otherwise you will have
problems with data traffic. If the Send-Filter option
is turnd off, all the data including the XON and XOFF
characters are sent unfiltered on the RS232 interface.
This mode only makes sense if the connected terminal
device is a graphics printer whose data stream can be
expected to contain handshake characters.
2� Receive-Filter (Data direction serial
r
network)
If this option is turned on, the Com-Server interprets
the XON and XOFF characters sent by the serial termi-
nal device as control bytes and does not insert them
into the network data stream. This ensures that the re-
cipient in the network only gets actual user data. If Re-
ceive-Filter is turned off, the XON and XOFF characters
sent by the serial terminal device are transmitted to the
network together with the actual user data. This mode
requires of the respective recipient in the network that
it be able to separate actual data from control data.
The currently selected parameters are shown in the top line of
the
UART Setup menu: