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W&T The basis configuration of the Com-Server
n Flush Buffer
Default: active
If this switch is active, the serial buffer is cleared each
time a new connection is opened; any residual data which
cannot be transmitted (e.g. handshake stop of the serial
terminal device) are thus lost. But if you connect a termi-
nal device to the Com-Server which for example requires a
longer handshake stop for program reasons, you can pre-
vent clearing of the buffer by deactivating the switch. In
this way multiple connections can be opened one after the
other on the network side and the data are accumulated in
the buffer until they are sent.
n
Packet Options
Default: deactive
The Packet Options in this menu branch are criteria which
allow the Com-Server to detect the start and end of con-
tiguous datagrams in serial receiving. They allow a serial
datagram to be sent to the communication partner closed
in a network packet. In addition to start/end sequences
and fixed packet lengths, pauses can also be triggered in
the data stream.
For details, see the section on Packetizing serial data-
grams.
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