W&T Com-Server++, Manual

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W&T
Packetizing serial datagrams
10�1 Packet Options
Packet Options in the menu path Setup Port x
r
TCP/IP Mode
r
SystemOptions are criteria which allow the Com-Server to
detect the start and end of contiguous datagrams in serial
receiving. They allow a serial datagram to be sent to the
communication partner closed in a network packet. Such data-
gram-optimized transmission is often necessary in tunneling
and transmission of serial protocols which require synchro-
nous reception of the data packets with a defined character
delay time.
For serial protocols which emphasize the greatest possible
latency-free transmission and shortest possible acknow-
ledgement delay time, Packet Options should not be used.
By factory default the Com-Server operates latency-optimized
and sends received data as soon as possible to the respective
communication partner.
1 Regardless of how Packet Options is configured, the
Com-Server sends all received data to the network-side
communication partner as soon as the set MTU is reached.
The factory default setting for this is 560 bytes. In the menu
path
Setup System
r
Setup TCP/IP
r
MTU this can be in-
creased to max. 1024 bytes.
The set Packet Options apply to the following Com-Server
modes.
• TCP client
• TCP server
• UDP peer
• COM redirector
• Box-to-Box
• OPC server