87
W&T Packetizing serial datagrams
Subject to error and alteration
10�1�4 Fixed Packet Length
The Com-Server structures datagrams based on a fix number
of characters. This means datagrams are not passed to the
network until the set number of characters has been received.
n
Activate this Packet Option (Telnet)
Activates the selected option for serial data reception.
n
Fixed Packet Length
Enter the desired number of characters.
1
The value set under Fixed Packet Length is limited to
the size of the MTU. The factory default setting for this
is 560 bytes. In the menu path Setup System r Setup TCP/IP
r MTU this can be extended to 1024 bytes.
Example
A serial device always replies to the polling from a master
with a fixed datagram length of 30 bytes.
For correct packeting of this protocol the following settings
must be made on the Com-Server:
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