W&T Com-Server++, Manual

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67
W&T
The basis configuration of the Com-Server
Subject to error and alteration
8�4 Menu ���
r
TCP/IP Mode
r
System Options
n
Network Delay [10ms-Ticks]
Default: 0000)
This value specifies the minimum delay time of the Com-
Server after serial data have arrived. After this time has
expired, it packs the data into a network packet and sends
them to the respective communications partner. The de-
fault setting 0 means the attempt is made to send the data
as quickly as possible. The resulting high time transparen-
cy does however bring with it the drawback of a higher
number of network packets.
If the serial transmission takes place in predictable block
sizes, this value can be adjusted to optimize the network
load. There is also the advantage that the serial blocks are
transmitted within a network packets, so that they arrive
at the receiver bundled.
Example:
You are using serial data blocks of 25 bytes each and
transmission parameters of 9600 baud, 8 data bits, no pa-
rity and 1 stop bit. Each block thus has a length of approx.
26ms (1/9600 * 10 bits * 25 bytes). If the network delay is
set here to a value of 3 (=30ms), each block is sent to the
receiver with a network packet.
1 The situation described here applies only to a non
overloaded and error-free network. If there are inter-
ruptions in the data flow on the network side, any serially
accumulated data are also sent in larger network packets.
For secure closed transmission of serial datagrams in a
network packet we recommend the use of
Packet Options .
For details, see the section on Packetizing serial data-
grams .