English 7XV5655-0BA00
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Optimising Data Transfer
Great emphasis has been placed on compatibility in the design of this device. Due
to the Ethernet, there are, however, some minor restrictions. Data is not
transmitted in bytes to the network, but Ethernet blocks are formed. This might
result in minor delays. Block formation function does not directly affect the
application but might help to reduce the network load. Some fine tuning might be
necessary for time-critical applications as well. This involves the two timeout
parameters ("Total Read Timeout", "Character Distance").
Block Formation for Serial Data before Transmission into the Ethernet
After the first byte has been received, "Total Read Time" starts. After the time
expires, all characters received so far are relayed to the Ethernet. The default
value is 50 ms.
"Character Distance" is the maximum interval between two received characters. If
this is exceeded, all characters received so far are transmitted into the Ethernet.
The default value is 5 ms.
Total read timeout Total read timeout
Character timeout
Transmission
to PC
Transmission
to PC
Transmission
to PC
No transmission.
Gap is too small.
Transmission because
"Total Timeout" has
expired
Transmission because
the gap between the
characters is larger
than "Char Timeout"
Transmission because
the gap between the
characters is larger
than "Char Timeout"
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