Datasheet

INSYS ETHERNET 5.X Functions and their Configuration
Nov-06 45
If data is constantly received via the serial interface in sufficient speed, 1460 bytes are
packed every time and sent as one packet. 1460 bytes is the maximum permitted size of
an IP data packet.
If the data supply at the serial interface jams, after a configurable waiting time during
which no data via the serial interface arrives at the INSYS Ethernet 5.x, the packet is
packed and sent ahead of time. This waiting time (block forming time) is set with the
command ATS8=<n>.
RS232
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IP block formation when the maximal block size is reached
If, for example, in an application an RS232 cable is replaced by two INSYS Ethernet and a
network segment, the following will occur:
The data are sent in series to the INSYS Ethernet, where they are collected and then sent
to the second INSYS Ethernet as a packet. This second module will send the individual
data from the package again in series to the remote terminal of the application. Each
byte will therefore be transmitted twice in series and requires at least double the trans-
mission time as with a direct serial connection.
RS232
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RS232
For larger, constant data flows, this is qualified by the pipeline effect.
This means that while INSYS Ethernet#2 sends the last data block to the remote termi-
nal, INSYS Ethernet#1 will already be able to receive the next data block from the appli-
cation. During optimum network connections the entire transmission time is therefore
only insignificantly extended.