
In extremely demanding cases, we recommend that you take into account the
bandwidth limitations.
The total sustained data bandwidth that each device can handle for all ports
simultaneously is as follows:
FC-21ETH—150kbps
FC-22ETH—140kbps
FC-24ETH—180kbps
9.2 Example Bandwidth Calculation
The FC-22ETH has two serial ports. Each serial port can support up to:
140kbps / 2 = 70kbps
If each of your protocol commands is 100 bytes, (that is, 800bits), you can safely
send and/or receive a minimum of 85 of these commands per second on each
serial port ((140kbps * 1024) / 800bits / 2 = 89.2). The same calculation applies to
all devices. A similar calculation applies when fewer ports are used at the same
time; in this case higher bandwidth per port can be achieved.
In critical applications requiring a lossless data transfer, we recommend that
communication on all the other ports is stopped when making a long file transfer
(for example, when performing a firmware upgrade via one of the serial ports).
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