Panasonic FP2 ET-LAN Technical Manual page 19

Transparent Communication Function
With the transparent communication function, transparent data transmission and reception between
computer and programmable controller and programmable controller and programmable controller is
possible.
Storage and extraction of the communication data at the programmable controller is carried out by
reading from and writing to the ET-LAN unit's shared memory communication buffer. The communication
requests are performed by switching on and off bits in the I/O or shared memory handshake areas.
Key Point:
With transparent communication, either the computer or programmable controller specifies the IP
-
address, and they open a mutual connection with the communication partner. After opening a
connection, communication processing on the programmable controller side is done by the ladder
program reading from and writing to the communication buffer of shared memory, and executing the
communication requests.
With the transparent communication function and the MEWTOCOL communications function (computer
-
link and data transfer), you can simultaneously use a maximum of eight connections with one ET-LAN
unit.
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