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Ethernet/ RS232C Ports
FP Web-Server V2.11
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8.1 Generalities on the Ethernet/ RS232C Ports
The FP Web-Server can work as an Ethernet to a RS232C interface converter. Thereby all data
the FP Web-Server receives via an Ethernet port (e.g. from a computer) are routed to its
RS232C port and vice versa (i.e. all data received at the RS232C interface are sent back to the
computer via the Ethernet). In this configuration the FP Web-Server is the server and the
computer is the client.
To setup an FP Web-Server port as a client, refer to the online help under Enable Transparent
TCP/IP Client Port. With two FP Web-Server units that are setup as a pair of transparent port
server and client, two FP-Sigma can communicate with each other via PLC link function (PC link
protocol) (take into account the timeout set in the PLC).
For a detailed description refer to the online help under the keyword "Configurator parameters
to the MEWTOCOL port server" or "configurator parameters for the transparent port".
8.1.1 Server's Side
For this kind of data exchange, the FP Web-Server provides two special Ethernet (i.e. TCP/ IP)
server ports that wait for an incoming connection from a client (e.g. a computer or an FP
Web-Server configured as a port client):
a) MEWTOCOL Communication with the PLC
• 3-pin RS232C connection is connected with the PLC
• preset TCP/ IP port number 9094 (Server)
• up to three client connections are possible (TCP/ IP)
• MEWTOCOL protocol for data and program exchange
b) Transparent Communication
• 9-pin RS232C connection is connected with any unit (also PLC, GK panel...)
• preset TCP/ IP port number 9095 (Server or Client)
• only one client possible (TCP/ IP or UDP/ IP)
• arbitrary protocols (also MEWTOCOL) possible
Comments:
• If the PPP-Server or Internet email of the FP Web-Server is active and a modem is
connected to the 9-pin RS232C, transparent communication is not possible because
the 9-pin RS232C connector is busy.
• The current FP Web-Server firmware implementation supports up to 3 clients, i.e. up to
three computers can communicate with a PLC! However, be aware that only one client
is allowed to use the MEWTOCOL monitor commands! Standard MEWTOCOL
commands and MEWTOCOL program download commands can be used by all three
clients at the same time.
This means that only one client is allowed to use FPWIN or PCWAY for data monitoring,
but up to three GK panels can access the FP Web-Server at the same time because the