
3.MESSAGE TRANSMISSION SPECIFICATION B-64164EN/01
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3.2 OVERVIEW OF THE MESSAGE TRANSMISSION
FUNCTION
The function for transmitting messages other than transparent
messages involves a client function and server function. For a
message transmitted from the client, the server returns a response
message. In short, the client is a service requester, and the server is a
service receiver.
Basically, when the message transmission server function of the
FANUC FL-net function receives a request message, the server
function automatically returns a response message to the client
without involving the user program.
With the client function, the user program transmits a message by
using the interface area set by Pa50 (client function interface).
Client Server
User program
User program
System
System
FL-net
A transparent message can be handled freely by the user program
without making a client/server distinction. So, two interface areas
are required: one for transmission and the other for reception. As the
transmit interface area, the interface area set by Pa50 (client function
interface) used with a client message is used. As the receive
interface area, the interface area set by Pa52 (server function interface)
is used.
User program
User program
System
System
FL-net
Request message
Response message
Message
Message