
2.OVERVIEW OF FL-net FUNCTIONS GENERAL B-64164EN/01
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2.2 FANUC FL-net FUNCTIONS
Cyclic data transmission
With the FANUC FL-net, part of large-capacity common memory can
be allocated in the PMC E area, R area, or D area to allow the user
program to read and write data in the FL-net common memory.
The FL-net common memory contains two areas: an 8K-bit (=
0.5K-word) area called area 1 and an 8K-word area called area 2.
Generally, common memory area 1 is used for treating bit data and
common memory area 2 is used for treating numeric data.
For how the PMC memory area corresponds to each common memory
area and how to allocate common memory areas, see Sections 2.1,
"Common Memory Area 1 Cyclic Transmission," and 2.2, "Common
Memory Area 2 Cyclic Transmission," in "II. Specification."
Message data transmission
The message data transmission function is the other FL-net function.
With this function, the user program also executes message data
transmission services via PMC memory areas.
To perform message data transmission, the user program writes the
transmission request code of message data transmission in the PMC
memory area that has been set as an message data transmission
interface in advance. The user program also reads received message
data via a PMC memory area. Part of message data transmission
server (request receiver) processing may be performed in the FL-net
board without user-program intervention.
FL-net
Common memory area 1
PMC memory PMC memory
Cyclic data
transmission
User
program
User
program
FL-net board
Common memory area 2
Common memory area 1
Common memory area 2
FL-net board