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5
FUNCTION OVERVIEW
5.1
Function block diagram
Using function blocks, this section explains I/O data transfer to/from an inverter in CC-Link:
• Link refresh is continuously executed between the master station and inverter in the CC-Link system at intervals of 1.1 ms to
141 ms (per station).
(1) I/O signals
(2) Buffer memory
access
(1) These are I/O signals assigned to the CC-Link system master/local unit. These signals are used for communication
between the programmable controller CPU and CC-Link system master/local unit.
Refer to
page 55
for details of the signal.
(2) Regarding the data input to the inverter, writing of inverter output data, and reading of a faulty CC-Link station are
available. Automatic refresh function enables reading from/writing to buffer memory. (Use FROM/TO command of the
sequence program to synchronize without using the automatic refresh function.) Refer to CC-Link master/local module
manual for the buffer memory details.
(3) CC-Link communication start command is given from the sequence program. After the CC-Link communication starts, link
refresh is always performed asynchronously (or synchronously) with execution of sequence program.
For details, refer to the CC-Link system master/local unit manual.
Programmable controller Inverter
CC-Link system master/local unit
CPU
Buffer
memory
Inverter
FR-A8NC
(3) CC-Link
dedicated
cable
FUNCTION OVERVIEW
Input
Output
5
41
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