Function Overview; Function Block Diagram - Mitsubishi Electric FR-A7NC E kit-SC Instruction Manual

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 1.1ms to 141ms (per station).
1) I/O signals
2) Buffer memory
access
1) These are I/O signals assigned to the CC-Link system master/local module. These signals are used for
communication between the programmable controller CPU and CC-Link system master/local module.
Refer to page 51 for details of the signal.
2) Reading of 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 system 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 module manual.
Programmable controller
CC-Link system master/local module
CPU
Buffer
memory
Inverter
FR-A7NC
3) CC-Link
dedicated
cable
Input
Output
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