Mitsubishi Electric FX3G SERIES Programming Manual page 705

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

Program example

In the example shown below, data is read from and written to the buffer memories (BFM) in the unit No. 2 as follows:

• When X000 is set to ON, data stored in D100 to D179 (80 points) are written to the buffer memories (BFM) #1001

to 1080 in the special function block/unit whose unit number is No. 2 by 16 points in each operation cycle.

• When X001 is set to ON, the buffer memories (BFM) #2001 to 2080 (80 points) in the special function block/unit

whose unit number is No. 2 are written to D200 to D279 by 16 points in each operation cycle.

Instruction execution complete

Instruction non-execution

Instruction execution

abnormally complete

Instruction execution complete

Instruction non-execution

Instruction execution

abnormally complete

31 Data Transfer 3 – FNC276 to FNC279

31.1 FNC278 – RBFM / Divided BFM Read

The BFM write start flag is set

D100 to D179 (80 points) are written to

the buffer memories #1001 to 1080 in

the unit No. 2 (in 5 operation cycles).

The BFM write start flag is set to OFF.

Execution of the WBFM instruction is

The BFM write start flag is set to OFF.

The BFM read start flag is set to ON.

The buffer memories #2001 to 2080 (80

points) in the unit No. 2 are read to

D200 to D279 (in 5 operation cycles).

The BFM read start flag is set to OFF.

Execution of the RBFM instruction is

The BFM read start flag is set to OFF.

Fx3u series Fx3uc series