Mitsubishi Electric FX3U-1PG - FROM;TO Instructions

7 Buffer Memory
7.1 How to Read/Write from/to Buffer Memory
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FX3U-1PG User's Manual
1
Introduction
2
Specification
3
System Configuration
4
Installation
5
Wiring
6
Before Starting Positioning Operation
7
Buffer Memory
8
Manual Control
9
Positioning Control
10
Program Example
7.1.2 FROM/TO instructions
1. FROM instruction (Reading out BFM data to PLC)
Use the FROM instruction to read the data from the buffer memory.
If the following program is created, 1 point of data will be read out from the buffer memory BFM#30 of unit No. 1
to data register D10.
2. TO instruction (Writing PLC data into BFM)
Use the TO instruction to write data to the buffer memory.
If the following program is created, 1 point of data (K4000) will be written to buffer memory BFM#0 of unit No. 1.
Read command
Transfer destination
Number of transfer points
Unit No.
Buffer memory No.
K1 K30 D10 K1
FNC 78
FROM
Write command
Transfer source
Number of transfer points
Unit No.
Buffer memory No.
K1 K0 K4000 K1
FNC 79
TO