From/To Instructions - Mitsubishi Electric MELSEC-F Series User Manual

FX -1PG User's Manual
3U
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.
Read command
Unit No.
Buffer memory No.
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.
Write command
Unit No.
Buffer memory No.
FNC 78
K1 K30
FROM
FNC 79
K1 K0
TO
7.1 How to Read/Write from/to Buffer Memory
D10 K1
Number of transfer points
Transfer destination
K4000 K1
Number of transfer points
Transfer source
7 Buffer Memory
1
2
3
4
5
6
7
8
9
10
51