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MELSEC-Q
4 ABOUT QD51 (-R24) FUNCTIONS
4.5.2 Reading and writing data from/to buffer memory
16-bit data communications can be carried out between the QD51 (-R24) and the
programmable controller CPU using the QD51 (-R24)'s buffer memory.
Writing of
16-bit data
Reading of data
Writing of data
QD51(-R24)
Reading of
16-bit data
BASIC
program
Buffer
memory
Programmable controller CPU
Sequence Program
TO
FROM
(1) In the case of programmable controller CPU QD51 (-R24)
16-bit data written to the QD51 (-R24)'s buffer memory by the programmable
controller CPU's sequence program (TO command) are read using a BASIC
program.
(2) In the case of QD51 (-R24) Programmable controller CPU
16-bit data written to the QD51 (-R24)'s buffer memory by a BASIC program are
read by the programmable controller CPU's sequence program (FROM
command).
[Commands and functions used]
Commands and functions used to read/write 16-bit data from/to the QD51 (-R24)'s
buffer memory are shown below.
Command, Function Name Processing Contents
GETMEM : Reads the contents of the QD51 (-R24)'s buffer memory.
PUTMEM : Writes 16-bit data to the QD51 (-R24)'s buffer memory.
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