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MELSEC-Q
4 ABOUT QD51 (-R24) FUNCTIONS
4.5.3 Reading and writing data from/to the programmable controller CPU
Data can be written to and read from the programmable controller CPU's device
memory directly by a QD51 (-R24) BASIC program.
Device Memory
• Bit device
X, Y, M, L, S,
B, F, T, C, etc.
• Word device
(T, C, D, W, R, etc.)
Reading of data
Writing of data
QD51(-R24)
BASIC
program
Programmable controller CPU
Sequence Program
Refer to the Programming Manual (Commands) for the details of the device memories
to and from which data can be written and read by the BASIC program.
[Commands and functions used]
The commands and functions used to write data to and read data from the
programmable controller CPU's device memory are shown below.
Command, Function Name Processing Contents
PCRD : Reads data from the programmable controller CPU.
PCWT : Writes data to the programmable controller CPU.