Mitsubishi QD51, User Manual

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MELSEC-Q
4 ABOUT QD51 (-R24) FUNCTIONS
4.5.4 Reading and writing data from/to the programmable controller CPU's expansion file
register
Data can be written to and read from the programmable controller CPU's expansion file
register (file registers after block No. 1) directly by a QD51 (-R24) BASIC program.
Refer to Section 4.5.3 concerning writing of data to and reading data from a file register
(block No. 0).
POINT
The QD51 (-R24) can read or write the expansion file register data only when
accessing an A series programmable controller via network.
Memory Cassette
File register
(Block No. 0)
Expansion
file register
Reading of data
Writing of data
QD51(-R24)
BASIC
program
A CPU
Sequence
program
[Commands and functions used]
Commands and functions used to write data to and read data from the programmable
controller CPU's expansion file register are shown below.
Command, Function Name Processing Contents
PCRD : Reads data from the programmable controller CPU.
PCWT : Writes data to the programmable controller CPU.