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MELSEC-Q
1 OVERVIEW
(3) Data communications with the programmable controller are
possible
Data can be sent to or received from a programmable controller CPU installed
with the QD51(-R24) or the one on the MELSECNET/H or MELSECNET/10
network.
The types of data which can be sent to and received from a programmable
controller CPU are shown below.
1) Device writing and reading in the programmable controller CPU (Max. 960
words/1 time)
2) Writing to and reading from the buffer memory in the intelligent function
module (Max. 960 words/ 1 time).
3) Remote RUN/STOP of the programmable controller CPU.
4) Interrupts to the programmable controller CPU.
(4) File control is possible
Using the console's FD or HD (hard disk), sequential files and random files can
be handled.
However, it is necessary that the console be connected at all times.
<Sequential Files>
These are files in which data can be read and written sequentially and which
enable efficient use of memory.
They are used mainly for operating instruction data files and results files, etc.
<Random Files>
These are files where reading starts from the necessary portion only and only the
necessary portion is written.
This type of file is appropriate for large volume inventory files, instruction data for
operator interfaces, master files, etc.
When reading or writing is done one time, the maximum data size is 256 bytes.
(5) Offline programming with a text editor is possible
A BASIC program can be created offline using a text editor, and the BASIC
program can then be registered.
In offline programming, the edited program cannot be run.
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