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7 PROGRAMMING
7 PROGRAMMING
This chapter gives program examples of station number setting, I/O data
communication, and global control-driven program execution.
Before using the program examples introduced in this chapter in an actual system, fully
check that there is no problem in control on the target system.
7.1 Communication Sequence
The following is the sequence of I/O data communication with the master station.
Refresh between the programmable controller CPU and QJ71PB93D and refresh of
the QJ71PB93D buffer memory (output receive area, input send area) are executed
asynchronously.
(1) When using the automatic refresh
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Start
Make sure that the I/O
communication signal (X01) is on.
Write the initial input data value to
the device set in "Output CPU
Device" of the automatic refresh
parameter.
Turn on the input send area
refresh directive signal (Y00).
Communication
Refer to Section 3.3.2 (2)
Refer to Section 5.3.1
Refer to Section 3.3.2 (13)
MELSEC-Q
7
7 - 1
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