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The intelligent function module device accesses the intelligent function module every time when an instruction is executed.
When writing or reading buffer memory data using multiple intelligent function module devices in a sequence program, write
or read the data with the FROM or TO instruction in one location of the program.
Figure 7.6 Writing using multiple intelligent function module devices
Figure 7.7 Writing using the TO instruction
Writes data once in the program
Writes data to a device
such as data register (D)
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