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7.2 Data Communication between Intelligent Function Modules and CPUs
An intelligent function module and a CPU exchange mainly two formats of data.
Bit data ------------Signals that use input Xs and output Ys
Word data --------16-bit data or 32-bit data
(Programmable controller CPU)
QCPU
Device memory such as
X, Y, M, T, C, D
Program
(Bit data)
X/Y
(Word data)
Function
CPU
External I/F
Buffer memory
Input X
Output Y
Reading data
Writing data
Internal configuration of the intelligent function module
Figure 7.2 Internal configuration of the intelligent function module