FP2/FP2SHI/O Allocation
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3.1 Fundamentals of I/O Allocation
3.1.1.3 How to Count the I/O Numbers and Express the Occupied Points
How to count the I/O numbers (relay numbers)
Since I/O number are handled in units of 16 points, they are expressed as a combination
of decimal and hexadecimal numbers as shown below.
Decimal
,1,2,3 9.....
Hexadecimal
0, 1, 2, 3 9, A, B F..... ...
]
7F21
How to express the occupied points
In the programming tool and this manual, the occupied points are expressed in the fol-
lowing fashion for convenience.
Occupied I/O points
16, 32, 64, 128
Type of unit
Nil: I/O unit
S: Intelligent unit
Type of I/O
X: Input, Y: Output, E: without I/Os
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