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3. Input/Output Signals
3.3 High-Speed Input/output Designation Method
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3.3 High-Speed Input/output Designation Method
High-speed input/output is designated by setting the corresponding bit of the bit selection parameter
as shown below.
(1) High-speed input designation
7 6 5 4 3 2 1 0
Bit
selection
parameter
#6457
These bits
correspond to the
low-order byte
(bits 0 to 7) of file
register R4628
#6458
These bits
correspond to the
high-order byte
(bits 8 to F) of file
register R4628
(2) High-speed output designation
7 6 5 4 3 2 1 0
Bit
selection
parameter
#6461
These bits
correspond to the
low-order byte
(bits 0 to 7) of file
register R4630
#6462
These bits
correspond to the
high-order byte
(bits 8 to F) of file
register R4630
· As listed above, one bit corresponds to two bytes (16 points).
· Input or output in which 1 is set in the table is not performed at the main processing program
level.
· Although the number of bits set to 1 is not limited, set only necessary ones from viewpoint of
overhead.
· High-speed input/output designation corresponds to the bit selection parameter and can be
set in the parameter. However, it is recommended to set in a sequence program to prevent a
parameter setting error, etc.
Example: —[MOV H3
R4628]— ..... To designate X00~X0F, X10~X1F
Bits 0 and 1