IDEC MICROSmart FC5A Series, Руководство пользователя

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5: Binary Arithmetic Instructions
FC5A MicroSmart User’s Manual FC9Y ‐ B1273 5 ‐ 13
INC (Increment)
DEC (Decrement)
Applicable CPU Modules
Valid Devices
For the valid device address range, see pages 6 ‐ 1 and 6 ‐ 2
(
Basic Vol.).
Since the INC and DEC instructions are executed in each scan while input is on, a pulse input from a SOTU or SOTD instruction should
be used as required.
Valid Data Types
Increment beyond Limits
When the S/D value is at its maximum and incremented by one, the value returns to 0, turning on the carry (M8003).
Decrement beyond Limits
When the S/D value is at its minimum and decremented by one, the value returns to its maximum value (word or double ‐
word data type) or to –1 (integer or long data type), turning on the borrow (M8003).
FC5A ‐ C10R2/C/D FC5A ‐ C16R2/C/D FC5A ‐ C24R2/C/D FC5A ‐ D16RK1/RS1 FC5A ‐ D32K3/S3 FC5A ‐ D12K1E/S1E
X X X X X X
Device Function I Q M R T C D Constant Repeat
S/D (Source/Destination) Device to increment data — — — — — — X — —
W (word) X
I (integer) X
D (double word) X
L (long) X
F (float) —
Data type W or I: S/D + 1

S/D
Data type D or L: S/D ∙ S/D+1 + 1

S/D ∙ S/D+1
When input is on, one is added to the 16 ‐ or 32 ‐ bit data designated by device S/D and the result
is stored to the same device.
This instruction is available on upgraded CPU modules with system program version 210 or
higher.
INC(*) S/D
*****
Data type W or I: S/D – 1

S/D
Data type D or L: S/D ∙ S/D+1 – 1

S/D ∙ S/D+1
When input is on, one is subtracted from the 16 ‐ or 32 ‐ bit data designated by device
S/D and the result is stored to the same device.
This instruction is available on upgraded CPU modules with system program version 210 or
higher.
DEC(*) S/D
*****
When a word device such as D (data register) is designated as the source/destination, 1 point (word or
integer data type) or 2 points (double ‐ word or long data type) are used.