IDEC microsmart pentra, Руководство по программированию

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FT1A S
MART
A
XIS
U
SER
’
S
M
ANUAL
FT9Y-B1382 8-13
8: B
INARY
A
RITHMETIC
I
NSTRUCTIONS
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).
Example: INC
Example: DEC
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.
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.
DEC(*) S/D
*****
FT1A-12 FT1A-24 FT1A-40 FT1A-48 FT1A-Touch
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 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.
I (integer) X
D (double word) X
L (long) X
F (float) —
S/D
D10
When input I0 is turned on, the data of D10 is incremented by one. 
If the SOTU is not programmed, the data of D10 is incremented in each scan.
I0
INC(W)
SOTU
100
D10 +
101
D10 1
S/D
D20
I1
DEC(W)
SOTU
When input I1 is turned on, the data of D20 is decremented by one. 
If the SOTU is not programmed, the data of D20 is decremented in each scan.
100 D20 – 99 D20 1