190
+, +P, -, -P
–
(1) Subtracts 16-bit BIN data designated by from 16-bit BIN data designated by and stores the result of the subtraction
at the device designated by .
(2) Values for , and can be designated between -32768 and 32767 (BIN, 16 bits).
(3) The judgment of whether data is positive or negative is made by the most significant bit (b15).
• 0: Positive
• 1: Negative
(4) The following will happen when an underflow or overflow is generated in an operation result:
The carry flag in this case does not go ON.
Operation Error
(1) There is no operation error in the +(P) or -(P) instruction.
Program Example
(1) The following program adds, when X5 is turned ON, the data at D3 and D0 and outputs the operation result at Y38 to
Y3F.
[Ladder Mode]
[List Mode]
(2) The following program outputs the difference between the set value for timer T3 and its present value in BCD to Y40 to
Y53.
[Ladder Mode]
[List Mode]
S1
S2
D
b0
5678
(
B
IN)
b15
b0
4444 (
B
IN)
b15
b0
123
4 (
B
IN)
b15
S1
S2
D
S1 S2
D
D
S
i
nce
b
i
t
15
va
l
ue
i
s
"
0
",
resu
l
t
of
operat
i
on
ta
k
es
a
pos
i
t
i
ve
va
l
ue
.
S
i
nce
b
i
t
15
va
l
ue
i
s
"
1
",
resu
l
t
of
operat
i
on
ta
k
es
a
negat
i
ve
va
l
ue
.
K
32767
K
2
(
7
FFF
H
)
(FFFE
H
)
K
2
(
8000
H
)
(
0002
H
)
K
32767
K
32766
(
7
FFE
H
)
(
8001
H
)
K
32768
Step
Instruction
Device
Step
Instruction
Device