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D+, D+P, D-, D-P
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8
6.2 Arithmetic Operation Instructions
6.2.2 D+, D+P, D-, D-P
D-
(1) Subtracts 32-bit BIN data designated by from 32-bit BIN data designated by and stores the result of the subtraction
at the device designated by .
(2) The values for , and can be designated at between -2147483648 and 2147483647 (BIN 32 bits).
(3) Judgment of whether the data is positive or negative is made on the basis of the most significant bit (b31).
• 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 D+(P) or D-(P) instruction.
Program Example
(1) The following program adds 28-bit data from X10 to X2B to the data at D9 and D10 when X0 goes ON, and outputs the
result of the operation to Y30 to Y4B.
[Ladder Mode] [List Mode]
(2) The following program subtracts the data from M0 to M23 from the data at D0 and D1 when XB goes ON, and stores the
result at D10 and D11.
[Ladder Mode] [List Mode]
S1
S2
D
123456 (BIN)
b0b16 b15
+1
567890 (BIN)
b31
+1
444434 (BIN)
+1
S1 S2
D
S1 S2
D
b0b16 b15b31 b0b16 b15b31
S1
S2
D
Since bit 31 value is "0",
result of operation takes a positive value.
Since bit 31 value is "1",
result of operation takes a negative value.
K 2147483648
(80000000H)
K2147483647
(7FFFFFFFH)
K2
(00000002
H)
K 2
(FFFFFFFEH)
K214748364
6
K 214748364
7
(80000001H)
(7FFFFFFEH)
Step
Instruction
Device
Step
Instruction
Device
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