Mitsubishi MELSEC Q Series Programming Manual page 298

NEG(P),DNEG(P)
DNEG
(1) Reverses the sign of the 32-bit device designated by
by
D
Before
execution
Sign
conversion -
After
execution
(2) Used when reversing positive and negative signs.
Operation Error
(1) There are no operation errors associated with the NEG(P) or DNEG(P) instruction.
Program Example
(1) The following program calculates a total for the data at D10 through D20 when XA goes ON,
and seeks an absolute value if the result is negative.
[Ladder Mode]
[List Mode]
Step
6-96
.
b31
D 1 1 1 1 1
1 0 0 0 0 0
1 1 1 1 1
b31
0 0 0 0 0
D
Instruction Device
and stores at the device designated
D
32 bit
1 1 0 1 0 0
0 0 0 0 0 0
1 1 0 1 0 0
0 0 1 0 1 1
M3 is turned ON if D10 < D20.
Executes "D10 - D20".
Calculates the absolute value
(complement of 2) when M3 is ON.
b0
1 0 0
-218460
0 0 0
1 0 0
b0
1 0 0
218460