Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 257)

6 Application Instructions API 00-49
DVP-PLC Application Manual 6-45
X0
CMP D0 D2 M0
M0
SUB D0 D2 D4
M2
SUB D2 D0 D4
M1
Remarks:
Negative value and its absolute value
a) The sign of a value is indicated by the highest (most left) bit in the register. 0 indicates that the value is a positive
one and 1 indicates that the value is a negative one.
b) NEG instruction is able to convert a negative value into its absolute value.
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(D0=2)
(D0=1)
(D0=0)
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
(D0=-1)
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
(D0)+1=1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
(D0=-2)
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
(D0)+1=2
1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1
(D0=-3)
0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0
(D0)+1=3
1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0
(D0=-4)
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
(D0)+1=4
1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1
(D0=-5)
0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0
(D0)+1=5
1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1
(D0=-32,765)
1 1 1 1 1 1 1 1 0 1 1 1 1 0 1 1
(D0)+1=32,765
1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
(D0=-32,766)
1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1
(D0)+1=32,766
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(D0=-32,767)
1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
(D0)+1=32,767
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(D0=-32,768) (D0)+1=-32,768
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Max. absolute value is 32,767