6 Application Instructions API 00-49 X0 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. (D0=2) (D0=1) (D0=0) (D0=-1) (D0)+1=1 (D0=-2) (D0)+1=2 (D0=-3) (D0)+1=3 (D0=-4) (D0)+1=4 (D0=-5) (D0)+1=5 (D0=-32,765) (D0)+1=32,765 (D0=-32,766) (D0)+1=32,766 (D0=-32,767) (D0)+1=32,767 (D0=-32,768) (D0)+1=-32,768 Max.
absolute value is 32,767 DVP-PLC Application Manual 6-49 CMP D0 D2 M0 SUB D0 D2 D4 SUB D2 D0 D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0