Delta-electronics Extension Digital I/O Module DOP-EXIO14RAE Uživatelský manuál stáhnout pdf (Strana 126)

Appendix D Use of Application Instructions|DOP-EXIO Series

Revision March, 2008, Doc. Name: 2007PDD23000014 D-45

Mnemonic Operands Function

NEG D

2’s Complement (Negative)

Bit Devices Word Devices

X Y M S K H KnX KnY KnM KnS T C D E F

       

y Note:

1. If D is used in device F, only 16-bit instruction is applicable.

16-bit instruction (3 Steps)

NEG

Continuous

execution

32-bit instruction (5 Steps)

DNEG

Continuous

execution

y Flags: None

Operands:

: Device to store 2’s complement

Explanations:

1. This instruction converts a negative BIN value into an absolute value.

2. This instruction can convert a negative binary value into its absolute value.

Program Example 1:

When X0 = Off→On, the phase of every bit of the content in D10 will be reversed (0→1, 1→0) and

pluses 1. The result will then be stored in D10.

NEGP D10

Program Example 2:

Obtaining the absolute value of a negative value:

a) When the 15

bit of D0 is “1”, M0 = On. (D0 is a negative value).

b) When M0 = Off→On, NEG instruction will obtain 2’s complement of D0 and further its absolute

value.

M1000

BON

D0 K15

NEGP D0

Normal ON contact

Program Example 3:

Obtaining the absolute value by the remainder of the subtraction. When X0 = On,

a) If D0 > D2, M0 = On.

b) If D0 = D2, M1 = On.

c) If D0 < D2, M2 = On.

d) D4 is then able to remain positive.

1 2 ... 121 122 123 124 125 126 127 128 129 130 131 ... 156 157

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