Delta DVP-ES2 Manual do Utilizador descarregar pdf (Página 439)

100

101

3. Instruction Set

3-323

API Mnemonic Operands Function

134

D ACOS P

Arc Cosine

Controllers

ES2/EX2 SS2 SA2

SX2

Bit Devices Word devices Program Steps Type

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

* * *

D *

DACOS, DACOSP: 9

steps

PULSE 16-bit 32-bit

ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2 ES2/EX2 SS2

SA2

SX2

Operands:

S: Source device (binary floating value) D: Operation result

Explanations:

1. ACOS instruction performs arc cosine operation on S and stores the result in D

2. ACOS value = COS

-1

3. See the figure below for the relation between the input S and the result:

0 1,0-1,0

S: Input (COS value)

R: Result (ACOS value)

4. If operation result in D is 0, Zero flag M1020 = ON.

5. The decimal value of the COS value designated by S should be within -1.0 ~ +1.0. If the value

exceeds the range, M1067 and M1068 will be ON and instruction will be disabled.

Program Example:

When X0 = ON, DACOS instruction performs arc cosine operation on the binary floating value in (D1,

D0) and stores the ACOS value in (D11, D10) in binary floating format.

D0 D10

DACOS

1 2 ... 434 435 436 437 438 439 440 441 442 443 444 ... 701 702

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