DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

3. Instruction Set
API Mnemonic Operands Function
134 D ACOS P Arc Cosine
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Type
Bit Devices Word devices Program Steps
OP X Y M S K H KnX KnY KnM KnS T C D E F
S * * *
D *
Operands:
S: Source device (binary floating value) D: Operation result
DACOS, DACOSP: 9
steps
PULSE 16-bit 32-bit
ES2/EX2 SS2 SA2
SA2
SA2
SX2 ES2/EX2 SS2 SX2 ES2/EX2 SS2
SE SE SE SX2
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:
R
S: Input (COS value)
R: Result (ACOS value)
2
-1,0
0 1,0
S
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.
X0
DACOS
D0
D10
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