Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 452)

8 Application Instructions API 100-149
DVP-PLC Application Manual 8-50
API Mnemonic Operands Function
134 D ACOS P Arc Cosine
Controllers
ES/EX/SS SA/SX/SC EH/SV
Bit Devices Word Devices Program Steps Type
OP X Y M S K H KnX KnY KnM KnS T C D E F
S * * *
D *
DACOS, DACOSP: 9 steps
PULSE 16-bit 32-bit
ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV
Operands:
S : Source value (binary floating point) D: ACOS result
Explanations:
1. See the specifications of each model for their range of use.
2. Flag: M1020 (zero flag)
3. ACOS value=cos –1 . The figure below offers the relation between the entered cos value and the result.
S: Entered data (cosine value)
R: ACOS value (radian)
R
S
2
0 1,0 -1,0
4. The decimal floating point of the COS value designated by S should be within -1.0 ~ +1.0. If the value falls
without the range, M1067 and M1068 will be On without performing any action.
5. If the result = 0, M1020 = On.
Program Example:
When X0 = On, obtain the ACOS value of binary floating point (D1, D0) and store the binary floating point result in
(D11, D10).
DACOS
X0
D0 D10
D1 D0
D11 D10 ACOS value
binary floating point
binary floating point
Remarks:
For floating point operations, see “5.3 Handling of Numeric Values”.