Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 453)

8 Application Instructions API 100-149
DVP-PLC Application Manual 8-51
API Mnemonic Operands Function
135 D ATAN P Arc Tangent
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 *
DATAN, DATANP: 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: ATAN value
Explanations:
1. See the specifications of each model for their range of use.
2. Flag: M1020 (zero flag)
3. ATAN value=tan –1 . The figure below offers the relation between the entered tan value and the result.
S: Entered data (tangent value)
R: ATAN value (radian)
R
S
2
2
-
0
4. If the result =0, M1020 = On.
Program Example:
When X0 = On, obtain the ATAN value of binary floating point (D1, D0) and store the binary floating point result in
(D11, D10).
DATAN
X0
D0 D10
D1 D0
D11 D10 ATAN value
binary floating point
binary floating point
Remarks:
For floating point operations, see “5.3 Handling of Numeric Values”.