Mitsubishi Electronics FX3G User Manual
526
FX
3S
/FX
3G
/FX
3GC
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3U
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3UC
Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.23 FNC135 – ATAN / Floating Point Arc Tangent
18.23 FNC135 – ATAN / Floating Point Arc Tangent
Outline
This instruction executes the TAN
−1
(arc tangent) operation.
→ For handling of floating point, refer to Subsection 5.1.3.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 32-bit operation (DATAN and DATANP)
An angle is obtained from the tangent value stored in [
+1,
], and stored to [
+1,
].
A real number can be directly specified as
.
• The angle (operation result) stored in [
+1,
] is expressed in radians (from
−π/2 to +π/2).
For conversion between radians and degrees, refer to RAD (FNC136) and DEG (FNC137) instructions.
→ For RAD (FNC136) instruction, refer to Section 18.24.
→ For DEG (FNC137) instruction, refer to Section 18.25.
→ For DEG (FNC137) instruction, refer to Section 18.25.
Operand Type
Description
Data Type
Head device number storing a tangent value used in the TAN
−1
(arc tangent) operation
Real number (binary)
Head device number storing the operation result
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
V Z Modify K H
E
" "
P
−
−
−
Mnemonic
Operation Condition
16-bit Instruction
DATAN
DATANP
Mnemonic
Operation Condition
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
P
FNC 135
ATAN
D
S
D
S
D
S
S
D
D
S
Command
input
FNC135
DATAN
S
D
+1
Binary floating point
(real number)
+1
Binary floating point
(real number)
TAN
−1
S
S
D
D
D
D