Rad (Degree To Radian) - IDEC MICROSmart FC6A Series Ladder Programming Manual

21: T
RIGONOMETRIC
Introduction
This chapter describes the trigonometric function instructions that are used to calculate sine, cosine, and tangent from an angle.

RAD (Degree to Radian)

RAD(F)
*****
Valid Devices
Device
S1 (Source 1)
D1 (Destination 1)
For the valid device address range, see "Device Addresses" on page 2-1.
When the conversion result is not within the range between –3.402823 × 10
38
3.402823 × 10 , special internal relay M8003 (carry or borrow) is turned on except when the conversion result is 0. When the conversion result is
–38
between –1.175495 × 10
M8003
Execution Result
When the data designated by S1 does not comply with the normal floating-point format, a user program execution error will result, turning on
special internal relay M8004 and ERR LED on the FC6A Series MICROSmart. For details about the user program execution errors, see "User Program
Execution Errors" on page 3-10.
Since the RAD instruction is executed in each scan while input is on, a pulse input from a SOTU or SOTD instruction should be used.
Valid Data Types
W (word) —
I (integer) —
D (double word) —
L (long) —
F (float) X
Example: RAD
RAD(F)
SOTU
I1
S1·S1+1° ×
S1 D1
When input is on, the degree value assigned by source device S1 is converted into a radian value
*****
and stored to the destination assigned by device D1.
Function
Degree value to convert into radian
Destination to store conversion results
–38
and 1.175495 × 10 , the destination device designated by D1 stores 0.
Overflow
1
×
38
–3.402823 10
Since floating point data is used, the source and destination devices use two consecutive data registers.
S1 D1
D10 D20
FC6A S MICROS
ERIES MART
F
UNCTION
π
/180 → D1·D1+1 rad
I Q
— —
— —
38
and –1.175495 × 10
Not Zero
0 1 0 1
×
–38
–1.175495 10 0
When input I1 is turned on, the degree value of data registers D10 and D11 assigned by
source device S1 is converted into a radian value and stored to data registers D20 and
D21 assigned by destination device D1.
π
270° × /180 → 4.712389 rad
S1
270.0
D10·D11
L P M
ADDER ROGRAMMING
I
NSTRUCTIONS
M R T C D P
— — — — X —
— — — — X —
–38
or between 1.175495 × 10
0
×
–38
1.175495 10
D20·D21
FC9Y-B1726
ANUAL
Constant Repeat
X —
— —
–38
and
Overflow
1
×
38
3.402823 10
D1
4.712389
21-1