Description
You can use the "Form cosine value" instruction to calculate the cosine of an angle. The size of the angle is specified in the radian measure at input IN. The result of the instruction is output at the OUT output and can be queried there.
The enable output ENO has the signal state "0" if one of the following conditions applies:
-
Enable input EN has the signal state "0".
-
The value at input IN is not a valid floating-point number.
Parameters
The following table shows the parameters of the instruction "Form cosine value":
|
Parameters |
Declaration |
Data type |
Memory area |
Description |
|
|---|---|---|---|---|---|
|
S7-1200 |
S7-1500 |
||||
|
EN |
Input |
BOOL |
I, Q, M, D, L or constant |
I, Q, M, D, L, T, C or constant |
Enable input |
|
ENO |
Output |
BOOL |
I, Q, M, D, L |
I, Q, M, D, L |
Enable output |
|
IN |
Input |
Floating-point numbers |
I, Q, M, D, L, P or constant |
I, Q, M, D, L, P or constant |
Size of the angle in radians |
|
OUT |
Output |
Floating-point numbers |
I, Q, M, D, L, P |
I, Q, M, D, L, P |
Cosine of the specified angle |
You can select the data type of the instruction from the "???" drop-down list of the instruction box.
For additional information on valid data types, refer to "See also".
Example
The following example shows how the instruction works:
The following table shows how the instruction works using concrete operand values:
|
Parameters |
Operand |
Value |
|---|---|---|
|
IN |
Tag_Value |
+1.570796 (π/2) |
|
OUT |
Tag_Result |
0 |
If the "TagIn" operand has signal state "1", the instruction is executed. The instruction calculates the cosine of the angle specified at input "Tag_Value" and sends the result to output "Tag_Result". If the instruction is executed without errors, the "TagOut" output is set.