Description
You can use the "Form absolute value" instruction to calculate the absolute value of the value specified 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".
-
A floating-point number has an invalid value.
Parameters
The following table shows the parameters of the instruction "Form absolute value":
|
Parameters |
Declaration |
Data type |
Memory area |
Description |
||
|---|---|---|---|---|---|---|
|
S7-1200 |
S7-1500 |
S7-1200 |
S7-1500 |
|||
|
EN |
Input |
BOOL |
BOOL |
I, Q, M, D, L or constant |
I, Q, M, D, L, T, C or constant |
Enable input |
|
ENO |
Output |
BOOL |
BOOL |
I, Q, M, D, L |
I, Q, M, D, L |
Enable output |
|
IN |
Input |
SINT, INT, DINT, floating-point numbers |
SINT, INT, DINT, LINT, floating-point numbers |
I, Q, M, D, L, P or constant |
I, Q, M, D, L, P or constant |
Input value |
|
OUT |
Output |
SINT, INT, DINT, floating-point numbers |
SINT, INT, DINT, LINT, floating-point numbers |
I, Q, M, D, L, P |
I, Q, M, D, L, P |
Absolute value of the input value |
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 |
TagIn_Value |
-6.234 |
|
OUT |
TagOut_Value |
6.234 |
If the "TagIn" operand has signal state "1", the instruction is executed. The instruction calculates the absolute value of the value at input "TagIn_Value" and sends the result to output "TagOut_Value". If the instruction is executed without errors, the "TagOut" output is set.