Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
IN1 |
ANY |
|
|
|
First input. |
|
IN2 |
ANY |
|
|
|
Second input. |
Outputs
|
Output |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
Q |
BOOL |
|
|
TRUE if IN1 is not equal to IN2. |
Remarks
- Both inputs must have the same type.
- Comparisons can be used with strings.
- With strings, the lexical order is used for comparing the input strings.
- Examples:
ABC is less than ZX.
ABCD is greater than ABC.
- Examples:
- With strings, the lexical order is used for comparing the input strings.
- Equality comparisons cannot be used with TIME variables.
- This is because the timer actually has the resolution
The resolution is the smallest possible movement that can be achieved by a system.
It can be defined at the electronics, encoder and mechanics level.
The distance a stage can be commanded to move in a single step.
For servo systems, the basic increment produced by its optical encoder, or any other feedback device. of the target cycle and test can be unsafe as some values can never be reached.
- This is because the timer actually has the resolution
FBD Language Example
FFLD Language Example
- In the FFLD Language, the input rung (EN) enables Enable signal for the drive, Hardware-Enable with 24V signal to X8, Software-Enable command by setup Software, fieldbus or permanently set.
Both are required for enabling the drive. the operation.
- The output rung is the result of the comparison.
- The comparison is executed only if EN is TRUE.
IL Language Example
- In the IL Instruction list - This is a low-level language and resembles assembly. Language, the NE instruction performs the comparison between the current result and the operand.
- The current result and the operand must have the same type.
Op1: FFLD IN1
NE IN2
ST Q (* Q is true if IN1 is not equal to IN2 *)
ST Language Example
Q := IN1 <> IN2;
See Also
