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Type
| Function |
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Description
| Subtracts two times (LDATE) and delivers a duration (LTIME) as result. The point in time connected to IN2 is subtracted from the point in time connected to IN1.The result duration is positive if the point in time at IN1 is more recent (greater) than the point in time at IN2. The result is negative if the point in time at IN1 is less recent (smaller) than the point in time at IN2.
Note
This function is not extendable, no further inputs can be added. |
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| Notes | When the subtraction result exceeds the permissible range of the output value, an overflow occurs. |
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Parameters
| Inputs
 IN1
| Data type: | LDATE |
| Description: | Point in time to subtract from. |
IN2
| Data type: | LDATE |
| Description: | Point in time subtracted from IN1. |
Output
Out
| Data type: | LTIME |
| Description: | Difference (duration) of the two input points of time. |
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Error behavior
| Error behavior
The following table shows the errors which may occur while executing the function and the value returned by the function in the corresponding error case.
| Error case | Output value |
| Overflow | Overflow value |
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Additional information
| EN/ENO behavior
The POU is only executed if TRUE is applied to the EN input. If EN = FALSE, the POU is not executed and ENO = FALSE indicates the inactivity.
If any of the errors listed under "Error behavior" occurs while executing the function, ENO is set to FALSE.
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