Siemens SIMATIC ET 200AL, System Manual

Page: 2211 / 2255

Programming
4.3 Time-based IO
High-precision input/output with Time-based IO
Function Manual, 11/2019, A5E33454822-AC
53
Note
Once the job has been started with a positive edge at REQ, you can change the output times
with a new input of TimeStampRE and TimeStampFE without having to restart the job.
Constraint:
If a changed time stamp is less than two application cycles before the output time
(TimeStampRE - TIO_Time < 2*T
APP
or TimeStampFE - TIO_Time < 2*T
APP
), it is not taken
into consideration. In this case, the last valid time stamp is used because it was already
transferred to the TIO module.
Note
If you specify the same value for TimeStampRE and TimeStampFE, the instruction ignores
the job and does not output an edge.
If you specify the value 0 for TimeStampRE or TimeStampFE, you can output the respective
edge directly at the digital output with the input parameter Out_Mode = 3. This gives you the
option to implement a direct control from the TIO module without time stamp in manual
mode. You can use the direct control to interrupt an ongoing job.
Reaction to error
The Error output indicates if the instruction was processed correctly. In the event of an error,
the cause of the error is displayed at the Status output.