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If there is a time-out (parameter ?0D[7LPH) before an input from the operator, the system variable ERRNO is set to ERR_TP_MAXTIME and the execution continues in the
error handler.
If digital input is set (parameter ?',%UHDN) before an input from the operator, the system variable ERRNO is set to ERR_TP_DIBREAK and the execution continues in the
error handler.
If a digital output is set (parameter ?'2%UHDN) before an input from the operator, the
system variable ERRNO is set to ERR_TP_DOBREAK and the execution continues
in the error handler.
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If there is no client, e.g. a Flex Pendant, to take care of the instruction, the system variable ERRNO is set to ERR_TP_NO_CLIENT and the execution continues in the error
handler.
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Avoid using a too small value for the time-out parameter ?0D[7LPHwhen 8,0VJ%R[
is frequently executed, for example in a loop. It can result in an unpredictable behavior
of the system performance, like slow TPU response.
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