Klinkmann_Msk » Ср июл 14, 2010 1:50 pm
To rig12:
Из хелпа на $Boolean:
Special Set Handling
PV is the only attribute that can be written to at run time. If the object has feedback, then the feedback value, time stamp, and quality is transferred into the PV attribute. If the object has an output, then the value is transferred to output.value. Only when the object does not have feedback will an external write to PV be transferred directly into the attribute.
If you configure the object as WriteOnly or ReadWrite, the original time stamp associated with the value provided by the set request is always forwarded to the output. If only the Time property of the PV is set, the current value of PV and the requested time stamp is forwarded to the output. In WriteOnly mode, the PV time stamp is updated to the current time if the set request contains a zero time stamp or the provided time stamp of the set request contains a non-zero time stamp.