This property allows controlling feedback from OPC Tag writings. The configuration options of this property are described on the next table.
Available options for the WriteFeedbackMode property
Option |
Description |
|---|---|
0 - wfWaitNextRead |
After writing, waits normally for the next reading, which is the default for applications created before the implementation of this property |
1 - wfImmediateReadAfterWrite |
Forces an asynchronous reading from a device right after each writing, which is the default for applications created after the implementation of this property |
2 - wfTrustWriteSuccess |
The written value is assumed by the OPC Tag immediately, if the writing succeeds |
NOTES |
•This property cannot be changed while this object is active. •In the option 2 - wfTrustWriteSuccess, for asynchronous writings, the value is assumed in the OPC Tag right after scheduling that writing, if the operation succeeds. However, if that writing fails later, the value in the OPC Tag may be incorrect. For synchronous writings, this value is assumed right after that writing finishes, if it succeeds. •Please check I/O Driver's WriteFeedbackMode property, whose behavior is similar. |