I have some problem with OPC-interfece. My interface worked good, but once I wanted that first false value not updated after restarting service or system. I read that opton IF=Y can help me. I added it option and after 2 week i found that some data does not updated in tags although it updated on OPC-server. My tag have EXMAX time and COMPMAX time, but values are not updating by this time. What I do wrong?