About blynk nodes in nodered

Hello,I am using nodered ver v3.1.3. &In my flow i used blynk write node for sent some values. I want to know if any ways there available, if particular virt pin unfortunately disconnected, then how i will know in local dashboard and how to make disconnect the those virtual pin & again start the connection with using flow's of node. Above the criteria please anyone tell some suggestion.
Thanking you.