The software I have very old Fix32 7.0 does not have that block.
I believe you can open Draw and using help, search for "Field Parameters".
You can then choose the type of block and it will show you the "Fields" available for that block.
e.g Node:Tag.field ( MYNode:TestTag.A_CV ASCII Current Valve of this Tag)
I suspect that the block you posted is a custom block created with the Database Dynamo toolset. I have never used this so I cannot tell you how to get at the individual fields. You could try searching for details on Database Dynamo's as there is probably an electronic book which covers them.