An Internal Write Parameter provides a connector to which you can wire on a function block diagram so that you can write a particular parameter. The parameter connector is not visible outside of the block or module by default. You can use the Show Parameter function to make an Internal Read parameter appear as an output connector on a composite block. An Internal Write Parameter can be one of the following types:
Floating point with status — a floating point value with a status indicator.
Boolean with status — a True or False value with status indicator.
32-bit unsigned integer with status — a whole number without a positive or negative sign associated with it with a status indicator.
Named Set — a value from 0 to 255 that displays an assigned text message.
When you create this parameter you configure whether its characteristic is Restore parameter value after restart or Preserve parameter value on download.