Add a digital state set using multiple istructure lines

This method uses multiple istructure command lines.

1. Select the digital state table:

   (Ls - PIDS) piconfig> @table pids

2. Prepare to write to the table:

   (Ls - PIDS) piconfig> @mode create

3. Specify an input data format that consists of a digital state set name followed by any number of states in the set:

   (Cr - PIDS) piconfig> @istructure set
   (Cr - PIDS) piconfig> @istructure state
   (Cr - PIDS) piconfig> @istructure ...
   

   The input lines are the set name followed by any number of states. For example:

   (Cr - PIDS) piconfig> ValveStateSet
   ValveStateSet
   (Cr - PIDS) piconfig> Open
   Open
   Cr - PIDS) piconfig> Closed
   Closed
   

   Subsequent lines are treated as input until the next piconfig command is issued.