When using the command snippet in Mechanical , APDL Name option under local coordinate system creation allows you to create an APDL parameter (in the input file), it is text-based input. And with that you can assign its value to the reference number of the coordinate system. For example, your automatic coordinate ID is 15 and you have given APDL Name as “My_CS”. Then it will create parameter My_CS = 15 in the input file. This facilitates easy programmatic identification of the coordinate system for later use/reference in a Command object.