JCM Part No . 960 - 000053R _ Rev . 6 © 2007, JCM American, Corporation 6 - 2 6 Section 6 AD - 02™ Retrievable Bill Validator Programming and Testing Compulsory Download State Flow Diagram Figure 6 - 58 illustrates a compulsory download sequence state of Command/Response information flow in an AD - 02™ Unit . Figure 6 - 58 AD - 02 Compulsory Download State Command/Response Sequence Flow Diagram