Delta AH500 Manual page 685

4. Release the mouse when the mark [+] appears with the arrow and then the master module is
added as follows.
5. Double click the master icon to enter the master configuration interface.
(Note: The PC and the CONF communication port of the master have correctly finished
connection in hardware before the communication parameters are set.)
Chapter 14 Remote I/O Communication Module AHRTU-PFBS
14-55