(1) connect the direct connect cable to AUXILIARY MODULE;
(2) use keypad to change Subscriber ID (location 52 to 55) to be not 0000, e.g, 0001;
(3) choose the correct COM port on A_Link Plus;
(4) choose "Legacy" and "S16" and the firmware version;
(5) put in the new Subscriber ID;
Then click "connect" on A_Link Plus, it should connect successfully.
A-link Download link : A-Link Plus 5.2.0 -