- I cannot logon to an AC256 or AC8 controller.
- My AC256 Xdriver has stopped communicating with the AC256.
Unable to establish communications with an AC256 type controller.
The attached document contains a thorough set of procedures for troubleshooting communication issues between an AC256 controller and a computer that is running a terminal emulator program such as ProComm or HyperTerminal. This requires that the computer have a available serial port or a USB to serial converter.