During initial startup V+ has detected that the configuration of the hardware for serial communications is not valid. An attempt has been made to configure a serial unit that is not installed or an invalid byte format or baud rate has been requested. Power down the controller and try starting it again. Make sure that the boot disk you are using is valid for your controller. Use the CONFIG_C utility program to make sure the serial I/O configuration is correct. If the problem persists contact Adept Application Engineering.