PM me an email address and who you work for. I have info on this PLC system. You do need software and a RS232 adapter. There is a hand held adapter which can be used for certain functions. Be very very careful using a hand held unit. Many people have lost the programs in these units with hand helds. DO back up the program or you will end up with a useless controller as the program is stored in ram which is on the backplane. The battery is located in the Power Supply. You unplug the power supply and the battery is disconnected from the ram and program is lost. I have programmed many of these units for KONE. I seriously doubt someone locked the floor out in program. Check for external clock somewhere. Maybe even be in a remote Location.