I have an InView P22R with the external 2706-PDH485P comm module. The module requires external +24VDC to operate. It is configured (programmed) when downloading the message file to the P22R. The system works fine until the power is cycled. The PDH485P almost always loses its configuration when power is lost. The InView must be reprogrammed to resume operation. Needless to say, this is more than an inconvenience. In order to keep the system running, I added a continuous 24VDC supply for the comm module that doesn't turn off when the PLC is powered off. Occasionally mains power is lost and it's back to reprogramming. AB tech support insists this is impossible, but it happens. I found a Distributor in Austrailia that has the same problem. Any ideas on how to fix this?