Hi Guenter, I've had a report from someone testing the BPA-RS600. When they have the input voltage set to >= 256V (apparently the PSU can handle input up to 264V). The Vin reading goes negative. CMD 0x88, VAL=0xf3f8, Vin=254 CMD 0x88, VAL=0xf3fc, Vin=255 CMD 0x88, VAL=0xf400, Vin=-256 Looking at pmbus_reg2data_linear() the mantissa is cast to s16 which is correct according to section 7.1 of the PMBUS spec which says that the mantissa is an 11-bit two's complement value. It seems that the BPA-RS600 is using a non-standard format for the mantissa (probably because the range of the standard linear encoding can't support values >255V). Does the pmbus infrastructure provide a way for me to define a custom format/conversion for a given sensor? Thanks, Chris
