Add additional sensor for measured faults

[syssi]

  // register 32: Grid voltage fault in 0.1V
  // register 34: Grid frequency fault in 0.01Hz
  // register 36: DC injection fault in 1mA
  // register 38: Temperature fault in °C
  // register 40: Pv1 voltage fault in 0.1V
  // register 42: Pv2 voltage fault in 0.1V
  // register 44: GFC fault