Result of the selftest coded as an integer value
with each bit representing the result of a different
sub part test. Bits set in the result indicate error
conditions of the sub part tests.
Meaning of the bits:
Bit 0: selftest error of port no 1
Bit 1: selftest error of port no 2
Bit 2: selftest error of port no 3
Bit 3: selftest error of port no 4
Bit 4: selftest error of port no 5
Bit 5: selftest error of port no 6
Bit 6: selftest error of port no 7
Bit 7: selftest error of port no 8
Bit 16: selftest error of pif no 1
Bit 17: selftest error of pif no 2
Bit 30: error on module eeprom