ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. C
6-4
· Diagnosis: main processor 316VC61a/316VC61b ready
(0001H).
· Diagnosis: A/D processor EA6. not ready.
The external A/D processor 316EA62 or 316EA63 is not
ready. This occurs during normal operation, because the A/D
processor on the 316VC61a/316VC61b is active.
· Diagnosis: internal A/D ready (0001H)
The A/D processor on the 316VC61a/316VC61b is ready.
· Diagnosis: system status: OK.
The above list of diagnostic messages reflects the operating
state when the device is standing by. The following messages
and hexadecimal weightings can be generated by a fault.
Designation Function Weighting
RDY Device standing by 0001H
WDTO Watchdog time-out 0002H
WDDIS Watchdog disabled 0004H
HLT Stop procedure initiated 0008H
SWINT Software interrupt 0010H
RAM RAM error 0100H
ROM ROM error 0200H
VREF Reference voltage out-of-tolerance 0400H
ASE A/D converter error 0800H
EEPROM Parameter memory error 2000H
The hexadecimal weighting of an error message may also be the
addition of simpler errors. For example, VREF and ASE are re-
corded as 0400H + 0800H = 0C00H.
Failures with a weighting less than 080H are listed as ‘minor er-
rors’, e.g. a warm start after pressing the reset button.
Failures with a weighting higher than 0100H are ‘fatal errors’ and
result in blocking of the protection and control functions.
Note: Normally, a fatal error always concerns the entire device.
An exception to this rule occurs when an EEPROM error is de-
tected on a 316EA62 or 316EA63.
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