Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 10)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 10
The error code number is shown in decimal (base 10). However, the codes are defined in hexadecimal
(base 16) and the number needs to be converted.
Open the Windows Calculator. Select the Scientific view (View | Scientific).
Select ‘Dec’ (decimal) as shown above. Type the error code number. Select ‘Hex’ (hexadecimal). The
calculator will convert the number.
Look up the hexadecimal number in the table in this manual. The error codes are listed in hexadecimal
number order, which is like decimal but has six extra digits: 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,10,11,...
In this case, 52?? Indicates an input channel fault. It is on channel 16, because 10 in hexadecimal is
16 in decimal.
Follow the advice given for the error code.
You can avoid having to convert the error code if an integer variable is wired to each channel, and its
format is set to 1A2B (four digit hexadecimal). The toolset will convert the value into hexadecimal for
you.
It is important to check for error codes before pressing the main processor reset pushbutton, because
pressing reset will clear all fault indications and fault filter counters. It is possible that a rare or slow
fault has occurred, due to a genuine problem, which may not occur again for some time.
Once you have collected all fault codes and noted them, you may press the processor Reset
pushbutton to clear them.