Critical And Non-Critical Errors; Module Error Definition Table - Allen-Bradley MicroLogix 1200 User Manual

Table C.3 Module Error Table
"Don't Care" Bits
15 14 13
0 0 0
Hex Digit 4

Critical and Non-Critical Errors

Non-critical module errors are recoverable. Channel errors (over-range
or under-range errors) are non-critical. Non-critical error conditions
are indicated in the module input data table. Non-critical configuration
errors are indicated by the extended error code. See Table C.5 on
page C-7.
Critical module errors are conditions that prevent normal or
recoverable operation of the system. When these types of errors
occur, the system leaves the run mode of operation. Critical module
errors are indicated in Table C.5 on page C-7.

Module Error Definition Table

Analog module errors are expressed in two fields as four-digit Hex
format with the most significant digit as "don't care" and irrelevant.
The two fields are "Module Error" and "Extended Error Information".
The structure of the module error data is shown below.
Module Error
12 11 10 9
0 0 0 0
Hex Digit 3
Extended Error Information
8 7 6 5
0 0 0 0
Hex Digit 2
Troubleshooting Your System
4 3 2
0 0 0
Hex Digit 1
Publication 1762-UM001D-EN-P - March 2004
C-5
1 0
0 0