Critical vs. non-critical errors, Critical vs. non-critical errors -4, I/o module errors -4 – Rockwell Automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I/O Combination Module User Manual
Page 64: I/o module errors, Mod_error field
Publication 1769-UM008A-EN-P - November 2001
5-4 Module Diagnostics and Troubleshooting
Critical vs. Non-Critical
Errors
Critical errors signal conditions that prevent normal or recoverable
operation of the system. When these types of errors occur, the system
leaves the run or program mode of operation until the error is
remedied. See Table 5.2 Extended Error Codes on page 5-5 for more
information on critical module errors.
Non-critical errors are recoverable and can be dealt with by running
the Fault routine. For example, a channel over-range condition is a
non-critical error. See Table 5.2 Extended Error Codes on page 5-5 for
more information.
I/O Module Errors
The analog I/O modules notify the host of critical and non-critical
module errors. Word 0 contains the error codes generated by the
module. The module errors are expressed as two fields: Mod_Error
(bits 9, 10, and 11) and Extended_Error_Info (bits 0 to 8). The
following table shows the error fields:
r = read only
Mod_Error Field
The Mod_Error field classifies module errors into three groups:
•
No Errors (Mod_Error = 0): The module has no errors. There is
no need to check the Extended_Error_Info field.
•
Hardware Errors (Mod_Error = 1): Check the
Extended_Error_Info field for general and specific error codes.
•
Configuration Errors (Mod_Error = 2): Check the
Extended_Error_Info field for module-specific error codes.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
Mod_Error
Extended_Error_Info
Output_State
Mod_Configured
Bus_WD_Timeout_Latch