Allen-Bradley MicroLogix 1200, User Manual, Page: 73 / 144

Publication 1762-UM002A-EN-P - July 2002
Diagnostics and Troubleshooting 4-5
in the controller’s I/O status file. Refer to your controller manual for
details.
Extended Error Information Field
Check the extended error information field when a non-zero value is
present in the module error field. Depending upon the value in the
module error field, the extended error information field can contain
error codes that are module-specific or common to all 1769 analog
modules.
Hardware Errors
General or module-specific hardware errors are indicated by module
error code 001. See Table 4.3 Extended Error Codes on page 4-6.
Configuration Errors
If you set the fields in the configuration file to invalid or unsupported
values, the module generates a critical error.
Table 4.3 Extended Error Codes on page 4-6 lists the possible
module-specific configuration error codes defined for the modules.
Table 4.2 Module Error Types
Error Type Module Error
Field Value
Bits 11 through 9
(binary)
Description
No Errors 000 No error is present. The extended error field
holds no additional information.
Hardware
Errors 001 General and specific hardware error codes are
specified in the extended error information field.
Configuration
Errors 010 Module-specific error codes are indicated in the
extended error field. These error codes
correspond to options that you can change
directly. For example, the input range or input
filter selection.
TIP
If no errors are present in the module error
field, the extended error information field is set
to zero.
AB Parts