Rockwell Automation T8160 Trusted TMR Interface - Manual (Page 78)

Trusted TM TMR Module T8160
Issue 13 May 13 PD-T8160 78
6. Fault Finding and Maintenance
6.1. Fault Reporting
Input module faults are reported to the user through visual indicators (LEDs) on the front panel of the
module. Faults are also reported via status variables which may be automatically monitored in the
application programs, and external system communications interfaces. There are generally two types
of faults that must be remedied by the user; external wiring and module faults. External wiring faults
require corrective action in the field to repair the fault condition. Module faults require replacement of
the module.
6.2. Testing and Diagnostics
The Trusted TM TMR Interface carries out background diagnostic checks, in the form of simple
hardware tests, during module operation. The checks last for the duration of module operation and
test the following:
These diagnostic checks are contained in the module firmware and are executed after each I/O scan.
The results of the checks are stored and made available for reporting back to the Trusted
TM TMR
Processor.
• Voters
• Memory
• Fault detectors
• Processor registers
• I/O sub-system (all modules)