Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 94
Table 8-3. LED Indications of Failure
Number of Fault LED Flashes Failure
1 Watchdog Failure
2 No Application
3 Flash Memory Failure
4 Exception Failure
5 FPGA Failure
6 Non-Volatile Memory Error
7 Kernel Watchdog Error
8 MFT Failure
9 Software Slip
10 Ram Memory Failure
11 Software Failure
Fault Detection (I/O)
In addition to detecting MicroNet Discrete I/O Smart-Plus module hardware faults, the application
software may detect I/O faults.
Discrete Output Faults: The module monitors the FTM control voltage and annunciates faults. The
application software determines the course of action in the event of a fault.
Microcontroller Faults: The system monitors a software watchdog, a hardware watchdog, and a software
watchdog on the VME bus communications. All outputs are shut down in the event of a microcontroller
fault.
Figure 8-10. 48/24 Discrete Combo Module Block Diagram
If during normal control operation all of a chassis’ MicroNet Discrete I/O Smart-Plus modules have Fault
LEDs on, check the chassis’ CPU module for a failure. If during normal control operation only the
MicroNet Discrete I/O Smart-Plus module’s Fault LED is on or flashing, insure that it is installed in the
correct slot. If it is, then replace that MicroNet Discrete I/O Smart-Plus module. When a module fault is
detected, its outputs should be disabled or de-energized.
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