Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 124
Table 9-7. LED Indications of Failure
Number of
LED Flashes
Failure Number of
LED Flashes
Failure
1 Watchdog/MFT Lost Failure 11 Software Failure
2 No Application 12 Power Supply Failure
3 Flash Memory Failure 13 Configuration or Parameter Error
4 Exception Failure 15 Parallel to Serial Bus Error
5 FPGA Failure 16 AI ADC Error
6 Non-Volatile Memory Error 17 AO Readback ADC Error
7 Kernel Watchdog Error 19 Speed Error
8 MFT Timing Failure 20 AI ADC Timeout
9 Software Slip 21 AO Readback ADC Timeout
10 RAM Memory Failure 22 AO DAC Timeout
Detailed fault description for active flash code can be obtained in AppManager.
Fault Detection (I/O)
In addition to detecting the Speed/Analog IO Combo Smart-Plus Module hardware faults, the application
software may detect I/O faults.
Analog Input Faults: The application software may be set with a high and low latch set point to detect
input faults.
Analog Output Driver Faults: The module monitors the source and return currents 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.
The CPU also tells this module in which rate group each channel is to run, as well as special information.
At run time, the CPU then periodically broadcasts a "key" to all I/O cards, telling them which rate groups
are to be updated at that time. Through this initialization/key broadcast system, each I/O module handles
its own rate-group scheduling with minimal CPU intervention.
Troubleshooting Guide
If during normal control operation, all of the modules have Fault LEDs on, check the chassis’ CPU module
for a failure.
If during normal control operation only the Speed/Analog IO Combo 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 module. See instructions
for replacement in Chapter 15, Installation (System Level Installation). When a module fault is detected,
its outputs will be disabled or de-energized.
MPUs
If a magnetic pickup input is not functioning properly, verify the following:
1. Check that the cable is shielded and the shield is properly grounded per the Shields and Grounding
section in Chapter 15, Installation.
2. Measure the input voltage on the terminal block. It should be in the range of 1-25 VRMS.
3. Verify that the signal waveform is clean and void of double zero crossings.
4. Verify that no ground connection exists and that the resulting 60 Hz signal is absent.
5. Measure the frequency. It should be in the range of 50 Hz - 25 kHz.
6. Check the wiring. Look for a loose connection at the terminal blocks and disconnected or
misconnected cables.
7. Check the software configuration to ensure that the input is configured properly.
8. If the readings are incorrect on several channels of the module, replace the Speed module.
To Next Page
Loading...
