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Appendix A Troubleshooting
© National Instruments Corporation A-3 NI 1450 Series Compact Vision System User Manual
• Watchdog expired while configured for the system shutdown option
– Determine if the interval between watchdog resets is insufficient
for the processing time. Check the software to determine if it
could monopolize the processor.
• Processor overheat
– Make sure you are operating the NI 1450 in compliance with the
temperature specifications in Appendix B.
Refer to Table 4-4, Rising Edge Trigger, Low Pulse with a Quadrature
Encoder Delay, for more information about fault conditions.
Cannot Drive Isolated Outputs
Verify that you have power connected to Viso and Ciso inputs on the
NI 1450 power connector and that the contact at the screw terminals is
solid. Because these outputs are electrically isolated from the NI 1450
main supply, they require power in addition to the NI 1450 main supply.
Runaway Startup Application
If a runaway startup application causes the NI 1450 to become
unresponsive, power off the NI 1450 and then reboot it with either the NO
APP switch or the SAFE MODE switch in the ON position. Rebooting the
NI 1450 with the NO APP switch enabled prevents any VIs from running
at startup. Rebooting with the SAFE MODE switch enabled starts the
NI 1450 in Safe mode and does not launch the embedded LabVIEW RT
engine. Refer to the DIP Switches section of Chapter 3, LEDs, DIP
Switches, and Connectors, for more information about these DIP switches.
System Displays a Missing Operating System Error at Startup
The NI 1450 was powered on or reset with all DIP switches in the ON
position. Set the DIP switches to the off position, and reset the NI 1450
by pressing the RESET button for at least two seconds.
LED Error Indications
The NI 1450 indicates specific error conditions by flashing the orange
STATUS LED a specific number of times. Table A-1 describes the
STATUS LED flashing sequences and the corresponding error condition.