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National Instruments Corporation
B-1
VXI/VMEpc 600 Series User Manual
B
LED Indicators
This appendix describes how to read the LEDs on the front panel to
interpret the status of the VXI/VMEpc 600 Series.
VXIbus Interface Status LEDs
The VXIbus interface status LEDs are located at the top of the module
and include four LEDs: FAIL, SYSF, ONLINE, and TEST. They indicate
the various stages of initialization that occur as the VXI/VMEpc 600 Series
boots. The following paragraphs describe each LED.
SYSF LED
The SYSF LED is lit when the VXI/VMEbus SYSFAIL signal is asserted.
It does not necessarily indicate that the VXI/VMEpc 600 Series is asserting
SYSFAIL, only that there is a device in the system asserting SYSFAIL.
FAIL LED
The FAIL LED is lit when the VXI/VMEpc 600 Series is driving the
SYSFAIL signal. The VXI/VMEpc 600 Series asserts SYSFAIL when the
PASSED bit in its VXIbus status register is clear. The PASSED bit is set by
the power-on self configuration circuitry (POSC) when it has completed
initializing the VXI/VMEbus interface.
ONLINE LED
The ONLINE LED is lit when the Resource Manager has successfully
completed and the VXI/VMEbus interface is ready for application
programs.
TEST LED
The TEST LED is lit when the power-on self configuration circuitry is
configuring the VXI/VMEbus interface.