National Instruments NI PXIe-6672 - Manual (Page 17)

Chapter 3 Hardware Overview
NI PXIe-6672 User Manual 3-4 ni.com
Access LED
The Access LED indicates the communication status of the NI PXIe-6672.
Refer to Figure 3-2 for the location of the Access LED.
Table 3-1 summarizes what the Access LED colors represent.
Active LED
The Active LED can indicate an error or phase-locked loop (PLL) activity.
You can change the Active LED to amber, unless an error overrides the
selection. Refer to Figure 3-2 for the location of the Active LED.
Tip Changing the Active LED color to amber is helpful when you want to identify devices
in a multichassis situation or when you want an indication that your application has
reached a predetermined section of the code.
Table 3-2 illustrates the meaning of each Active LED color.
Note A red Active LED can indicate that either PXI_CLK10 has stopped or that there is
a PLL error.
Table 3-1. Access LED Color Indication
Color Status
Off Module is not yet functional.
Green Driver has initialized the module.
Amber Module is being accessed. The Access LED
flashes amber for 50 ms when the module is
accessed.
Table 3-2. Active LED Color Quick Reference Table
Color
PXI_CLK10
Stopped
PLL
Error
User
Setting
PLL
Active
Red Yes Yes — —
Amber No No Yes —
Green No No No Yes
Off No No No No