Concurrent Technologies VP 110/01 Series, Technical Reference Manual

Page: 22 / 150

2.4 Front Panel Indicators and Controls
When installing or removing the board for the first time, or when checking it’s operation, it can be
very useful to note the behavior of the LEDs on the front panel. Figure 2-2 shows the location of
the LEDs, and their purpose is outlined below.
2.4.1 Run LED (R) Green
The run LED indicates that activity is occurring on the primary internal PCI bus. This allows the
user to quickly assess how active the PCI bus is.
2.4.2 POST LED (P) Yellow
The POST LED is used to indicate that a power on self test has failed. This LED will also flash
when outputting sound on the speaker.
2.4.3 Ethernet Speed LEDs (Speed) Yellow
These LEDs indicate the operating speed of the corresponding front panel Ethernet interfaces,
as follows:
l
Off = 10 Mbits/s.
l
Steady On = 100 Mbits/s.
2.4.4 Link/Activity LEDs (LK/ACT) Green
These LEDs light when connection has been made on the corresponding Ethernet interface.
They will flash to indicate link activity, and during periods of high Ethernet activity the LEDs may
switch off for several seconds.
2.4.5 Battery Status LED (B) Yellow (optional)
This LED lights if the on board battery voltage has fallen below the level required for data
retention and must be replaced.
2.4.6 Reset/NMI Switch
The front panel switch may be configured to generate a local NMI or board reset.
The reset or NMI function is selected by the setting of the Front Panel Reset and NMI Switch DIL
switches shown in Figure 2-3.
2-4 VP 110/01x
Hardware Installation
Ethernet CH1
PMC Site 2 PMC Site 1 Ethernet CH0
Battery (Yellow)
LED
POST (Yellow)
LED
Reset/NMI
Switch
COM1
Run (Green)
LED
External
Reset
Ground
Figure 2-2 Front Panel Indicators and Controls