TRC-8543 LEDs

The TRC-8543 includes two LEDs to help you monitor hardware and bus status. LED 1 primarily indicates whether the hardware is currently in use. LED 2 primarily indicates the activity information of the connected bus. Each LED can display two colors (red or green), which display in the following four patterns:

Table 5. LED Pattern Definitions
Pattern Meaning
Off No LED illumination
Solid LED fully illuminated
Blink Blinks at a constant rate of several times per second
Activity Blinks in a pseudo-random pattern
Table 6. LED Pattern Indications
Condition/State LED 1 LED 2
Port identification Blinks green Blinks green
NI-XNET catastrophic error Blinks red Blinks red
No open session on hardware Off Off
Open session on hardware, port is properly powered, and hardware is not communicating Solid green Off
Hardware is communicating, and controller is in Error Active state Solid green Activity green (returns to idle/off one second after last TX or RX)
Hardware is communicating, and controller is in Error Passive state Solid green Activity red (returns to idle/off one second after last TX or RX)
Hardware is running, and controller transitioned to bus off Solid green Solid red