Appendix B
Troubleshooting
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National Instruments Corporation
B-5
Standby state indicates the linking device has passed all self tests and is
ready to operate. However, it is not functioning because no active Ethernet
segment is configured.
Operational state indicates the linking device has left standby state because
the necessary network configuration (if any) has occurred.
H1 Network Status LEDs
Each Fieldbus (H1 Network) port on the linking device has an LED to
indicate the functional states of the port. Table B-3 describes each state.
Flashing red
Major recoverable fault
Solid red
Major unrecoverable fault
Table B-3.
Description of Fieldbus Network Status LED States
LED State
Meaning
Off
Fieldbus port is not receiving packets.
Steady green
Fieldbus port is alive as Link Active Scheduler.
Flashing green
Fieldbus port is not alive as Link Active Scheduler.
Flashing red
and green
Fieldbus port is seeing traffic, but is at a default or
visitor address.
Flashing red
Fieldbus port encountered a transient, nonfatal
network error.
Steady red
Fieldbus port encountered fatal network error.
Table B-2.
Interpretation of
FBUS-HSE/H1 LD
Module STATUS LED (Continued)
LED State
Meaning
