Checking Out and Troubleshooting Your DeltaV System > Checking Out Your System > Step 3. Checking the LED Indicators on Each Device

DeltaV Fiber Switches LEDs

The following tables describe the LEDs on the Fiber Switches.

Table: Fiber Switches' Power LEDs
LED Correct Operating Condition Fault Indication Possible Cause Corrective Action
Green – Power On Off 1. System power is not supplied to unit. 1. Check supply power and connections.
2. Internal fault. 2. Contact technical support.
Red – Error Off On (continuous) Internal fault. Contact technical support.
Table: Fiber Switches' Twisted Pair Port LEDs
LED Status
Link Act
  • On - Link
  • Blinking - Activity
  • Off - No link. Check the cable connection.
FD COL
  • On - Full Duplex
  • Blinking - Collision
  • Off - Half Duplex
100 10
  • On - 100 MHz
  • Off - 10 MHz
LED Status
Link Act
  • On - Link
  • Blinking - Activity
  • Off - No link.