User manual
LED indicators and troubleshooting | Field-bus coupler
284 1432790000/03/02.2014Manual u-remote
Coupler/indicator LED Status Recommended action
PROFINET IRT field-bus coupler UR20-FBC-PN-IRT
Power LED
PWR Green: Supply voltage
Off and the status LED on the module is green: Defective
coupler
Have coupler repaired or replaced
The internal fuse was triggered due to an overload
Off and the status LED on the module is off: Improper supply
voltage
Check the supply voltage
Collective error
SF Red: Conguration error, or error in the coupler, or error in a
module, or there is a new diagnostic message
Red ashing: Station in Force mode
Check that the GSDML le is up-to-date.
Check if the congured station setup matches the actual
setup
Read the diagnostic message with the web server or an
engineering tool and determine which further actions to take
Bus failure
BF Red: No connection to the eldbus Check the eldbus cable and the PLC conguration
Flashing red: Conguration error, no connection to the
control unit, or error in the parameter set
Check the eldbus parameters and the PLC conguration
Check that the GSD le is up-to-date
Check if the congured station setup matches the actual
setup
Maintenance
MT Yellow: Error on the system bus Check that the modules have been snapped into place
properly
Connection
LINK1 Green: Connection established between port 1 of the coupler
and another eld device
Off: No connection Check the connection to the next participant and the eldbus
cable
Active
ACT1 Flashing yellow: Data being exchanged on port 1
Connection
LINK2 Green: Connection established between port 2 of the coupler
and another eld device
Off: No connection Check the connection to the next participant and the eldbus
cable
Active
ACT2 Flashing yellow: Data being exchanged on port 2
Input supply voltage
3.1 Green: Supply voltage for input circuit >18VDC
3.2 Red: Supply voltage for input circuit <18VDC Check the supply voltage
3.4 Red: Internal fuse defective Replace the coupler
Output supply voltage
4.1 Green: Supply voltage for output circuit >18VDC
4.2 Red: Supply voltage for output circuit <18VDC Check the supply voltage
4.4 Red: Internal fuse defective Replace the coupler