User manual
LED indicators and troubleshooting | Field-bus coupler
285Manual u-remote1432790000/03/02.2014
Coupler/indicator LED Status Recommended action
EtherCAT field-bus coupler UR20-FBC-EC
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 ESI conguration 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 ESI conguration le is up-to-date
Check if the congured station setup matches the actual
setup
Maintenance
MT Yellow: Error on the system bus or eldbus Check that the modules have been snapped into place
properly
Connection/active
L/AIN Off: No connection Check the eldbus cable
Green: Connection established between port 1 of the coupler
and another eld device
Flashing green: Data being exchanged on port 1
Connection/active
L/A OUT Off: No connection Check the eldbus cable
Green: Connection established between port 2 of the coupler
and another eld device
Flashing green: Data being exchanged on port 2
Coupler state
RUN Off: Coupler in INIT state
Flashing green: Coupler in PRE-OPERATIONAL state
Lights up green briey: Coupler in SAFE OPERATIONAL state
Green: Coupler in OPERATIONAL state
Internal error
ERROR Red: Critical error in the coupler
Red lights up briey: Error in the coupler application
Red lights up briey twice: Output of the sync manager
watchdog out-of-date
Blinking red: Conguration error
Check that the ESI le is up-to-date. Check if the congured
station setup matches the actual setup
Check that the coupler rmware is up-to-date. Compare the
master cycle time with the time set up on watchdog timer
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