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12 LEDindicatorsandtroubleshooting

75Manual u-control2604080000/03/08.2020

Controller/indicator LED Status Recommended action

UC20-SL2000-EC , UC20-SL2000-EC-CAN

Power LED PWR green: supply voltage present, bootloader/rmware

is running

–

System failure SF red: system bus failure Read off the diagnostic message from the engineering

tool and determine which further actions to take

Bus failure BF red: eld bus failure Check whether modules are mounted correctly

Check if the congured station setup matches the

actual setup

Read off the diagnostic message from the engineering

tool and determine which further actions to take

Maintenance MT yellow: communication error with module –

Controller status RUN green: application running –

greenashing: application stopped Start the application using the engineering tool

yellow: operating system running Wait until the application is running

yellowashing: system update running Wait until update is nished

red: serious system failure –

Connection/active connection 1 L/A X1 off: no connection Check Ethernet cable

green: connection of controller connection 1 with an

additional eld device established

–

green/yellowashing: data being exchanged on

connection 1

–

Connection/active connection 2 L/AX2 off: no connection Check Ethernet cable

green: connection of controller connection 2 with an

additional eld device established

–

greenashing/yellow: data being exchanged on

connection 2

–

Input supply voltage 3.1 green: input current path supply voltage >18VDC –

3.2 red: input current path supply voltage <18VDC Check supply voltage

3.4 red: internal fuse defective Replace the controller

Output supply voltage 4.1 green: output current path supply voltage >18VDC –

4.2 red: output current path supply voltage <18VDC Check supply voltage

4.4 red: internal fuse defective Replace the controller

Weidmüller UC20-SL2000-EC-CAN User Manual

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