User manual

13 LEDindicatorsandtroubleshooting | I/O modules
479Manual u-remote1432790000/08/12.2015
Module LED Status Recommended action
Digital relay output modules
UR20-4RO-SSR-255,
UR20-4RO-CO-255
Status LED Red:
– Error in supply voltage at output current path
– Communication error on the system bus
– There is a new diagnostic message
– Check that the module has been snapped into place
properly
– Check the supply voltage
Pulse-width modulation modules
UR20-2PWM-PN-0.5A,
UR20-2PWM-PN-2A
Status LED Red:
– Error in supply voltage at output current path
– Communication error on the system bus
– There is a new diagnostic message
– At least one output overloaded
– Check that the module has been snapped into place
properly
– Check the supply voltage
– Eliminate the overload/short circuit
Analogue input modules
UR20-4AI-UI-16,
UR20-4AI-UI-16-DIAG,
UR20-4AI-UI-16-HD,
UR20-4AI-UI-16-DIAG-HD,
UR20-4AI-UI-12
Status LED Red:
– Error in supply voltage at input current path
– Communication error on the system bus
– There is a new diagnostic message
– Channel error
– Firmware error
– Check that the module has been snapped into place
properly
– Check the supply voltage
– Check channel error
– Check firmware, update firmware as nessecary
Status LED off and all other LEDs red:
Error in the bus coupler power supply
Check the bus coupler supply voltage
Channel LED
1.1 ... 4.1
Red:
– Input signal outside permissible range
– System bus cannot be accessed (e.g. caused by
interruption of the bus coupler power supply)
– Check the input signal
– Check the bus coupler supply voltage
UR20-8AI-I-16-HD,
UR20-8AI-I-16-DIAG-HD
Status LED Red:
– Error in supply voltage at output current path
– Communication error on the system bus
– There is a new diagnostic message
– At least one output overloaded
– Check that the module has been snapped into place
properly
– Check the supply voltage
– Eliminate the overload/short circuit
Channel LED
1.1 ... 8.1
Red:
– Channel error – Check channel error
UR20-8AI-I-PLC-INT
Status LED Red:
– Error in the supply voltage
– Communication error on the system bus
– There is a new diagnostic message
– Channel error
– Error on the supply voltage of the feed-in plug
– Check that the module has been snapped into place
properly
– Check the supply voltage
– Check channel error
– Check supply voltage of feed-in plug
Status LED off and all other LEDs red:
– Error in the bus coupler power supply – Check the bus coupler supply voltage
Channel LED
1.0 ... 1.7
Red:
– Input signal outside permissible range
– System bus cannot be accessed (e.g. caused by
interruption of the bus coupler power supply)
– Check the input signal
– Check the bus coupler supply voltage
4.1 Green: Supply voltage feed-in plug >18V DC
4.2 Red: Error on the supply voltage of the feed-in plug – Check supply voltage of feed-in plug
4.4 Red:
– Fuse for the sensor supply has been triggered – Check the load connected to the sensor supply