User manual

13 LEDindicatorsandtroubleshooting| I/O modules
480 1432790000/08/12.2015Manual u-remote
Module LED Status Recommended action
UR20-4AI-TC-DIAG, UR20-4AI-RTD-DIAG
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 the permissible range
– Line break
– Cold-junction compensation error (UR20-4AI-TC-DIAG
only)
– System bus cannot be accessed (e.g. caused by
interruption of the bus coupler power supply)
– Check the input signal, the cabling and, if necessary, the
sensor for external cold-junction compensation.
– Check the bus coupler supply voltage
Analogue output modules
UR20-4AO-UI-16,
UR20-4AO-UI-16-DIAG,
UR20-4AO-UI-16-HD,
UR20-4AO-UI-16-DIAG-HD
Status LED Red:
– Error in the supply voltage
– Communication error
– Channel error
– Check that the module has been snapped into place
properly.
– Check the supply voltage
– Check the channel error
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:
– Overload in voltage mode
– Broken line in current mode
– System bus cannot be accessed (e.g. caused by
interruption of the bus coupler power supply)
– Check the connected load,
– Check the cabling,
– Check the bus coupler supply voltage
Digital counter modules
UR20-1CNT-100-1DO,
UR20-2CNT-100,
UR20-2FCNT-100,
UR20-1CNT-500
Status LED Red:
– Error in supply voltage at input 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
Digital interface modules
UR20-1SSI
Status LED Red:
– Error in supply voltage at input 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
Channel LED
4.1
Green:
– Supply voltage sensor 5VDC
4.3 Green:
– Supply voltage sensor 24VDC