Leds On The Niu - GE VersaPoint IC220PBI002 User Manual

2

LEDS on the NIU

The diagnostic LEDs on the NIU indicate the type and location of errors.
The module is functioning correctly if all of the green LEDs are on.
Once errors have been removed, the indicators immediately display the current
status.
NIU LED
UM
US
BF
FS
FN
Diagnostics
The NIU provides the following standard Profibus and device-related diagnostics.
Error Type
1
2
3
4
5
6
7
2-10 VersaPoint™ I/O System Profibus-DP NIU User's Manual – August 2005
Color Meaning
Green On = supply voltage in the main circuit for the NIU,
communications power and interfaces present. Off = main
circuit supply not present.
Green On = 24 V segment circuit supply present
Red On = No communication on Profibus. Off = no error.
Flashing = PLC stopped, outputs default to safe values.
Red Defines the function of the FN LED:
FS ON: FN indicates the type of error.
FS OFF: FN indicates the error number
Red Off = no error. If flashing, the number of pulses indicates
the type of error or the error number, depending on
whether FS is on or not
Meaning
Parameter error on Profibus (SET_PRM telegram)
Configuration error on Profibus (CHK_CFG telegram)
Configuration error in the station
Error within the station
Module error
Parameter error on local bus
EEPROM error
GFK-1911B