BECKHOFF CX2100­00x4 - Manual (Page 37)

Error handling and diagnostics
5.2 LEDs of the power supply unit (CX2100­0xx4) in K­bus
mode
After switching on, the power supply immediately checks the connected Bus Terminal configuration. If K­bus
terminals are detected, the error­free bootup is signaled by the red “I/O ERR LED” going out. If the “I/O ERR”
LED blinks, an error in the area of the terminals is indicated. The error code can be determined from the
frequency and number of blinks. This permits rapid rectification of the error.
Display LED Meaning
Us 24 V Power supply for the CPU module. The LED lights
green if the power supply is correct.
Up 24V Power supply for terminal bus. The LED lights green if
the power supply is correct.
K­BUS
RUN K­bus diagnostics. The green LED lights up in order to
indicate fault­free operation. "Fault­free" means that
the communication with the fieldbus system is also
running.
K­BUS
ERR K­bus diagnostics. The red LED flashes to indicate an
error. The red LED blinks with two different
frequencies.
Table 1: The I/O error LED blink code
fast blinking Start of the error code
First slow sequence Error code
Second slow sequence Error code argument
CX2100­00x4 37 Version 1.0