BECKHOFF CX9020 - Manual (Page 40)

Error handling and diagnostics
LEDs for K­bus diagnostics
Error code Error code argu­
ment Description Remedy
Persistent, continuous
flashing EMC problems ­ Check power supply for
overvoltage or undervoltage
peaks
­ Implement EMC measures
If a K­Bus error is present, it
can be localized by a restart of
the power supply (by switching
it off and then on again)
3 pulses 0 K­bus command error ­ No Bus Terminal inserted
­ One of the Bus Terminals is
defective; halve the number of
Bus Terminals attached and
check whether the error is still
present with the remaining Bus
Terminals. Repeat until the
defective Bus Terminal is
located.
4 pulses 0 K­Bus data error, break
behind the power supply Check whether the n+1 Bus
Terminal is correctly connected;
replace if necessary.
n Break behind Bus Terminal
n Check whether the Bus End
Terminal 9010 is connected.
5 pulses n K­bus error in register
communication with Bus
Terminal n Exchange the nth bus terminal
6 pulses 0 Error at initialization Exchange Bus Coupler
1 Internal data error Perform a hardware reset on
the Bus Coupler (switch off and
on again)
8 Internal data error Perform a hardware reset on
the Bus Coupler (switch off and
on again)
7 pulses 0 Process data lengths of the
set and actual
configurations do not
correspond Check configuration and
terminals for consistency
Error code argument
The number of pulses indicates the position of the last Bus Terminal before the fault. Passive Bus Terminals,
such as a power feed terminal, are not included in the count.
In the case of some errors, rectification does not cause the power supply to leave the blink sequence. The
power supply can only be restarted by switching its supply voltage off and on again.
The CX51xx recognizes these terminals automatically on scanning, reads out the terminal types and
automatically places them in the System Manager.
CX9020 40 Version 1.1