Beckhoff CX8080

Error handling and diagnosis
K-bus error code
Error code Error code argument Description Remedy
Persistent, continuous
flashing
EMC problems • Check power supply
for undervoltage or
overvoltage peaks
• Implement EMC
measures
• If a K-bus error is
present, it can be
localized by a restart
of the coupler (by
switching it off and
then on again)
3 pulses 0 K-bus 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 K-Bus data error, break
behind the Bus Coupler
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 K-bus 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 do
not correspond to the
configuration
Check the Bus Terminals
for the configured Bus
Terminals
1..n K-bus reset failed Check the Bus Terminals
CX8080 59Version: 1.0.0