Error handling and diagnostics
CX51x0
78
Version: 2.8
Table 36: K-BUS ERR LED, fault description and troubleshooting.
Error code
Error code argu-
ment
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 power supply
(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 this procedure until
the faulty Bus Terminal has been found.
4 pulses
0
K-bus data error, break
behind the power supply
unit.
Check whether the Bus End Terminal 9010
is connected.
n
Break behind Bus
Terminal n
Check whether Bus Terminal n+1 after the
power supply unit is connected correctly;
replace if necessary.
5 pulses
n
K-bus error in register
communication with Bus
Terminal n.
Replace Bus Terminal at location n.
6 pulses
0
Error at initialization.
Replace Embedded PC.
1
Internal data error.
Hardware reset of the Embedded PC
(switch off and back on again).
8
Internal data error.
Hardware reset of the Embedded PC
(switch off and back on again).
7 pulses
0
Process data lengths of
the set and actual
configurations do not
correspond.
Check the configuration and the Bus
Terminals for consistency.
For some error the LED "K-BUS ERR" does not go out, even if the error was rectified. Switch the power
supply for the power supply unit off and back on again to switch off the LED after the error has been rectified.
