Error handling and diagnostics
CX50x0 73Version: 1.9
LEDs for K-bus 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 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 until the defective Bus
Terminal is located.
4 pulses 0 K-Bus data error, break
behind the power supply
Check whether the Bus End Terminal 9010
is connected.
n Break behind Bus
Terminal n
Check whether the Bus Terminal n+1 is
correctly connected; replace if necessary.
5 pulses n K-bus error in register
communication with Bus
Terminal n
Exchange the Bus Terminal on position n.
6 pulses 0 Error at initialization Exchange Embedded-PC.
1 Internal data error Perform a hardware reset on the
Embedded-PC (switch off and on again).
8 Internal data error Perform a hardware reset on the
Embedded-PC (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 CX unit recognizes these terminals automatically on scanning, reads out the terminal types and
automatically places them in the System Manager.
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