S5-95U, SINEC L2 Start-Up, Tests, and Diagnostics
Table 3-10 lists the possible error codes.
Table 3-10. Event Parameter Message in Indication Block
Error Code Significance/Cause Remedy
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01
H
Double token (e.g., when two logical rings
have been linked together, or bus cable has
been interrupted)
Temporary error
(repairs itself)
02
H
No bus activity within monitoring time T
to
(ring start-up, or temporary loss of token)
Temporary error
(repairs itself)
03
H
No bus synchronization within
monitoring time T
syni
04
H
L2 processor overload
Temporary error
(repairs itself)
Temporary error (repairs itself)
05
H
06
H
Station is connected, but its HSA is
too low compared to the other
Receive frame problems
Temporary error
(repairs itself)
Temporary error (repairs itself)
42
H
... B1
H
,C0
H
... FF
H
Serious internal error Cannot be done by the user; contact
your nearest Siemens representative
21
H
22
H
23
H
24
H
Transmit frame problems caused by
hardware (module) fault or faulty bus
LAS useless
Station is connected, but there is
another station with the same
Station is not connected yet, its HSA
is too low compared to the other
Replace module eventually
Temporary error (repairs itself)
Temporary error
(repairs itself)
Change HSA in DB1
(must be the same for all stations on
25
H
26
H
27
H
... 30
H
Temporary token loss
Frame error
Protocol error or
protocol monitoring error
Temporary error (repairs itself)
Temporary error (repairs itself)
Check L2 basic parameters in DB1 for
baud rate compatibility
41
H
Station is not connected yet, there is
another station with the same station
number
Change TLN parameter in DB1, switch
PLC OFF and ON
B2
H
Only for active stations:
station was not accepted in the
network within the monitoring time
Check DB1 parameters and hardware
configuration and, if necessary,
change them (TRT must be the same
for all stations on the network, HSA
too low, cable short-circuit etc.) switch
PLC OFF and ON
If temporary errors occur often in your network, check the network configuration. The errors could
be caused by hardware problems on the network, such as faulty cables, bus connectors, etc.
EWA 4NEB 812 6112-02
3-27
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