6F8C0904 183
8.1 LED Display
8
Table 8-2 Module Down States Indicated by RUN/STBY LED Combinations
LED combination
displayed
Description
RUN On, STBY On Module operating normally in standby mode (parameter setup waiting
state)
The module goes to this state after power is first applied and after a
reset.
RUN On, STBY Off Module operating normally in run mode (transmission possible)
The module switches to this mode in response to an operating mode
control request. (Parameter setup is required to switch the module to
run mode.)
RUN Off, STBY Blinking An error occurred during operation and the module is down.
Possible causes of the module going down Down information
error code
Watchdog timeout occurred 0010H
Memory bus stall occurred 0020H
Trap occurred 0030H
Jabbering timeout occurred 0040H
RUN Off, STBY Blinking Semaphore acquisition error 0500H, 0501H
Semaphore acquisition error 0502H, 0503H
MBX reception error 0504H
MBX transmission error 0505H
No empty TCP resend queue 0506H
Acquired buffer was in use 0507H
Initial buffer acquisition error 0508H
RUN Off, STBY Off Down mode due to the occurrence of an error during self-diagnostics
at power on.
Possible causes of the module going down Down information
error code
LAN controller check error 0050H
ROM BCC check found a discrepancy 0160H
System RAM area check error 0260H
S controller interface memory check error 0360H
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