65
(A) Status indicator LEDs
The status indicators MS and NS ("A" in the figure given on the previous page) can
light or flash in green or red. Each of the ON, flashing, and OFF states of those
indicators shows the module or network status as listed below.
The flashing interval is once per second (0.5 second of ON and 0.5 second of OFF).
LED Name Color Status Status Definition Meaning (Main Errors)
Normal state • The device is working normally.
Green
Setup not completed
• The setting is incorrect and must be
adjusted.
Fatal error • A device hardware error has occurred.
Red
Recoverable error
• An error from which recovery is possible has
occurred.
MS
(Module
Status)
−
No power supplied • Device power is not being supplied.
Communications link
established
• The network is normal (communication has
been established).
Green
Communications link
not established
• The network is normal but communication
with the slaves has not been established.
Fatal communications
error
• Communication is not possible due to an
error such as allocation of the same address
to more than one node, or detection of
Busoff.
Red
Recoverable
communications error
• Communication is not possible due to an
error such as a slave size error.
NS
(Network
Status)
−
Offline
• The online status cannot be established,
e.g. because a CAN send timeout error has
occurred.
:ON :Flashing :OFF
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