8.5 LED Indication in the Event of Module Down
LED
RUN
PER
LNK
OFF
Blink
OFF
OFF
OFF
OFF
OFF
OFF
Blink
OFF
OFF
Blink
OFF
OFF
OFF
OFF
OFF
OFF
Table 8-1 LED display when FL654 is down
LNT
I/O
(i) Format error
OFF
(ii) Parameter save failure
(iii) FL-network entry failure
(i) Failure of Ethernet setting (operation setting switch bits 1 and 2)
Blink
OFF
(ii) LAN controller failure detection
(i) Node number setting error
OFF
OFF
(ii) Detection of an duplicated node number
Blink
OFF
(i) Protocol version disagreement
(i) Failure of I/O configuration information setting (operation setting
switch bits 3 and 4)
(ii) I/O configuration information abnormality
Blink
(iii) I/O configuration information not saved
(iv) Failure to save I/O configuration information (detection of a
problem in nonvolatile memory)
(v) Cyclic area allocation error
(i) External WDT error
(ii) Bus stall
(iii) SRAM access error
(iv) Occurrence of general exception
OFF
(v) ROM area check failure
(vi) RAM area check failure
(vii) Program area check failure
(viii) Wrong module type
(ix) Incorrect hardware revision
8.5 LED Indication in the Event of Module Down
Status
○ : ON ● : OFF
: Blinking -: Undefined
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