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3 SPECIFICATION
MELSEC-QnA
3.4.2 I/O signal details
The on/off timing, conditions, etc. of I/O signals shown in Table 3.3 are described.
(1) Module error: Xn0
Indicates if the module is normal or not.
Turns ON when a watchdog timer error occurs due to a hardware fault or the like.
When making a reset, reset the programmable controller CPU.
OFF : module normal
ON : module error
Module ready
(XnF)
Module error
(Xn0)