Mitsubishi Melsec-L Series User Manual page 36

Device
Signal description
number
X1A CH1 Global signal
X1B CH2 Global signal
System setting default completion
X1C
ON: Completed
X1D 6 Predefined protocol ready
X1E 4 C24 ready ON: Accessible
Watchdog timer error (WDT error)
X1F 5 ON : Module error occurred
OFF: Module being normally operated
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Reference
ON: Output instructed MELSEC-Q/L
MELSEC
Communication
ON: Output instructed
Reference
ON: Ready Section 9.4
1 The device does not turn on/off by execution of a dedicated instruction when a
function that corresponds to the input signal is used.
2 The device does turn on/off by execution of a dedicated instruction when a function
that corresponds to the input signal is used (from ON to OFF: Data read completed).
3 The mode switching (X6/XD) turns ON when the following function is executed.
• Mode switching, transmission sequence initialization, reception data clear (by
buffer memory), user frame use enable/disable designation, UINI instruction,
programmable controller CPU information clear
While the mode switching (X6/XD) is ON, do not issue a communication request to
the target interface. (The communication processing of the C24 is stopped while
the mode switching (X6/XD) is ON.)
4 The C24 ready indicates whether or not it is possible to access the C24 from the CPU
module.
Use it as an interlock signal for a sequence program.
5 Restart the CPU module when the watchdog timer error is turned on.
If the error still occurs after restarting, refer to Section 15.3.1 to take corrective
actions.
6 Predefined protocol ready (X1D) is a signal that turns on when predefined protocol
communication becomes ready.
IMPORTANT
(1) Do not use any "use prohibited" signals as an output signal to the CPU
module.
Doing so may cause malfunction of the programmable controller system.
(2) If the modem function is not used, X10 to X16 and Y10 to Y16 cannot be used.
Device
number
Y1A
Protocol
Y1B
Manual
System setting default request
— Y1C
ON: Requesting
Y1D
— Y1E
— Y1F
3 SPECIFICATIONS
Signal description
Use prohibited
Use prohibited
Reference
—
—
—
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