Mitsubishi QJ71C24N User Manual page 82

3 SPECIFICATIONS
Device
Signal description
number
X1A CH1 Global signal
X1B CH2 Global signal
System setting default completion
X1C
ON: Completed
X1D 7 Pre-defined protocol ready
X1E 4 Q series 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
Reference
ON: Output instructed
Section 9.4.12
ON: Ready Section 8.1.5
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 Q series C24 is
stopped while the mode switching (X6/XD) is ON.)
4 The Q series C24 ready indicates whether or not it is possible to access the Q series
C24 from the programmable controller CPU. Use it as an interlock signal for a
sequence program.
5 Restart the programmable controller CPU when the watchdog timer error is turned
on (reset the power and the CPU module).
6 QJ71C24N-R4 cannot be used. (Related to modem function signal.)
• X10 to X16: For system
• Y10 to Y16: Use prohibited
7 Pre-defined protocol ready (X1D) is a signal that turns on when pre-defined
protocol communication becomes ready.
IMPORTANT
(1) Of the input/output signals to the programmable controller CPU, the signals
marked with "Use prohibited" must not be output (ON).
If any of the "Use prohibited" signals is output, the programmable controller
system may malfunction.
(2) When the modem function is not used or the QJ71C24N-R4 is used, X10 to
X16 are used for the system and Y10 to Y16 cannot be used.
Device
section number
Y1A
Y1B
System setting default request
Y1C
ON: Requesting
Y1D
— Y1E
— Y1F
MELSEC-Q
Signal description
Use prohibited
Use prohibited
Reference
section
—
Section 9.4.12
—
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