Mitsubishi Electronics QJ71C24/-R2, QJ71C24N, SH-080007 manual 65

3 SPECIFICATIONS

3.8 List of Input/Output Signals for the PLC CPU

MELSEC-Q

This section describes the input/output signals of the Q series C24.

For assignments of the input/output signals shown in the table below, it is assumed that the Q series C24 is mounted in slot 0 of the basic base unit.

Device numbers starting with X indicate input signals from the Q series C24 to the PLC CPU, and device numbers starting with Y indicate output signals from the PLC CPU to the Q series C24.

The following table lists the input/output signals for the PLC CPU.

Device		Signal description		Reference
number				section
X0	1	CH1 Transmission normal completion
		ON: Normal completion		Section 8.6.4
X1	1	CH1 Transmission abnormal completion
				Section 8.6.5
		ON: Abnormal completion
				Section 8.6.6
X2	1	CH1 Transmission processing
		ON: Transmission in progress
X3	2	CH1 Reception data read request		Section 6.1
		ON: Requesting read		Section 7.1
X4	2	CH1 Reception abnormal detection		Section 8.6.5
		ON: Abnormal detection		Section 8.6.6
X5		(For system)		—
X6	3	CH1 Mode switching		Application,
		ON: Switching		Chapter 15
X7	1	CH2 Transmission normal completion
		ON: Normal Completion		Section 8.6.4
X8	1	CH2 Transmission abnormal completion
				Section 8.6.5
		ON: Abnormal completion		Section 8.6.6
X9	1	CH2 Transmission processing
		ON: Transmission in progress
XA	2	CH2 Reception data read request		Section 6.1
		ON: Requesting read		Section 7.1
XB	2	CH2 Reception abnormal detection		Section 8.6.5
		ON: Abnormal detection		Section 8.6.6
XC		(For system)		—
XD	3	CH2 Mode switching		Application,
		ON: Switching		Chapter 15
XE		CH1 ERR. occurrence
		ON: Error occurring		Section 8.6.10
XF		CH2 ERR. occurrence		Section 10.1.2
		ON: Error occurring
X10	6	Modem initialization completion
		ON: Initialization completed
X11	6	Dialing
		ON: Dial in progress
X12	6	Connection
		ON: Connection in progress		Section 8.6.2
X13	6	Initialization/connection abnormal completion
				Application,
		ON: Initialization/ connection abnormally completed		Chapter 3
X14	6	Modem disconnection complete
		ON: Disconnection completed
X15	6	Notification normal completion
		ON: Normal completion
X16	6	Notification abnormal completion
		ON: Abnormal completion
X17	1	Flash ROM read completion	ON: Completed
X18	1	Flash ROM write completion	ON: Completed	—
X19		Flash ROM system setting write completion
		ON: Completed

Device		Signal description		Reference
number				section
Y0		CH1 Transmission request
		ON: Requesting transmission
				—
Y1		CH1 Reception data read completion
		ON: Data read completed
Y2		CH1 Mode switching request		Application,
		ON: Requesting switch		Chapter 15
Y3
Y4		Use prohibited		—
Y5
Y6
Y7		CH2 Transmission request
		ON: Requesting transmission
				—
Y8		CH2 Reception data read completion
		ON: Data read completed
Y9		CH2 Mode switching request		Application,
		ON: Requesting switch		Chapter 15
YA
YB		Use prohibited		—
YC
YD
YE		CH1 ERR.clear request
		ON: Requesting error clear		Section 8.6.10
YF		CH2 ERR. clear request		Section 10.1.2
		ON: Requesting error clear
Y10	6	Modem initialization request (standby request)
		ON: Requesting initialization		Section 8.6.2
	6	Connection request
Y11				Application,
		ON: Requesting connection
				Chapter 3
Y12	6	Modem disconnection request
		ON: Requesting disconnection
Y13		Use prohibited		—
Y14	6	Notification- issued request
		OFF: Requesting notification issuance
Y15
		Use prohibited		—
Y16
Y17		Flash ROM read request	ON: Requesting
Y18		Flash ROM write request	ON: Requesting	—
Y19		Flash ROM system setting write request
		ON: Requesting

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