Mitsubishi Electronics QJ71C24/-R2, QJ71C24N, SH-080007 manual 28

1 OVERVIEW

MELSEC-Q

MELSEC	Q25HCPU
POWER	MODE
	RUN
	ERR.
	USER
	BAT.
	BOOT

PULL

USB

RS-232

MITSUBISHI

MELSEC	Q25HCPU
POWER	MODE
	RUN
	ERR.
	USER
	BAT.
	BOOT

PULL

USB

RS-232

MITSUBISHI

QJ71C24

QJ71E71

RUN

ERR.

CH1.

CH2.

INIT.

COM.ERR

Command

OPEN

SD

RD

CH1.

10BASE-T

RS-232

CH.2

SDA

Command request data

RDB

6

5

SG

1

SDB

2

(FG)

3

RDA

4

(FG)

RS-422

7

/485

MELSECNET/H

(MELSECNET/H mode)

QJ71C24

QJ71E71

MELSEC

Q25HCPU

QJ71C24

QJ71E71

RUN

ERR.

POWER

MODE

RUN

ERR.

CH1.

CH2.

INIT.

COM.ERR

CH1.

CH2.

INIT.

COM.ERR

OPEN

RUN

OPEN

SD

RD

SD

RD

ERR.

CH1.

10BASE-T

USER

CH1.

10BASE-T

BAT.

RS-232

BOOT

RS-232

CH.2

CH.2

SDA

SDA

SG

2

1

PULL

SG

2

1

SDB

USB

SDB

(FG)

3

(FG)

3

RDA

4

RDA

4

(FG)

5

RS-232

(FG)

5

RDB

6

RDB

6

RS-422

7

MITSUBISHI

RS-422

7

/485

/485

In the MELSECNET/10 mode, other stations (including the A/QnA series PLC CPUs) can be accessed during data link operation.

The MC protocol is equivalent to the communication function using a dedicated protocol that is supported by the A/QnA series computer link module/serial communication modules.

(2) Data communication using the non procedure protocol

(Details are explained in Chapter 6 and the User's Manual (Application).)

(a)Data can be transferred in any message formats that conform to the specifications of external devices (measuring devices, PCs, etc.).

(b)Fixed or variable length messages can be received in accordance with the external device specifications.

• How to receive the variable length data

The external device sends data by adding at the end of the message the end-code data (CR+LF or any one-byte data) that is set for the Q series C24.

• How to receive the fixed length data

The external device sends the amount of data equivalent to the size of the end data that is set for the Q series C24.

MELSEC	Q25HCPU	QJ71E71	ERR.	QJ71C24
POWER	MODE	RUN		CH1.		CH2.
		INIT.	COM.ERR
	RUN	OPEN
		SD	RD
	ERR.				CH1.
	USER	10BASE-T
	BAT.
	BOOT			RS-232
		10BASE		CH.2
				SDA
PULL				SG	2	1
	USB			SDB
				(FG)		3
				RDA	4
				(FG)		5
	RS-232			RDB
		+12V			6
MITSUBISHI		12G		RS-422		7
				/485

Reception data	End
	code

(When receiving variable length data)

(c)ASCII code data can be used for communication using the ASCII-BIN conversion function.

MELSEC	Q25HCPU	QJ71E71		QJ71C24
		RUN	ERR.
POWER	MODE	INIT.	COM.ERR	CH1.	CH2.
	RUN	OPEN
		SD	RD
	ERR.	10BASE-T		CH1.
	USER
	BAT.
	BOOT
				RS-232

QJ71C24 ASCII data

ASCII-BIN

conversion

Binary

		10BASE		CH.2
				SDA
				SG		1
PULL				SDB	2
	USB			(FG)		3
				RDA	4
	RS-232			(FG)		5
		+12V		RDB	6
		12G		RS-422
MITSUBISHI			/485			7

data

Binary

data

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