Mitsubishi Electronics QD75D Signal name Abbreviation Pin No Function and application, ABS bit

12 CONTROL SUB FUNCTIONS

MELSEC-Q

(3)Connection example

The following diagram shows the example of connection between the PLC system and the Mitsubishi Electric servo amplifier (MR-H-A).

<Servo amplifier>			<PLC system>
MR-H-A			QCPU
			QD75
24(PF)	ABS bit0	0(X47)
			16 points input module
	ABS bit1
23(ZSP)		1(X48)
	Transmission data preparation completed
25(TLC)		2(X49)
	Servo ON
12(SON)		0(Y50)
			16 points output module
44(DI3)	ABS transmission mode	1(Y51)
	ABS request
45(DI4)		2(Y52)

: The X and Y devices can be set arbitrarily with the sequence program.

Details of servo amplifier connector pins

The following table shows the pins for setting the "absolute position detection system". Refer to the MR-H operation manual for the details when the ABS transmission mode is turned OFF.

Signal name	Abbreviation	Pin No.	Function and application
ABS transmission			ABS transmission mode terminal. While this is turned ON,
	DI3	44	the servo amplifier is in the ABS transmission mode, and
mode
			the DI4/PF/ZSP/TLC functions are as shown in this table.
ABS request	DI4	45	This is turned ON when ABS data is requested in the ABS
			transmission mode.
			This indicates the lower order bit among 2 bits of ABS data
ABS bit 0	PF	24	to be transferred from the servo amplifier to the PLC system
			in the ABS transmission mode.
			This indicates the upper order bit among 2 bits of ABS data
ABS bit 1	ZSP	23	to be transferred from the servo amplifier to the PLC system
			in the ABS transmission mode.
Transmission data			This indicates the transmission data preparation completed
preparation	TLC	25	in the ABS transfer mode. When the preparation is
completed			completed, the signal is turned ON.

Refer to the MR-H operation manual for the I/O interface.

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