Mitsubishi Electric MELSEC-L LD75D, User Manual

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Set the parameters, "[Pr.5] Pulse output mode" and "[Pr.23] Output signal logic selection", in accordance with the
specifications of a connected servo amplifier. If not, the motor may rotate in the opposite direction or may not rotate at all.
Connection examples with a MELSERVO-J3 series servo amplifier are shown below.
●
Open collector connection (LD75P  )
● Differential driver connection (LD75D

)
[Pr.5] Pulse output mode
LD75P 
([Pr.23] Output signal logic selection
(bit0))
Servo amplifier
Logic of MR-J3-

A servo amplifier
CW/CCW
Negative logic Negative logic
Positive logic Positive logic
PULSE/SIGN
Negative logic Negative logic
Positive logic Positive logic
A phase/B phase
Negative logic Negative logic
Negative logic Positive logic
Positive logic Negative logic
Positive logic Positive logic
[Pr.5] Pulse output mode
LD75D 
([Pr.23] Output signal logic selection
(bit0))
Servo amplifier
Logic of MR-J3-  A servo amplifier
CW/CCW
Negative logic Positive logic
Positive logic Negative logic
PULSE/SIGN
Negative logic Positive logic
Positive logic Negative logic
A phase/B phase
Negative logic Negative logic
Negative logic Positive logic
Positive logic Negative logic
Positive logic Positive logic
24VDC
PULSE F
PULSE COM
PULSE R
PULSE COM
OPC
DOCOM
PP
NP
SD
MR-J3- A
servo amplifier
LD75P
PULSE F+
PULSE F-
PULSE R+
PULSE R-
PP
PG
NP
SD
MR-J3- A
servo amplifier
LD75D
NG