Mitsubishi Electric MELSEC-L LD75P User Manual page 74

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)
[Pr.5] Pulse output mode
CW/CCW
PULSE/SIGN
A phase/B phase
● Differential driver connection (LD75D)
[Pr.5] Pulse output mode
CW/CCW
PULSE/SIGN
A phase/B phase
72
24VDC
LD75P
PULSE F
PULSE COM
PULSE R
PULSE COM
LD75P
([Pr.23] Output signal logic selection
(bit0))
Negative logic
Positive logic
Negative logic
Positive logic
Negative logic
Negative logic
Positive logic
Positive logic
LD75D
PULSE F+
PULSE F-
PULSE R+
PULSE R-
LD75D
([Pr.23] Output signal logic selection
(bit0))
Negative logic
Positive logic
Negative logic
Positive logic
Negative logic
Negative logic
Positive logic
Positive logic
MR-J3- A
servo amplifier
OPC
DOCOM
PP
NP
SD
Servo amplifier
Logic of MR-J3-A servo amplifier
Negative logic
Positive logic
Negative logic
Positive logic
Negative logic
Positive logic
Negative logic
Positive logic
MR-J3- A
servo amplifier
PP
PG
NP
NG
SD
Servo amplifier
Logic of MR-J3-A servo amplifier
Positive logic
Negative logic
Positive logic
Negative logic
Negative logic
Positive logic
Negative logic
Positive logic