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Signals and wiring – MITSUBISHI ELECTRIC MELSERVO MR-J2S- A User Manual

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3. SIGNALS AND WIRING

Connector pin No.

Control

mode

Signal

Symbol

7kW or

less

11kW or

more

Functions/Applications

I/O

division

P

S

T

Encoder Z-phase
pulse
(Open collector)

OP

CN1A

14

CN1A

14

Outputs the zero-point signal of the encoder. One pulse is
output per servo motor revolution. OP turns on when the
zero-point position is reached. (Negative logic)
The minimum pulse width is about 400 s. For home
position return using this pulse, set the creep speed to
100r/min. or less.

DO-2

Encoder A-phase
pulse
(Differential line
driver)

LA

LAR

CN1A

6

CN1A

16

CN1A

6

CN1A

16

Encoder B-phase
pulse
(Differential line
driver)

LB

LBR

CN1A

7

CN1A

17

CN1A

7

CN1A

17

Outputs pulses per servo motor revolution set in
parameter No. 27 in the differential line driver system.
In CCW rotation of the servo motor, the encoder B-phase
pulse lags the encoder A-phase pulse by a phase angle of

/2.

The relationships between rotation direction and phase
difference of the A- and B-phase pulses can be changed
using parameter No. 54.

DO-2

Encoder Z-phase
pulse
(Differential line
driver)

LZ

LZR

CN1A

5

CN1A

15

CN1A

5

CN1A

15

The same signal as OP is output in the differential line
driver system.

DO-2

Analog monitor 1

MO1

CN3

4

CN4

1

Used to output the data set in parameter No.17 to across
MO1-LG in terms of voltage. Resolution 10 bits

Analog

output

Analog monitor 2

MO2

CN3

14

CN4

2

Used to output the data set in parameter No.17 to across
MO2-LG in terms of voltage. Resolution 10 bits

Analog

output

(3) Communication

POINT

Refer to Chapter 14 for the communication function.

Control

mode

Signal

Symbol

Connec-

tor pin

No.

Functions/Applications

I/O

division

P

S

T

RS-422 I/F

SDP

SDN

RDP

RDN

CN3

9

CN3

19

CN3

5

CN3

15

RS-422 and RS-232C functions cannot be used together.
Choose either one in parameter No. 16.

RS-422
termination

TRE

CN3

10

Termination resistor connection terminal of RS-422 interface.
When the servo amplifier is the termination axis, connect this
terminal to RDN (CN3-15).

RS-232C I/F

RXD

TXD

CN3

2

CN3

12

RS-422 and RS-232C functions cannot be used together.
Choose either one in parameter No. 16.