3. SIGNALS AND WIRING

3.4.2 Speed control mode

(1)Speed setting

(a)Speed command and speed

The servo motor is run at the speeds set in the parameters or at the speed set in the applied voltage of the analog speed command (VC). A relationship between the analog speed command (VC) applied voltage and the servo motor speed is shown below:

The maximum speed is achieved at 10V. The speed at 10V can be changed using parameter No. 25.

 

Rated speed [r/min]

Speed [r/min]

 

CCW direction

10

 

 

 

0

10

CW direction

VC applied voltage [V]

 

Rated speed

Forward rotation (CCW)

Reverse rotation (CW)

The following table indicates the rotation direction according to forward rotation start (ST1) and reverse rotation start (ST2) combination:

(Note) External input signals

 

Rotation direction

 

ST2

ST1

 

Analog speed command (VC)

 

 

 

Internal speed

Polarity

0V

 

 

 

Polarity

commands

 

 

 

 

 

 

 

 

 

0

0

Stop

Stop

 

 

 

Stop

Stop

(Servo lock)

(Servo lock)

 

(Servo lock)

(Servo lock)

 

 

 

0

1

CCW

Stop

 

 

 

CW

CCW

1

0

CW

(No servo lock)

 

 

 

CCW

CW

1

1

Stop

Stop

 

 

 

Stop

Stop

(Servo lock)

(Servo lock)

 

(Servo lock)

(Servo lock)

 

 

 

Note.0: ST1/ST2-SG off (open) 1: ST1/ST2-SG on (short)

Generally, make connection as shown below:

Servo amplifier

 

 

SP1

 

 

SP2

 

 

SG

 

2k

P15R

2k

VC

 

Japan resistor

LG

SD

RRS10 or equivalent

 

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Image 61
Mitsubishi Electronics MR-J2S- A Speed control mode Speed setting, Generally, make connection as shown below