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Parameters – MITSUBISHI ELECTRIC MELSERVO MR-J2S- A User Manual

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5 - 15

5. PARAMETERS

Class

No.

Symbol

Name and function

Initial
value

Unit

Setting

range

Control

mode

23

FFC

Feed forward gain

Set the feed forward gain. When the setting is 100%, the droop pulses

during operation at constant speed are nearly zero. However, sudden

acceleration/deceleration will increase the overshoot. As a guideline,

when the feed forward gain setting is 100%, set 1s or more as the

acceleration/deceleration time constant up to the rated speed.

0

%

0

to

100

P

24

ZSP

Zero speed

Used to set the output range of the zero speed (ZSP).

50

r/min

0

to

10000

P S T

0

Analog speed command maximum speed

Used to set the speed at the maximum input voltage (10V) of the

analog speed command (VC).

Set "0" to select the rated speed of the servo motor connected.

0

r/min

1

to

50000

S

0

25

VCM

Analog speed limit maximum speed

Used to set the speed at the maximum input voltage (10V) of the

analog speed limit (VLA).

Set "0" to select the rated speed of the servo motor connected.

0

r/min

1

to

50000

T

26

TLC

Analog torque command maximum output

Used to set the output torque at the analog torque command voltage

(TC 8V) of 8V on the assumption that the maximum torque is

100[%]. For example, set 50 to output (maximum torque 50/100) at

the TC of 8V.

100

%

0

to

1000

T

27

*ENR Encoder output pulses

Used to set the encoder pulses (A-phase, B-phase) output by the

servo amplifier.

Set the value 4 times greater than the A-phase or B-phase pulses.

You can use parameter No. 54 to choose the output pulse setting or

output division ratio setting.

The number of A/B-phase pulses actually output is 1/4 times greater

than the preset number of pulses.

The maximum output frequency is 1.3Mpps (after multiplication by

4). Use this parameter within this range.

For output pulse designation

Set " 0 " (initial value) in parameter No. 54.

Set the number of pulses per servo motor revolution.

Output pulse set value [pulses/rev]

At the setting of 5600, for example, the actually output A/B-phase

pulses are as indicated below:

4

5600

A B-phase output pulses

1400[pulse]

For output division ratio setting

Set " 1 " in parameter No. 54.

The number of pulses per servo motor revolution is divided by the

set value.

Output pulse

[pulses/rev]

Resolution per servo motor revolution

Set value

At the setting of 8, for example, the actually output A/B-phase

pulses are as indicated below:

15

Ć

Č

Ć Ć

Ć15Ć

15

Internal torque limit 1

Set this parameter to limit servo motor torque on the assumption

that the maximum torque is 100[%].

When 0 is set, torque is not produced.

(Note)

TL

Torque limit

0

Internal torque limit 1 (Parameter No. 28)

1

Analog torque limit internal torque limit 1

: Analog torque limit

Analog torque limit internal torque limit 1

: Internal torque limit 1

Ex

pan

si

on

par

ame

te

rs

1

28

TL1

Note. 0: off

1: on

When torque is output in analog monitor output, this set value is the

maximum output voltage ( 8V). (Refer to Section 3.4.1, (5))

100

%

0

to

100

P S T