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Parameters – MITSUBISHI ELECTRIC MR-J2S- CP User Manual

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5. PARAMETERS

Class No. Symbol

Name and Function

Initial
value

Unit

Setting

range

24 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

25 VCO Override

offset

Used to set the offset voltage to analog override.

0 mV 999 to

999

26 TLO Torque

limit

offset

Used to set the offset voltage to analog torque limit (TLA).

0 mV 999 to

999

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. 58 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. 58.
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. 58.
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.

A B-phase output pulses

4096[pulse]

8

131072

4

1

4000 pulse/

rev

1

to

65535

28

TL1

Internal torque limit 1
Used to limit servo motor-torque on the assumption that the maximum torque
is 100%. When 0 is set, torque is not produced.

100 % 0

to

100

29

TL2

Internal torque limit 2
Used to limit servo motor-torque on the assumption that the maximum torque
is 100%. When 0 is set, torque is not produced.
Made valid by switching on the internal torque limit selection (TL2).

100 % 0

to

100

E

xp

ansio

n p

ara

m

et

ers 1

30 *BKC Backlash

compensation

Used to set the backlash compensation made when the command direction is
reversed.
This function compensates for the number of backlash pulses in the opposite
direction to the home position return direction. In the absolute position
detection system, this function compensates for the backlash pulse count in
the direction opposite to the operating direction at power-on.
Note. The setting range differs depending on the software version of servo

amplifiers.
Version A4 or later: 0 to 1600
Version A3 or before: 0 to 1000

0 pulse (Note)

0

to

1600