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Mtr inertia, Mtr peak cur, Mtr pole cnt – Rockwell Automation 1326 Digital AC Multi-Axis Motion Control System User Manual User Manual

Page 153: Mtr rated cur, Neg cur lim

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Publication 1394-5.0 — May 2000

Configuring Your 1394 Analog Servo System

8-17

[Mtr Inertia]

Inertia of motor attached to drive. Automatically
changed when [Motor Type] is changed (to motor
is inertia + 20% for coupling) (Inertia is defined
as time in milliseconds required to reach 1000
rpm at rated motor current). It is used as input to
the auto tune procedure.

Note: Before making modifications to Mtr Data
parameters, [Motor Type] must be set to "custom
motor".

Parameter Numbers

108, 109, 110, 111

Parameter Group

Mtr Data

Display Units

msec

Parameter Type

Read/Write

Change While Running

Yes

Linkable

No

Minimum Value

0 msec

Maximum Value

500 msec

Default Value

100 msec

[Mtr Peak Cur]

Motor peak current.

Note: Before making modifications to Mtr Data
parameters, [Motor Type] must be set to "custom
motor".

Parameter Numbers

124, 125, 126, 127

Parameter Group

Mtr Data

Display Units

amps

Parameter Type

Read/Write

Change While Running

No

Linkable

No

Minimum Value

0 %

Maximum Value

300 %

Default Value

Rated motor peak current

[Mtr Pole Cnt]

The number of electrical poles on the motor.

Note: Before making modifications to Mtr Data
parameters, [Motor Type] must be set to "custom
motor".

Parameter Numbers

396

Parameter Group

Mtr Data

Display Units

None

Parameter Type

Read/Write

Change While Running

No

Linkable

No

Minimum Value

2

Maximum Value

8

Default Value

This is determined by the motor catalog number.

[Mtr Rated Cur]

Motor nameplate rated current. Automatically
changed when [Motor Type] is changed. This
value will be clamped to the current rating of the
axis module if the motor rating is larger than the
module.

Note: Before making modifications to Mtr Data
parameters, [Motor Type] must be set to "custom
motor".

Parameter Numbers

104, 105, 106, 107

Parameter Group

Mtr Data

Display Units

amps

Parameter Type

Read/Write

Change While Running

No

Linkable

No

Minimum Value

0%

Maximum Value

100%

Default Value

0%

[Neg Cur Lim]

The maximum allowable negative motor current
that can be commanded is specified through this
parameter. If greater than [Bridge Lim], then
[Bridge Lim] will set the limits.
Important: Setting this parameter to a value other
than default will limit motor output torque in CCW
direction.
For Example: If the value equals 100%, the axis
module will not deliver more than 100% to motor,
thus peak torque is limited to 100%.

Parameter Numbers

188, 189, 190, 191

Parameter Group

Torq Data

Display Units

amps

Parameter Type

Read/Write

Change While Running

Yes

Linkable

No

Minimum Value

10% rated motor current

Maximum Value

300% rated motor current or 2 times drive rating
(whichever is less)

Default Value

300% rated motor current

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