Dv (dual velocity (dual loop)), Configuration – Yaskawa SMC–4000 User Manual

Page 103

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SMC–4000 User Manual

DV (Dual Velocity (Dual Loop))

[Configuration]

DESCRIPTION:

The DV function changes the operation of the PID servo loop. It causes the

KD (Derivative Constant)

term

to operate on the dual encoder instead of the main encoder. This results in improved stability in the cases
where there is a backlash between the motor and the main encoder, and where the dual encoder is mounted
on the motor. See the example section.

ARGUMENTS: DV x, y, z, w or DVX=x or DV a, b, c, d

where

x, y z, w, or a, b, c, d are unsigned integers

0 disables the function. 1 enables the dual loop.

USAGE:

OPERAND USAGE:

_DVn contains the state of dual velocity mode where n is an axis letter and 0 = disabled, 1 = enabled.

RELATED COMMANDS:

KD (Derivative Constant)

FV (Velocity Feedforward)

EXAMPLES:

HINT: The DV command is useful in backlash and resonance compensation.

While Moving

Yes

Minimum Value

0

In a Program

Yes

Maximum Value

1

Command Line

Yes

Default Value

0

Can be Interrogated

Yes

Default Format

1

Used as an Operand

Yes

Virtual Axis

No

DV 1

Enables dual loop PID

DV 0

Disables DV

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