Velocity Offset

Type:

Axis Parameter Register

Address:

RMC75: %MDn.1, where n = 12 + the axis number

RMC150: %MDn.1, where n = 24 + the axis number

RMC200: %MDn.21, where n = 384 + the axis number

System Tag:

_Axis[n].VelOffset, where n is the axis number

How to Find:

Axes Parameters Pane, Setup tab: Primary Control Setup

Data Type:

REAL

Units:

V or mA

Range:

any

Default Value:

0

Description

On velocity input axes, this parameter is used together with the Velocity Scale to calculate the Actual Velocity from the input.

Actual Velocity = Velocity Scale x [(Voltage or Current) + Velocity Offset]

Setting the Velocity Offset

Set the Velocity Offset before setting the Velocity Scale. To set the Velocity Offset parameter, make sure the tachometer is stopped. Then adjust the Velocity offset until the Actual Velocity is zero. For more details, see the Analog Velocity Scaling topic.

Changing this Parameter

Because this parameter affects motion, the axis must be disabled or in Direct Output before writing to this parameter. The Enabled and Direct OutputStatus Bits indicate these states of the axis. When changing this parameter from RMCTools, the software will automatically do this for you. This may cause a halt on the axis, which is expected.

 

See Also

Velocity Scale | Velocity Deadband | Velocity Control | Actual Velocity Filter


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