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Model time constant – Delta RMC151 User Manual

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RMC70/150 and RMCTools User Manual

RMC70 Address: %MDn.161, where n = 12 + the axis number

RMC150

Address:

%MDn.161, where n = 24 + the axis number

System Tag: _Axis[n].PFModelGain, where n is the axis number

How to Find: Axes Parameters Pane, All tab: Secondary Feedback →

Filtering/Modeling

Data Type: REAL

Units: (Pr/s)/V or (Fr/s)/V

Default Value: 1

Description

This parameter specifies the gain of the pressure or force model. This parameter is valid

for models with a Model Order of 0, 1, or 2. This parameter is valid only for pressure or

force axes. For more details, see the modeling topic.

9.2.2.2.20.13. Model Time Constant

Type: Axis Parameter Register

RMC70 Address: Position: %MDn.152, where n = 12 + the axis number

Pressure/Force: %MDn.162, where n = 12 + the axis number

RMC150

Address:

Position: %MDn.152, where n = 24 + the axis number
Pressure/Force: %MDn.162, where n = 24 + the axis number

System Tag: Position: _Axis[n].ModTimeConst, where n is the axis number

Pressure/Force: _Axis[n].PFModelTimeConst, where n is the axis

number

How to Find: Axes Parameters Pane, All tab: Feedback → Filtering/Modeling

Axes Parameters Pane, All tab: Secondary Feedback →

Filtering/Modeling

Data Type: REAL

Units: seconds

Range: See the Range section below.

Default Value: 20

Description

This parameter specifies the Time Constant of the model. The Time Constant is only valid

for models with a Model Order of one (1). Separate models exist for position and for

pressure or force feedback. For more details, see the modeling topic.

Changing this Parameter

On position axes, always change this parameter only from Axis Tools for best results. If

the position feedback model is being used, it will be suspended until the last position

feedback model parameter register has been updated (Time Constant [Fx:152] for first

order or Damping Factor [Fx:153] for second order). At this point, the new feedback

model will be calculated and the model will be activated.
Certain position model parameter settings may result in an invalid model. If this occurs,

change your settings. See the modeling topic for more details.

Range

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