MC_MachRegist

PLCopen motion icon

 Function Block- Enables Mark-to-Machine registration.

Inputs

Input

Data Type

Range

Unit

Default

Description

En

BOOL

FALSE, TRUE

N/A

No default

On the rising edge, request to enable registration.

Axis

AXIS_REF

The range of .AXIS_NUM is [1, 256]

N/A

N/A

Axis whose position is used to determine a good mark.

TriggerInput

TRIGGER_REF

No range

N/A

No default

Structure specifying the fast input.

The structure elements are:

DirectionINT

Range = 1, 5.

  • 1 = Rising edge.
  • 2 = Falling edge.
  • 3 = N/A
  • 4 = Toggle between both, falling edge first.
  • 5 = Toggle between both, rising edge first.

InputID INT

Range = 0 to 1

  • 0 = Touch Probe 1 / Capture Engine 0
  • 1 = Touch Probe 2 / Capture Engine 1

TrigIDINT

Range = 0 to 256.

  • The axis number of the fast input.
  • 0 (zero) indicates this trigger axis is to be the same as the Axis input.

  • TrigMode INT (TriggerInput.TrigMode) is not presently supported by this function.

Distance

LREAL

  • When converted to feedback units, the range is [-251, 251-1].
  • This value must have the same sign as Ignore.

User units

N/A

  • This is the expected distance between good marks.
  • Along with Tolerance and Ignore, this value is used to determine if the mark detected by the fast input is a good mark.

Tolerance

LREAL

When converted to feedback units,
the range is [0 , 251-1].

User units

N/A

This value specifies the distance, plus or minus, about Distance to determine if the mark detected by the fast input is a good mark.

Ignore

LREAL

  • When converted to feedback units, the range is [-251, 251-1].
  • This value must have the same sign as Distance.

User units

N/A

This value specifies the distance after the previous good mark in which any detected marks are ignored.

Target

LREAL

When converted to feedback units,
the range is:

  • [-251,251-1] if PosAxis' rollover value is zero.
  • [0, PosAxis' Rollover Value] if PosAxis' rollover value is non-zero (i.e., ≥ 0 < PosAxis' Rollover Value).

User units

N/A

  • This is the target position.
  • This position is compared to the actual position captured by the fast input to determine the amount of registration compensation to apply.

Position

LREAL

When converted to feedback units,
the range is:

  • [-251,251-1] if PosAxis' rollover value is zero.
  • [0, PosAxis' Rollover Value] if PosAxis' rollover value is non-zero (i.e., ≥ 0 < PosAxis' Rollover Value).

User units

N/A

  • The position the axis is set to when a good registration mark occurs.
  • If the Inhibit Reference on Good Mark option is specified for the Option argument, this argument is not used.
    • The position of the axis is not changed when a registration mark is encountered.

PosAxis

AXIS_REF

The range of .AXIS_NUM is [1, 256]

N/A

N/A

The position of this axis at the time the fast input occurs is compared to the Target position.

This comparison determines the amount of registration compensation to apply.

CompAxis

AXIS_REF

The range of .AXIS_NUM is [1, 256]

N/A

N/A

The calculated registration compensation is applied to this axis.

PosTolerance

LREAL

When converted to feedback units, the range is [-251, 251-1].

User units

N/A

This value specifies the distance, plus or minus, about the Target position to determine if the position is accepted and the compensation value is calculated and applied.

RatioNumerator

DINT

When converted to feedback units,
the range is [1, 4294967295].

User units

N/A

  • This value is typically the number of User Units of CompAxis motion for one product cycle.
  • This value is used with RatioDenominator to create a conversion factor for calculating the compensation value when PosAxis and CompAxis are different axes.

RatioDenominator

DINT

When converted to feedback units,
the range is [1, 4294967295].

User units

N/A

  • This value is typically the number of User Units of PosAxis motion for one product cycle.
  • This value is used with RatioNumerator to create a conversion factor for calculating the compensation value when PosAxis and CompAxis are different axes.

Options

UINT

See the MC_MachRegist Options Table.

N/A

N/A

  • Each bit enables / disables an option.
  • The MC_MachRegist Options Table defines the bits.
  • Any bits not defined are reserved.
  • The third bit, 0004H, must be 0 (zero).

Outputs

Output

Data Type

Range

Unit

Description

RegistOn

BOOL

FALSE, TRUE

N/A

Indicates registration is activated.

Aborted

BOOL

FALSE, TRUE

N/A

Indicates registration has been terminated by MC_StopRegist.

Error

BOOL

FALSE, TRUE

N/A

Indicates an invalid input was specified or the registration was terminated due to an error.

ErrorID

INT

No range

N/A

Remarks

  • It is used on any servo or digitizing axis and with any move type.
  • It is used most frequently in master/slave applications.

Used with ...

Effect

Non-slave moves

Resets the axis position when a good mark is captured by the fast input.

Slave moves

Applies a compensation offset to correct for the difference between the target position and the measured position.

This provides the ability to compensate for product or process inconsistencies, provides a system that remains synchronized with no accumulated error, and maintains repeatable accuracy throughout the process.

Transition and Registration

  • A positive transition of the En input starts registration.
    • The application may change the registration parameters while registration is active by changing the input values and causing another positive transition of the En input.
    • The function block then reads and applies the new values.
  • The axis number at the Axis input indicates the axis whose position, at the fast input, is used to determine if the mark is a good mark.

Distance, Tolerance, Ignore, Target Inputs

Position and Option Inputs

Figure 1: MC_MachRegist

MC_MachRegist Options Table

Hexadecimal

Decimal

Option

Description

0001 H

1

Absolute/Resetting

0 = Resetting, 1 = Absolute

0002 H

2

Reserved

0

0004 H

4

Time/position based capture

0 = time based capture, 1 = position based capture

0008 H

8

Inhibit Reference on Good Mark

0 = Perform reference, 1 = inhibit reference

When this bit is set, the Position function block argument is unused and the axis position is not changed when a registration mark is encountered.

0010H

16

Inhibit Master Compensation

0 = Perform Master Compensation, 1 = Inhibit Master Compensation

0020H

32

Inhibit Slave Compensation

0 = Perform Slave Compensation, 1 = Inhibit Slave Compensation.


  • To use Capture Engine 1, modify the input PDOs that are used and add the Latch Position 1 parameter.

FBD Language Example

FFLD Language Example

IL Language Example

Not available.

ST Language Example

Inst_MC_MachRegist( ActivateReg, Axist2, Trig1, 360, 5, 90, 180, 0, Axis2, Axis2, 10, 1, 1, 0 );

See Also