Selection of the source for the touch probe event

Touch probe sources

• Inverter

  Touch probe of the axis connected via Axis

• External touch probe source

  Touch probe of a Fast-I/O. Definition via input ExternalTPSource

• Digitalsignal

  Determination via input ExternalTPDigIn

• external motion axis

  The touch probe event is detected via the motion_axis assigned at input ExternalTPFromAxis. The position output at FB MC_TouchProbe refers to the Axis_Ref connected to this FB. Thus, for example, a TP event from a drive can be combined with an encoder axis.

Default value = 1

Touch probe channel selection

Only relevant for TouchProbeSource = 1, 2 oder 4

• Touch probe channel 1

• Touch probe channel 2

• Touch probe channel 3 (currently only supported by i950 MotionAxes)

• Touch probe channel 4 (currently only supported by i950 MotionAxes)

Default value = 1

Selection of the Touch-Probe-Signal

Only relevant for TouchProbeSource = 1 or 4

• Digital input

• Zero pulse of the motor encoder

• Zero pulse of the 2nd encoder (currently only supported by i950 MotionAxes)

Default value = 1

Configuration of the edge evaluation

• Positive edge

• Negative edge

• Positive or negative edge (Logic in FB)

• Positive and negative edge (Logic in FB)

  Sequence of the edges not relevant.

• First positive and then negative edge (logic in axis)

• First negative and then positive edge (logic in axis)

Default value = 1

Touch probe mode selection

Single/continuous measurement

• Single measurement

  Execute -edge activates function until Done = TRUE or abort via FB MC_AbortTrigger .

• Continuous measurement

  Execute -edge activates function until abort via FB MC_AbortTrigger

  Note

  On FB MC_TouchProbe no done signal is generated.

  Depending on the type of edge evaluation (TouchProbeEdge) the TP measurement is performed : Positive only, negative only or both edges.

  After the first measurement, an updated measured value can only be detected by comparing the value with the previous measured value. The associated flag ValueStored_PosEdge or ValueStored_NegEdge at the FB is set permanently with the first measured value.

  TouchProbeEdge = 1 .. 3:

  Behavior as described

  TouchProbeEdge = 4:

• Since no Done signal is generated at the FB, this type of edge evaluation behaves like TouchProbeEdge = 3.

TouchProbeEdge = 5:

• The first positive edge is waited for. If a negative edge occurs first, it is hidden. After the occurrence of the first positive edge, both edges are reported.

• TouchProbeEdge = 6:

• The first negative edge is waited for. If a positive edge occurs first, this is hidden. After the occurrence of the first negative edge, both edges are reported.

Default value = 1

Pointer to boolean input

• Alternatively, any boolean signal from the application can be used as source

  MC_TRIGGER_REF.ExternalTPDigIn := ADR(xTPEvent);

Only relevant for TouchProbeSource = 3

Note

Variables declared in the "Module I/O Mapping" cannot be directly connected to the FB MC_Touchprobe must be transferred. The following example shows the correct connection of a digital signal to the FB MC_Touchprobe shown.

reation of global variable list (eg. GVL_HardwareSignals) and declaration of boolean variables (e.g. g_xDI1).

• Enter in I/O mapping of EPM-S202:

  GVL_HardwareSignals.g_xDI1

• Transfer to FB MC_Touchprobe :

• TriggerRef.ExternalTPDigIn:= ADR(GVL_HardwareSignals.g_xDI1);

External touch probe source (eg. Fast-I/O)

Only relevant for TouchProbeSource = 2

Additional dead time compensation [ m s]

Only relevant for TouchProbeSource = 2