TRIGGER_REF

TYPE TRIGGER_REF :
STRUCT
    EncoderID       : UDINT; (* 1..255 *)
    TouchProbe      : E_TouchProbe; (* probe unit definition *)
    SignalSource    : E_SignalSource; (* optional physical signal source used by the probe unit *)
    Edge            : E_SignalEdge; (* rising or falling signal edge *)
    Mode            : E_TouchProbeMode; (* single shot or continous monitoring *)
    PlcEvent        : BOOL; (* PLC trigger signal input when TouchProbe signal source is set to 'PlcEvent' *)
    ModuloPositions : BOOL; (* interpretation of FirstPosition, LastPosition and RecordedPosition as modulo positions when TRUE *)
END_STRUCT
END_TYPE

Name	Data type	Description
EncoderID	UDINT	The ID of an encoder is indicated in the TwinCAT System Manager.
TouchProbe	E_TouchProbe	Defines the latch unit (probe unit) within the encoder hardware used.
SignalSource	E_SignalSource	Optionally defines the signal source, if it can be selected via the controller. In many cases the signal source is permanently configured in the drive and should then be set to the default value "SignalSource_Default".
Edge	E_SignalEdge	Edge defines whether the rising or falling edge of the trigger signal is evaluated.
Mode	E_TouchProbeMode	Specifies the operation mode of the latch unit. In single mode only the first edge is recorded. In continous mode each PLC cycle edge is signaled.
PlcEvent	BOOL	If the signal source "TouchProbe" is set to the type "PlcEvent", a rising edge on these variables triggers the recording of the current axis position. "PlcEvent" is not a real latch function, but depends on the cycle time.
ModuloPositions	BOOL	If the variable "ModuloPositions" is FALSE, the axis position is interpreted in an absolute linear range from -∞ to +∞. The "FirstPosition", "LastPosition" and "RecordedPosition" positions of the function block MC_TouchProbe are then also absolute. If "ModuloPositions" is TRUE, all positions are interpreted modulo in the modulo range of the axis used (e.g. 0..359.9999). At the same time this means that a defined trigger window repeats itself cyclically.

TRIGGER_REF 1:

Requirements

Development environment	Target system type	PLC libraries to include
TwinCAT v3.0.0	PC or CX (x86 or x64)	Tc2_MC2