MLTrigInit

 Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Initializes a Trigger object for use in a PLC "Programmable Logic Controller" A Programmable Logic Controller, PLC, or Programmable Controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events program.

Inputs

Input	Data Type	Range	Unit	Default	Description
BlockID	DINT	-2147483648 to 2147483647	N/A	No default	ID number of an initiated Trigger object.
Input_Axis	STRING	No range	N/A	No default	Name of the axis where the Fast Input The inputs are taken into account at each cycle depending on the system periodicity (for example each millisecond). Under certain circumstances this can be insufficient when more accuracy is needed, or if a quick response is required from the system. To fill the gap, a drive may have some Fast Input connections (generally one or two). When an event happens that triggers a Fast Input (e.g. when a sensor sends a rising edge), the detection of a signal occurs faster (which can be 1000 times more accurate than the system periodicity). Then the timestamp associated with this input can be provided to the IPC to take corrective action is located.
InputID	DINT	-2147483648 to 2147483647	N/A	No default	ID number of the Fast Input. InputID INT Range = 0, 1 0 = Touch Probe 1 / Capture Engine 0 1 = Touch Probe 2 / Capture Engine 1
EdgeID	DINT	0, 2	N/A	1 (rising edge A rising edge is the transition of a digital signal from low to high. It is also called positive edge)	The edge to trigger on. 0 = disable the Fast Input. 1 = rising edge. 2 = falling edge.

Outputs

Output	Data Type	Range	Unit	Description
Default (.Q)	BOOL	No range	N/A	Returns TRUE if the function block is executed. See Pipe Network - General Rules for more information.

Remarks

• This function block is automatically called if a Trigger Block is added to the Pipe Network, with user-defined settings entered in the Pipe Blocks Properties screen.
• The Trigger object monitors a selected Fast Input and captures the time of a rising or falling edge event.
  • With the time and pipe position information, the Trigger object extrapolates the axis position when the Fast Input event occurred.
• Parameters to enter include:
  • The name of the Pipe Block.
  • The Axis where the Fast Input is located.
  • The number of the desired Fast Input.
  • Whether to trigger on the rising or falling edge of the input.

• 
  

• Trigger objects are normally created in the Pipe Network using the graphical engine.
  You do not have to add MLTrigInit function blocks to their programs.
  Parameters are entered directly in pop-up windows and the code is automatically added to the current project.

Fast Homing - Inputs

See these topics for more information:

• Fast Homing Example with the Pipe Network Motion Engine Axis Pipe Block
• Fast Homing Example with the PLCopen Motion Engine
• Fast Inputs with Pipe Network Motion
• Pipe Network Registration and Fast Homing
• Registration Position Capture Example with Pipe Network Trigger Block

FBD Language Example

FFLD Language Example

IL Language Example

Not available.

ST Language Example

//Create and Initiate a Trigger Pipe Block named “Trigger” and set it up to receive the trigger signal from Axis1, capture engine 0, and the rising edge of the signal
TRIGGER := MLBlkCreate( 'TRIGGER', 'TRIGGER' );
MLTrigInit( TRIGGER, 'Axis1', 0, 1 );

See Also

• MLAxisRstFastIn
• MLTrigClearFlag
• MLTrigIsTrigged
• MLTrigReadPos