MLCamInit

Description

Initializes a Cam Pipe Block 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. FunctionA 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. block is automatically called if a Cam Block is added to the Pipe Network, with user-defined settings then entered in the Pipe Blocks Properties screen.

The Cam Pipe Block is used to generate motion profiles of any shape. These profiles are created and initiated separately and the shape is modified with the Cam Editor. With the Editor profiles can be changed graphically or by manually changing values in a numeric table relating input and output values with specific slopes. The Cam Editor software tool provides the capability to visualize, analyze, edit, and smooth profiles.

With the PipeNetwork (PN) Cam block:

• the Cam block’s profile is in reference to the input positions coming into the PN Cam block (Master Absolute)
• the PN Cam block output positions are in reference to PN Cam block’s output position at the end of the last cam cycle (Slave Relative)

Profile switching can be done on the fly, without losing synchronization and without dead time. In addition, the offsets and ratios of Cam Profiles can be changed on the fly. See Cam Profile Switching for more information.

• 
  

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

Arguments

Input

BlockID	Description	ID number of a created Pipe Block
	Data type	DINT
	Range	[-2147483648, 2147483648]
	Unit	n/a
	Default	CAM
ProfileName	Description	Name of the current profile assigned to the cam. It must be a declared profile object
	Data type	STRING
	Range	—
	Unit	n/a
	Default	—
ModuloPosition	Description	Value of the period of the cam output values expressed in user units, for a cyclic system
	Data type	LREAL
	Range	—
	Unit	User unit
	Default	360.0

Output

Default (.Q)	Description	Returns TRUE if the CAM Pipe Block is initialized See more details here
	Data type	BOOL
	Unit	n/a

Return Type

BOOL

Related Functions

MLProfileCreate

MLProfileInit

Example

Structured Text

//Initialize  a Pipe Network block named “CAM” with a profile named “Profile_A”, set the cam modulo position to 360
CAM := MLBlkCreate( 'CAM', 'CAM' );
MLCamInit( CAM, 'Profile_A', 360.0 );

Ladder Diagram

Function Block Diagram

 [Top]