MC_ReadActPos

 Function Block A function block groups an algorithm and a set of private data. It has inputs and outputs. - Reads the actual position of the axis.

Inputs

Input	Data Type	Range	Unit	Default	Description
Enable	BOOL	0, 1	N/A	No default	Request to read the axis's actual position. Keeps continuously reading the actual position every 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 cycle, as long as the Enable remains high.
Axis	AXIS_REF	1, 256	N/A	No default	Name of a declared instance of the AXIS_REF library function. See Axis Name and Number for more information. See AXIS_REF Structure for more information.

Outputs

Output	Data Type	Range	Unit	Description
Valid	BOOL			Indicates the value at the Position output is available.
Busy	BOOL			Indicates this function block is executing.
Error	BOOL			Indicates an invalid input was specified.
ErrorID	INT			Indicates the error if Error output is TRUE. See PLCopen Function Block ErrorIDs for more information.
Position	LREAL		User units	Actual position of the axis.

Remarks

• 
  

• This function or function block returns cached data.
  See Program a Multi-Core Controller for more information.

See Function Blocks - General Rules for more information about how inputs and outputs work.

Figure 6-214: MC_ReadActPos

FBD Language Example

Not available.

FFLD Language Example

IL Language Example

Not available.

ST Language Example

            (* MC_ReadActPos S
            T example *)
Inst_MC_ReadActPos( TRUE, Axis1 );
//Inst_MC_ReadActPos is an instance of MC_ReadActPos function block

ActualPos := Inst_MC_ReadActPos.Position; 
//store Position output into a user defined variable