Setting the current position using MC_SetPosition

MC_SetPosition is used to set the current position of the selected axis. This function block will set Origin Fix to On if using absolute position value change.

  • LS_Connect and MC_Power must be executed before this function block can be used.

  • The examples in this topic can be found in the XMC_SingleAxis_FBs.zip downloadable from Example Applications.

Element Name Element Type Description
Execute Input Edge detected request to execute the function block.
Axis Input/Output Axis reference variable. This can not be a constant.
Position Input Specify the current position of the axis.
Relative Input

  • 0 - Absolute Position value change

  • 1 – Relative Position value change
ExecutionMode Input

  • 0 – Immediately apply the position change.

  • 1 – Change position after current command is finished executing.
Done Output Indicates the inputted torque value and current operating torque value are equal.
Busy Output Indicates the function block is currently being executed.
CommandAborted Output Indicates the function block was aborted.
Error Output Indicates whether an error occurs or not.
ErrorID Output Error Identification number

Before executing MC_SetPosition

After executing MC_SetPosition

//Set axis reference

Axis1 := 1;

 

IF (_AX01_RDY) AND (_AX01_SV_ON) THEN

//Example MC_SetPosition fb

INST_SETPOSITION(Execute:=Execute_SetPosition, Axis:=Axis1,

Position:=INST_SETPOSITION.Position,

Relative:=INST_SETPOSITION.Relative,

ExecutionMode:=INST_SETPOSITION.ExecutionMode,

ErrorID=>INST_SETPOSITION.ErrorID);

END_IF;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LM516