Equipments (Devices) > PLC200 > Program > Motion - Stepper Motor > MW

Block to read the current position of the axis.

Ladder Representation

Block Structure

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Block enabling
VAR_INPUT	AxisNumber	CONST	Selected axis
VAR_OUTPUT	ENO	BOOL	Output enabling
VAR_OUTPUT	Position	DINT	Current position
VAR	MW_PlcGetPosition1_INST_0	MW_PlcGetPosition1	Instance of access to block structure

Operation

When the EN input is TRUE, the block reads the current position of the axis and saves it in the variable "Position".

NOTE!

Stepper motor control must be enabled for the selected axis. Look at the user manual and parameter manual.

Example in Ladder

MW_PlcGetPosition1_example01

In the example above the contact "read" enables reading of the current position of axis 1. While "read" is TRUE, the variable "pos" will be updated with the value of the current axis position.

Example in ST

The example below displays instructions for applying the example above in ST language.

VAR

enable : BOOL := 1 ;

done : BOOL;

pos : DINT := 0 ;

END_VAR

done := FB_MW_PlcGetPosition1(

EN:=enable,

AxisNumber:=1 ,

Position=>pos);