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

Block to interrupt the pulse generation when controlling two stepper motors simultaneously.

Ladder Representation

MW_PlcStop2_G0

Block Structure

Variable Type	Name	Data Type	Description
VAR_INPUT	EN	BOOL	Block enabling
VAR_OUTPUT	ENO	BOOL	Output enabling
VAR	MW_PlcStopWithRamp2_INST_0	MW_PlcStopWithRamp2	Instance of access to block structure

Operation

When the EN input changes from FALSE to TRUE (rising edge), the block starts a deceleration ramp for pulse generation for both stepper motors.

The deceleration ramp follows the configuration used in the ramp configuration block (MW_PlcChangeRamp1).

NOTE!

The stepper motor control must be enabled for both axes. Look at the user manual and parameter manual.

Example in Ladder

MW_PlcStop2_example01

When the "start" contact is activated, a PWM signal is generated on the pulse output of axis 1 with an initial frequency of 0 Hz and a duty cycle of 50%. The direction output of axis 1 is set to a low level (considering that the direction has not been inverted via parameters), and a synchronized ramp with axis 2 is performed.

A PWM signal is also generated on the pulse output of axis 2 with an initial frequency of 0 Hz and a duty cycle of 50%. The direction output of axis 2 is set to a high level (considering that the direction has not been inverted via parameters), and a synchronized ramp with axis 1 is performed.

In parallel, the "start" contact starts a 3-second timer which, at the end of the time, will initiate a deceleration ramp for the pulses on both axes, and the move block will be completed, regardless of the number of pulses generated.

Example in ST

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

VAR

start : BOOL := 0;

finished : BOOL;

stopped : BOOL;

pos1 : DINT := 1000000;

pos2 : DINT := 2000000;

MW_PlcMoveRelative2_INST_0 : FB_MW_PlcMoveRelative2;

MW_PlcStopWithRamp2_INST_0 : FB_MW_PlcStopWithRamp2;

TON_INST_0 : FB_TON;

END_VAR

MW_PlcMoveRelative2_INST_0.EN := start;

MW_PlcMoveRelative2_INST_0(

AxisNumber:=1,

Position:=pos);

finished := MW_PlcMoveRelative2_INST_0.DONE;

TON_INST_0.EN := start;

TON_INST_0(PT:=3, TIMEBASE:=1000);

MW_PlcStopWithRamp2_INST_0.EN := TON_INST_0.Q;

MW_PlcStopWithRamp2_INST_0(ENO=>stopped);