Equipments (Devices) > PLC200 > Program > Motion

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_PlcStop2_INST_0	MW_PlcStop2	Instance of access to block structure

Operation

When the EN input changes from FALSE to TRUE (rising edge), the block immediately stops generating pulses for the two stepper motors.

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 at the pulse output of axis 1 with an initial frequency of 0 Hz and duty cycle of 50%. The direction output of axis 1 is set to a low level (considering that the direction was not reversed via parameters), and a synchronized ramp is made with axis 2.

A PWM signal is also generated at 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 refersed via parameters), and a synchronized ramp is made with axis 1.

In parallel, the contact of "start" begins a 3-second counter which, at the end of the time, will cause the PWM signal from both axes to be finished immediately and the move block to 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_PlcStop2_INST_0 : FB_MW_PlcStop2;

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(EN:=3, TIMEBASE:=1000);

MW_PlcStop2_INST_0.EN := TON_INST_0.Q;

MW_PlcStop2_INST_0(ENO=>stopped);