MC_MoveVelocity (FB)

FUNCTION_BLOCK MC_MoveVelocity

This function block causes an endless motion at a specified velocity.

Example

Use of MC_MoveVelocity

The following illustration shows how two instances (First and Second) of the function block MC_MoveVelocity are combined. In the left-hand part of the illustration the Second instance is called after the First instance. If First achieves the specified velocity 3000, then the First output InVelocity is ANDed with the Next signal. This causes Second to move at velocity 2000.

In the right-hand part of the illustration the execution is started by Second´´, as long as the ``InVelocity´´ output of ``First has not yet been set to TRUE and First is still being executed. Although First is still accelerating in order to reach velocity 3000, it is interrupted and aborted because the Test signal starts the execution of Second. Now Second will decelerate the velocity to 2000.

InOut:

Scope	Name	Type	Initial	Comment
Inout	Axis	AXIS_REF_SM3		Reference to axis
Input	Execute	BOOL		TRUE: Starts execution.
	Velocity	LREAL		Maximum velocity Positive in [u/s] Does not need to be achieved.
	Acceleration	LREAL		Acceleration Positive in [u/s²] Increasing motor energy
	Deceleration	LREAL		Deceleration Positive in [u/s²] Decreasing motor energy
	Jerk	LREAL		Is always positive in [u/s³].
	Direction	MC_Direction	current	For modulo-axis
Output	InVelocity	BOOL		TRUE: The set velocity has been reached for the first time.
	Busy	BOOL		TRUE: Function block is in operation.
	CommandAborted	BOOL		TRUE: Execution has been interrupted by another function block instance operating on Axis.
	Error	BOOL		TRUE: Error has occurred.
	ErrorID	SMC_ERROR		Error identification