SMC_VIRTUAL_AXIS (FB)¶

FUNCTION_BLOCK SMC_VIRTUAL_AXIS

without the need to add a virtual axis device to the “Softmotion general axis pool”.

Use the output variable Axis of type AXIS_REF_VIRTUAL_SM3 instead

of a virtual axis.

Axis is being initialized by once calling this FB with the desired

axis properties (the default values correspond to the virtual axis device description).

Calling this FB again does not have any effect (apart from changing the

input variables): Axis won’t be touched again.

Note that instances of this function block must not be assigned to other instances of the same function block. If you create your own function block containing this function block, it is recommended to add the attribute ‘no_assign’ to your function block as well.

InOut:

Scope	Name	Type	Initial	Comment
Input	wDriveID	WORD	1	Identifier of drive
	iMovementType	SMC_MOVEMENTTYPE	ANY_TO_INT(SMC_AXIS_TYPE.finite)
	motorType	SMC_MOTOR_TYPE
	fPositionPeriod	LREAL	360.0	Length of Period for modulo drives in technical units [u]
	eRampType	SMC_RAMPTYPE	trapez	Velocity ramp
	fSWMaxVelocity	LREAL		Maximum velocity (software limit) in [u/s]
	fSWMaxAcceleration	LREAL		Maximum acceleration (software limit) in [u/s²]
	fSWMaxDeceleration	LREAL		Maximum deceleration (software limit) in [u/s²]
	fSWMaxJerk	LREAL		Maximum jerk (software limit) in [u/s³]
	fSWMaxTorque	LREAL	FPU.GetLRealSpecialVal(FPU.ESpecial_FP_Value.PosInf)	Maximum torque or force (software limit) in [Nu] or [N]
	fSWLimitPositive	LREAL	1000.0	Position limit in positive direction in techn. units [u]
	fSWLimitNegative	LREAL	0.0	Position limit in negative direction in techn. units [u]
	fSWLimitDeceleration	LREAL	0	Deceleration [techn. units/s²] which the system will brake with in case of a software limit.
	bSWLimitEnable	BOOL	FALSE	TRUE: Enables software end switches.
	fSWErrorMaxDistance	LREAL	0	Maximum deceleration distance for ramping down in case of an error [u].
Output	Axis	AXIS_REF_VIRTUAL_SM3
	bError	BOOL