MC_PhasingAbsolute (FB)

FUNCTION_BLOCK MC_PhasingAbsolute

This function block performs a movement for the relation to the master axis of the specified axis. A real movement is just performed in case the axis is in synchronized motion.

This function block creates an absolute phase shift in the master position of a slave axis. The master position is shifted in relation to the real physical position. This is analogous to opening a coupling on the master shaft for a moment and is used to delay or advance an axis to its master. The phase shift is seen from the slave. The master does not know that there is a phase shift experienced by the slave. The phase shift remains until another “Phasing” command changes it again.

Note

Phase, Velocity, Acceleration, Deceleration and Jerk of a phase shift are controlled by the function block

Timing example of MC_Phasing

The following graph shows the effect of “Phasing”

Note

To halt this function block user must use MC_HaltPhasing function block instead of MC_Stop or MC_Halt

InOut:

Scope	Name	Type	Comment
Input	Execute	BOOL	Starts the function block at rising edge
	PhaseShift	LREAL	[u] = Technical unit, Absolute phase difference in master
	Velocity	LREAL	[u/s] Value of the maximum velocity (not necessarily reached). Range: >0
	Acceleration	LREAL	[u/s°°2] Value of the acceleration (increasing energy of the motor). Range: >0.If value > 0 and <= 1,Acceleration will be limited to 1.
	Deceleration	LREAL	[u/s°°2] Value of the deceleration (decreasing energy of the motor). Range: >0.If value > 0 and <= 1,Deceleration will be limited to 1.
	Jerk	LREAL	[u/s°°3] Value of the jerk. Range: >=0
	BufferMode	MC_BufferMode	Not supported, default mcABORTING used
Output	Done	BOOL	Shows the status of the function block. Done = TRUE if the execution is finished
	Busy	BOOL	The function block is not finished
	Active	BOOL	Indicates that the function block has control on the axis
	CommandAborted	BOOL	Command is aborted by another command from other PLCopen function block
	Error	BOOL	Signals that error has occurred within function block
	ErrorID	ERROR_ID	Error identification. For error details refer to Enumeration ERROR_ID
	AbsolutePhaseShift	LREAL	[u] Actual phase shift of master axis to slave axis, valid while function block is busy
Inout	Axis	Axis_Ref	Reference to axis