MC_Power (FB)

FUNCTION_BLOCK MC_Power

This function block controls the power stage (on or off).

If this function block is called with Enable = TRUE and axis Disabled, it will either lead to StandStill when no error inside the axis or ErrorStop if an error exists. An error indicates that there is a hardware problem with the power stage.

• If power fails (also during operation) block will generate a transition to the state ErrorStop.

• When MC_Power is called with Enable = FALSE the axis goes to state Disabled for every state including ErrorStop.

• It is possible to set an error variable when the Command is TRUE for a while and the Status remains FALSE with a Timer Function Block and an AND Function (with inverted Status input). It indicates that there is a hardware problem with the power stage

Note

Error “NO_FIELD_ACCCESS” can get generated at the output ErrorID even when function block is disabled.

InOut:

Scope	Name	Type	Initial	Comment
Input	Enable	BOOL		Enable continuously on “TRUE”
	EnablePositive	BOOL	TRUE	Enable positive movement direction, FALSE will hold the axis without ramp, an ongoing movement is aborted
	EnableNegative	BOOL	TRUE	Enable negative movement direction, FALSE will hold the axis without stop, an ongoing movement is aborted
Output	Status	BOOL		Axis is ready for operation
	Error	BOOL		Signals that error has occurred within function block
	ErrorID	ERROR_ID		Error identification. For error details refer to Enumeration ERROR_ID
Inout	Axis	Axis_Ref		Reference to axis