MC_ReadParameter (motion control read parameter)

The MC_ReadParameter instruction returns the value of a vendor specific parameter in a Real data type.

Languages supported: Function block diagram, ladder diagram, structured text.

This instruction applies to the L50E and L70E controllers that support motion control.

MC_ReadParameter parameters
Parameter	Parameter Type	Data Type	Description
EN	Input	BOOL	Instruction block enable. TRUE: Execute current MC_ReadParameter computation. FALSE: The Value output is reset to 0. Applies only to ladder diagram programs.
AxisIn	Input	AXIS_REF FB_AXIS_REF	Use the AXIS_REF data type to define AxisIn. For FB_Axis (feedback axis), use the FB_AXIS_REF data type to define AxisIn.
Enable	Input	BOOL	TRUE: Get the value of the parameter number continuously. FALSE: The Value output is reset to 0.
ParameterNumber	Input	DINT	Parameter identification. Parameter numbers definitions are defined in motion control function block parameter numbers.
ENO	Output	BOOL	Enable output. Applies only to ladder diagram programs.
Axis	Output	AXIS_REF	Axis output is read-only in ladder diagram programs.
Valid	Output	BOOL	TRUE: Valid outputs are available. FALSE: Valid outputs are unavailable.
Busy	Output	BOOL	TRUE: The function block is working and new output values are expected. FALSE: The function block is idle.
Error	Output	BOOL	Indicates an error occurred. TRUE: An error is detected. FALSE: No error.
ErrorID	Output	UINT	A unique numeric that identifies the error. The errors for this instruction are defined in Motion control function block error IDs.
Value	Output	REAL	Value of the specified parameter in the data type, as specified by the vendor.

MC_ReadParameter examples

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