MC_WriteParameterPersistent

Axis parameters can be written persistently with the function block MC_WriteParameterPersistent.

The persistent parameter to be written is stored in an initialization list. At system startup, the system initially starts with the originally configured values and overwrites these with the persistent data from the initialization list before the start of the task. The initialization list is cleared when a new system configuration is registered. The system then starts with the unchanged data from the new configuration.

	In this case, "axis" refers to the TwinCAT NC axis and its parameters, and not the drive.

Inputs

VAR_INPUT
    Execute         : BOOL;
    ParameterNumber : MC_AxisParameter;
    Value           : LREAL;
END_VAR

Name	Type	Description
Execute	BOOL	The command is executed with a rising edge.
ParameterNumber	MC_AxisParameter	Number of the parameter to be written.
Value	LREAL	LREAL value that is written.

Inputs/outputs

VAR_IN_OUT
    Axis : AXIS_REF;
END_VAR

Name	Type	Description
Axis	AXIS_REF	Axis data structure that unambiguously addresses an axis in the system. Among other parameters it contains the current axis status, including position, velocity or error state.

Outputs

VAR_OUTPUT
    Done    : BOOL;
    Busy    : BOOL;
    Error   : BOOL;
    ErrorID : UDINT;
END_VAR

Name	Type	Description
Done	BOOL	TRUE if the parameters were written successfully.
Busy	BOOL	TRUE as soon as the command is started with "Execute" and as long as the command is processed. If "Busy" is FALSE, the function block is ready for a new order. At the same time, one of the outputs "Done" or "Error" is set.
Error	BOOL	TRUE, if an error occurs.
ErrorID	UDINT	If the error output is set, this parameter supplies the error number.

Requirements

Development environment	Target system type	PLC libraries to include
TwinCAT v3.0.0	PC or CX (x86 or x64)	Tc2_MC2