MC_ReadAxisComponents
The function block can be used to read information about the subelements encoder, drive and controller of an axis.
 | In this case "axis" refers to the TwinCAT NC axis and its parameters, and not the drive. |
Inputs
VAR_INPUT
Execute : BOOL;
END_VAR
Name | Type | Description |
|---|---|---|
Execute | BOOL | The command is executed with a rising edge. |
Inputs/outputs
VAR_IN_OUT
AxisComponents : ST_AxisComponents;
Axis : AXIS_REF;
END_VAR
Name | Type | Description |
|---|---|---|
AxisComponents | Data structure used to return the components (encoders, controllers and drives) of the axis. | |
Axis | 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 components have been read successfully. |
Busy | BOOL | TRUE as soon as the Execute input of the function block has been set to TRUE and component reading has not yet been completed. Afterwards either the output is Done or Error TRUE and Busy is set to FALSE again. |
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 |