MCV_ChgParamSet
Change parameter set
This function block can switch the axis parameter set. The activating parameter set must be present and selected by assigning the “NCParamSetIDIn” input.
For example, this function is used for a tool change to inform the motion controller of the changed tool dimensions.
Attention
During the parameter set change, the axis must be at standstill and motion commands must not have been or must not be started for the axis. The axis must not be moved again until all parameters of the new parameter set have been read in and have taken effect in the controller ("valid" = TRUE).
Attention
The controller's behaviour may change when the parameter set is changes. This may modify or deactivate functions critical to safety.
Blockdiagramm
Parameters of the FB
|
VAR_IN_OUT | ||
Variable name | Data type | Description |
axis | AXIS_REF | Axis reference |
|
VAR_INPUT | ||
Variable name | Data type | Description |
Execute | BOOL | The parameter set is changed on the rising edge. |
NcListTypeIn | STRING | Identifier for parameter or list type |
NcParamSetIDIn | UINT | Number of the parameter set to be changed. The value 0 for the parameter set ID indicates the default parameter set which is interpreted and activated at motion controller start-up. Value range [0 … 10] |
|
VAR_OUTPUT | ||
Variable name | Data type | Description |
Valid | BOOL | Is TRUE when the change in parameter set was successful. |
Busy | BOOL | Is TRUE when the FB is still active. |
NCListTypeOut | STRING | Identifier for parameter or list type |
NCParamSetIDOut | UINT | Number of the parameter set to which the change was/should be made. |
NCParamConsistent | BOOL | Is FALSE the parameters were not successfully adopted during a change of parameter set in the ISG-MCP. |
NCWarning | BOOL | Is TRUE if a warning occurs in the ISG-MCP. |
NCError | BOOL | Is TRUE if an error occurs in the ISG-MCP during a change in parameter set. |
NCErrorCode | UDINT | Error code of the error or warning occurring in the ISG-MCP. |
Error | BOOL | Is TRUE if the FB is in error state. A parameter set change was not executed properly. |
ErrorID | WORD | Error code. |
1) Availability is dependent on the MCE used.
Behaviour of the FB
- The FB is in an error state if "error" = TRUE. The parameter set has not been changed correctly. An error has occurred either in the function block itself or in the ISG-MCP. The "NCError" output parameter indicates whether an error has occurred in the ISG-MCP.
- If the “NCError” is TRUE and “NCParamConsistent” is TRUE, the new parameter set was not interpreted properly. No new parameters have been read in and the old parameters remain unchanged.
Attention
If the function block reverts to error state when the parameter set is changed, i.e. “Error” = TRUE and “NCError” = TRUE at the same time and “NCParamConsistent”, the control unit is in possession of inconsistent data.
Either a new parameter set must be correctly read in or the controller must be restarted.
- If the FB returns a warning ("nc_warning" = TRUE), it was not possible to accept at least one parameter and this parameter's value has been internally corrected by the controller.
Example
Using the “NCParamSetIDIn” block
If the parameter sets are saved to files, as is the case with sets of the ACHS_MDS type, the default parameter set is the one which is specified in the start-up list for the associated axis and which is interpreted and activated when the motion controller is started up. Example of the 1st axis in the system:
achs_mds[0] isgnc\listen\achsmds1.lis
The default parameter is selected when the value 0 is applied to the “NCParamSetIDIn” input.
The names of all further files with alternative parameter sets for this axis are derived from the name of the default parameter set appended by an additional number and separated by an underscore.
achsmds1_1.lis
achsmds1_2.lis
...
The appended number is applied to the “NCParamSetIDIn” input if an alternative parameter set is to be activated.
The files containing the alternative parameter sets must be located in the same directory as the file of the default parameter set.