PLC interface
The following data is available on the HLI to use the function:
- The current distance from program start on the path corrected for tool radius compensation is displayed on the channel-specific HLI area (see bahn_state.dist_prog_start_high). This distance can be used to request future contours in Mode 2.
- The contour look-ahead control unit is provided to request and read out contour elements. The PLC requests information with increasing semaphore. The CNC supplies the information and deletes the semaphore afterwards.
Contour look-ahead | |
Description | The PLC can use this control unit to request and read out information on contour elements from the CNC. The PLC can use this information to plan the look-ahead process. |
Data type | HLI_CONTOUR_LOOKAHEAD |
ST path | gpCh[channel_idx]^.contour_lookahead |
Command data | |
ST Element | .request |
Data type | |
Access | PLC writes request |
Return data | |
ST element | .response |
Data type | |
Access | PLC reads |
Flow control of commanded value | |
ST element | .semaphor_rw |
Data type | BOOL |
Value range | [TRUE, FALSE] |
Special features | Consumption data item |
Access | TRUE : PLC triggers on new request FALSE : CNC has read new request |
Status value | |
ST Element | .state |
Data type | |