Control commands for distance control
Commanding distance control | |
Description | This control unit can influence the distance control of the axis. This is dependent on whether the distance control function is selected in the axis parameters (see P-AXIS-00328). |
Data type | MC_CONTROL_DISTANCE_CONTROL, see description of Control unit with usage check |
Access | PLC reads state_r and writes command_w + enable_w |
ST path | gpAx[axis_idx]^.lr_mc_control.distance_control |
Flow control of commanded values | |
ST element | .command_semaphor_rw |
Signal flow | PLC → CNC |
Data type | BOOL |
Peculiarities | Consumption data item |
Access | CNC accepts the commanded values when this element has the value TRUE. After successful acceptance the CNC sets this value to FALSE. PLC sets this value to TRUE when the commanded value is enabled for acceptance by the CNC. The commanded values can only be updated by the PLC if this element has the value FALSE. |
Commanded values | |
ST element | .command_w |
Signal flow | PLC → CNC |
Data type | |
Access | PLC writes |
Distance control state | |
ST element | .state_r |
Signal flow | CNC → PLC |
Data type | |
Access | PLC is reading |
Redirection | |
ST element | .enable_w |
Distance control state | |
Description | This entry reads the distance control state. |
Signal flow | PLC → CNC |
Data type | HLI_DISTANCE_CONTROL_STATE |
ST Path | gpAx[axis_idx]^.lr_mc_control.distance_control.state_r |
Access | PLC is reading |
Elements of the data type | |
Element | .actual_state |
Data type | UDINT |
Access | PLC is reading |
Value range/Description | See table: Distance control states and transitions |
Element | .actual_position |
Data type | DINT |
Unit | 0.1 µm or 0.0001° |
Access | PLC reads |
Description | This data item indicates the current actual position of the workpiece surface detected by the sensing controller. |
Characteristics | This data item is entered only if distance control is activated in the axis parameters (see P-AXIS-00328). |
Element | .actual_offset |
Data type | DINT |
Unit | 0.1 µm or 0.0001° |
Access | PLC reads |
Description | This data item indicates the current position offset of distance control by which the axis was moved due to deviations between the actual workpiece surface and the specified position (SET_POS). The following applies in stationary state (constant workpiece surface and position offset completely run out): Position offset = SET_POS – actual_position |
Characteristics | This data item is entered only if distance control is activated in the axis parameters (see P-AXIS-00328). |
Command for distance control | ||
Description | This entry commands distance control. | |
Signal flow | PLC → CNC | |
Data type | HLI_DISTANCE_CONTROL_COMMAND | |
ST Path | gpAx[axis_idx]^.lr_mc_control.distance_control.command_w | |
Access | PLC writes | |
Elements of the data type | ||
ST element | .transition | |
Data type | UDINT | |
Value range/Description | See Table - Permissible transitions to command distance control | |
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ST element | .position | |
Data type | DINT | |
Value range | [DINT_MIN, DINT_MAX] | |
Description | The meaning depends on the commanded transition: HLI_DIST_CTRL_ON: Command position of the workpiece surface (SET_POS) HLI_DIST_CTRL_REF: Reference position of the workpiece surface (REF_POS) | |
Cyclic command for distance control | |
Description | This entry specifies cyclic set values are specified (position of workpiece surface or set distance). |
Signal flow | PLC → CNC |
Data type | HLIDistanceControlCyclicCommand |
ST Path | pAC[axis_idx]^.addr^.McControlLr_Data.MCControl_DistanceControl.CyclicCommand |
Access | PLC writes |
Elements of the data type | |
ST element | .D_Position |
Data type | DINT |
Value range | [DINT_MIN, DINT_MAX] |
Description | The meaning depends on the commanded transition: HLI_DIST_CTRL_ON: Command position of the workpiece surface (SET_POS) HLI_DIST_CTRL_REF: Reference position of the workpiece surface (REF_POS) |
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ST element | .D_Distance |
Data type | DINT |
Value range | [DINT_MIN, DINT_MAX] |
Description | Specification of the distance to workpiece surface after selection by transition HLI_DIST_CTRL_ON_CONST_DIST. |