Commanding axis couplings
Commanding axis couplings | |
Description | This control unit defines axis couplings for each axis. The motion of the axis can be influenced additionally or exclusively by the motion of other axes. Further details are contained in the documentation FCT-A9. |
Data type | MC_CONTROL_AXIS_COUPLING, see description Control Unit |
Access | PLC reads state_r and writes command_w + enable_w |
ST path | gpAx[axis_idx]^.lr_mc_control.axis_coupling |
Commanded values | |
ST Element | .command_w |
Signal flow | PLC → CNC |
Data type | |
Access | PLC writes |
Return value | |
ST Element | .state_r |
Signal flow | CNC → PLC |
Data type | |
Access | PLC reads |
Redirection | |
ST Element | .enable_w |
Axis couplings, state | |
Description | Indicates whether the axis couplings are active for this axis and if so, which ones. |
Signal flow | CNC → PLC |
Data type | HLI_STATE_AXIS_COUPLING |
ST path | gpAx[axis_idx]^.lr_mc_control.axis_coupling.state_r |
Access | PLC reads |
Elements of the data type | |
Element | .desc[ ] |
Data type | ARRAY[0..HLI_AX_COUPLING_MAXIDX] OF HLI_AXIS_COUPLING_DESC |
Access | PLC reads |
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Element | .active_r |
Data type | BOOL |
Access | PLC reads |
Axis couplings, command | |
Description | This entry defines a coupling all coupling specification for the axis. The maximum possible number of coupling specifications is defined by the constant HLI_AX_COUPLING_MAXIDX + 1. Further details on the definition of coupling specifications are contained in the documentation @@[FCT-A9]. |
Signal flow | PLC → CNC |
Data type | HLI_COMMAND_AXIS_COUPLING |
ST path | gpAx[axis_idx]^.lr_mc_control.axis_coupling.command_w |
Access | PLC writes |
Elements of the data type | |
Element | .desc[ ] |
Data type | ARRAY[0..HLI_AX_COUPLING_MAXIDX] OF HLI_AXIS_COUPLING_DESC |
Access | PLC writes |
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Element | .semaphor_rw |
Data type | BOOL |
Special features | Consumption data item |
Access | CNC accepts the commanded values when this element has the value TRUE. After acceptance, the CNC sets this value to FALSE. The PLC sets this element to TRUE when the commanded values are released for acceptance by the CNC. The commanded values can only be updated by the PLC if this element has the value FALSE. |
Description of an axis coupling specification | |||
Description | This entry defines a coupling all coupling specification for the axis. The maximum number of definable coupling specifications is defined in the constant HLI_AXIS_COUPLING_COUNT. Further details on the definition of the coupling specifications are contained in the documentation [FCT-A9]. | ||
Signal flow | PLC → CNC | ||
ST Path | gpAx[axis_idx]^.lr_mc_control.axis_coupling.command_w.desc[idx] gpAx[axis_idx]^.lr_mc_control.axis_coupling.state_r.desc[idx] | ||
Data type | HLI_AXIS_COUPLING_DESC | ||
Access | Command for axis coupling: PLC writes Status of axis coupling: PLC reads | ||
Elements of the data type | |||
ST Element | .mode | ||
Data type | UINT | ||
Value range | Constant | Value | Description |
HLI_AXIS_COUPLING_INACTIVE | 0 | Coupling is not active. | |
HLI_AXIS_COUPLING_ZERO | 1 | Coupling factor is zero, used to deactivate an axis. | |
HLI_AXIS_COUPLING_DIRECT | 2 | Coupling factor is 1. | |
HLI_AXIS_COUPLING_MIRROR | 3 | Coupling factor is -1. | |
HLI_AXIS_COUPLING_FRACT | 4 | Coupling factor is a fraction defined by .desc[idx].FractNumerator / .desc[idx].FractDenominator.
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ST Element | .ax_nr | ||
Data type | UINT | ||
Description | Logical axis number of the source axis (the influencing axis). If the axis is to be moved by the NC program when the coupling is active, a coupling specification must be defined with the logical axis number of the axis and the coupling mode HLI_AXIS_COUPLING_DIRECT. | ||
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ST Element | .fract_num | ||
Data type | INT | ||
Value range | The permissible value range is [-32768, 32767]. A value of 0 in this element has the same effect as the coupling mode HLI_AXIS_COUPLING_INACTIVE. | ||
Description | Numerator of the coupling factor if the coupling mode is specified as HLI_AXIS_COUPLING_FRACT. This element is not evaluated for all other coupling modes. The maximum permissible value for the coupling factor desc[idx].fract_num / .desc[idx].fract_denom is defined by the constant HLI_AXIS_COUPLING_FACT_MAX. If this value is exceeded, the error message P-ERR-70397 is issued. | ||
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ST Element | .fract_denom | ||
Data type | INT | ||
Value range | The permissible range is [-32768, 32767] excluding the 0. A value of 0 in this element results in output of the error message P-ERR-70396. | ||
Description | Denominator of the coupling factor if the coupling mode is specified as HLI_AXIS_COUPLING_FRACT. This element is not evaluated for all other coupling modes. The maximum permissible value for the coupling factor .desc[idx].fract_num / .desc[idx].fract_denom is defined by the constant HLI_AXIS_COUPLING_FACT_MAX. If this value is exceeded, the error message P-ERR-70397 is issued. | ||