Axis-specific interface

PLC present
Description	By setting the value to TRUE, the PLC signals that it is present. Only if this value is set to TRUE can the PLC influence the NC kernel and is supplied with the technology commands by the NC kernel.
Information flow	PLC -> CNC
ST path	pAC[axis_idx]^.addr^.HLIHeadAxe_Data.X_PLCPresent
Data type	BOOL
Value range	[TRUE = PLC present, FALSE]
Access	Write
Characteristics

Updating the HLI
Description	By setting this value to TRUE, the PLC can trigger updating of the entire axis-specific interface area. This value is reset to FALSE by the NC kernel after updating is complete.
Information flow	CNC <-> PLC
ST path	pAC[axis_idx]^.addr^.HLIHeadAxe_Data.X_FUpdateRequest
Data type	BOOL
Value range	[TRUE = Updating of the HLI activated, FALSE]
Access	Write/read
Characteristics	Is currently still supported, i.e. the HLI is updated in each NC cycle.

Update cycle of the HLI
Description	Using this element, the PLC informs the NC kernel over how many interrupt cycles the NC kernel may distribute updating of the axis-specific interface area. This leads to a lower loading of the interrupt task particularly in the case of multi-channel and multi-axis configurations.
Information flow	PLC -> CNC
Unit	Number of cycles of the NC kernel
ST path	pAC[axis_idx]^.addr^.HLIHeadAxe_Data.W_NUpdateTickCount
Data type	UINT
Access	Write
Characteristics	Is currently not supported, i.e. the HLI is updated in each NC cycle.

Axis error
Description	The CNC sets this value to TRUE, if the axis is in error state.
Information flow	CNC -> PLC
ST-Pfad	pAC[axis_idx]^.addr^.HLIHeadAxe_Data.X_Error
Data type	BOOL
Value range	[TRUE = Axis is in error state, FALSE = No error]
Access	Read
Characteristics