Cyclic Channel Interface

The channel interface is responsible for the cyclic data exchange between the PLC and the NCI.

From the NCI to the PLC (160 bytes)

TYPE NCTOPLC_NCICHANNEL_REF : 
STRUCT
    BlockNo            : UDINT;
    FastMFuncMask      : ARRAY [1..5] OF DWORD;
    HskMFuncNo         : UINT;
    HskMFuncReq        : WORD;
    HFuncValue         : UDINT;
    SpindleRpm         : UINT;
    Tool               : UINT;
    ChnState           : NCTOPLC_NCICHANNEL_REF_CHN_STATE;
    IntParams          : ARRAY [0..3] OF UDINT;
    DoubleParams       : ARRAY [0..3] OF LREAL;
    PathVelo           : LREAL;
    LoadedProg         : UDINT;
    ItpMode            : WORD;
    ItpState           : UINT;
    ErrorCode          : UDINT;
    ChnId              : UINT;
    GrpId              : UINT;
    ItfVersion         : UINT;
    _reserved1         : UINT;
    ChnOperationState  : UDINT;
    McsAxisIDs         : ARRAY [0..7] OF USINT;
    AcsAxisIDs         : ARRAY [0..7] OF USINT;
    _reserved2         : ARRAY [1..24] OF USINT;
END_STRUCT
END_TYPE

Variable name	Data type	Description
BlockNo	UDINT	block number
FastMFuncMask	ARRAY OF DWORD	Bit mask for evaluation of the fast M-functions
HskMFuncNo	UINT	Number of synchronous M-function present (M-function with handshake)
HskMFuncReq	WORD	Flag indicating that a synchronous M-function is present 0: no synchronous M-function is present 1: a synchronous M-function is present
HFuncValue	DINT	Value of the auxiliary function
SpindleRpm	WORD	Spindle rotation speed
Tool	WORD	Tool number
ChnState	NCTOPLC_NCICHANNEL_REF_CHN_STATE	DWORD with status information for the channel (see status information for the channel (ChnState)
IntParams	ARRAY [0..3] OF UDINT	Data of the freely configurable channel interface (see ItpSetCyclicUDintOffsets)
DoubleParams	ARRAY [0..3] OF LREAL	Data of the freely configurable channel interface (see ItpSetCyclicLrealOffsets)
PathVelo	LREAL	Current path set velocity
LoadedProg	UDINT	Name of the currently executed NC program. If the name is not a UDINT, this value is 0.
ItpMode	WORD	Bit mask that indicates execution in interpreter mode.
ItpState	UINT	Status of the interpreter
ErrorCode	UDINT	Error code of the interpreter channel
ChnId	UINT	Channel ID
GrpId	UINT	group ID
ItfVersion	UINT	Version of this cyclic channel interface
ChnOperationState	UDINT	Channel state for a channel of the kinematic transformation; has no purpose for an interpolation channel.
McsAxisIDs	ARRAY [0..7] OF USINT	IDs of the MCS axes for a kinematic transformation channel; has no purpose for an interpolation channel.
AcsAxisIDs	ARRAY [0..7] OF USINT	IDs of the ACS axes for a kinematic transformation channel; has no purpose for an interpolation channel.

Channel status information (ChnState)

In the XAE the channel status information can only be read with a plain text name, from the PLC only via the bit number.

Name	Bit number (zero based)	Description
bIsInterpolationChannel	0	Indicates that the linked channel is an interpolation channel.
bIsKinematicChannel	1	Indicates that the structure is linked to a channel for the kinematic transformation.
bIsEStopRequested	8	Indicates that an ItpEStop was called, without checking whether the axes are already at standstill.
bIsFeedFromBackupList	10	For retracing the current entries from the interpreter backup list are sent.
bIsMovingBackward	11	Indicates that the current motion is a reversing motion.
bRetraceStartPosReached	12	Indicates that the program start was reached during reversing.

From PLC to NCI (128 bytes)

TYPE PLCTONC_NCICHANNEL_REF :
STRUCT
    SkipLine           : WORD; (* Mask to skip lines *)
    ItpMode            : WORD;
    MFuncGranted       : WORD; (* granted signal of the M-function *)
    _reserved1         : UINT;
    ChnAxesOvr         : UDINT; (* Channel override in percent * 100 *)
    ChnSpindleOvr      : UDINT;
    _reserved2         : ARRAY [1..112] OF USINT;
END_STRUCT
END_TYPE

Variable name	Data type	Description
SkipLine	WORD	Bit mask with which block skipping of the NCI is parameterized from the PLC
ItpMode	WORD	Bit mask with which the interpreter execution mode can be altered. This is, for instance, required if the interpreter is to operate in single block mode.
MFuncGranted	WORD	Flag with which an M-function of type 'Handshake' is confirmed. 0: Not acknowledged 1: Acknowledgement
ChnAxesOvr	UDINT	Channel override for the axes from 0...1000000 (corresponds to 0 - 100%)
ChnSpindleOvr	UDINT	Channel override for the spindle between 0 and 1000000 (corresponds to 0 - 100%); currently not supported.