SMC_GEOINFO (STRUCT)

TYPE SMC_GEOINFO : STRUCT

This data type is designed to store a path object, i.e. a segment of the programmed path, for example a line, arc or spline segment. In addition to the geometry of these objects, further information can be stored as for example the velocity at the beginning/end of the path or as labels.

Note

As from V3.5 SP2 of the programming system, iSourceLine_No stores the line number of the CNC word and the sentence number is stored in diSentenceNo. In former versions, in particular CODESYS V2.3, the sentence number has been stored in iSourceLine_No.

The parameters dP1 -- dP18 are used for specific use cases.

Depending on iMoveType, these parameters contain different information:

LIN, LINPOS

Complete information stored in piStartPos and piDestPos

CLW, CCLW

The coordinates are stored in the coordinate system (vX, vY, vN).

dP1: X-coordinate of circle center
dP2: Y-coordinate of circle center
dP3: Circle radius
dP4: Z-coordinate of circle

SPLINE

dP1-dP8: Spline parameter
dP9-dP18: Additional spline parameter

ELLCLW, ELLCCLW

dP1: X-coordinate of circle center
dP2: Y-coordinate of circle center
dP3: X-component of the main axis unit vector
dP4: Y-component of the main axis unit vector
dP5: Length of the main axis
dP6: Length of the subaxis
dP7: Angle between main axis and X axis (in rad)
dP8: Ratio P6/P5

INITPOS

-- MCOMMAND: for M-commands (iMoveType = 120) the M-function number SMC_GetMParameters during Interpolation.

dT1 and dT2 are the start and end parameters for circle/spline.

LIN, LINPOS

Complete information stored in piStartPos and piDestPos

CLW, ELLCLW

dT1: Start angle in degree, oriented mathematically (0=east, 90=north, 180=west, 270=south)
dT2: Apex angle of circle in degree (e.g. 90=quarter of circle, 180 = semicircle)

CCLW, ELLCCLW

dT1: Start angle in degree oriented mathematically (0=east, 90=north, 180=west, 270=south)
dT2: Negative apex angle of circle in degree (e.g. -90=quarter of circle, -180 = semicircle)

SPLINE

Start and end value of parameter t, Spline, 0 and 1 by default.

INITPOS

InOut:

Name	Type	Initial	Comment
iObjNo	DINT	0	Arbitrary object number (irrelevant for current path description). It's a 1-based, consecutive ID.
iSourceLine_No	DINT	0	Stores the 0-based line number inside the CNC source file
diSentenceNo	DINT	0	Stores the G-code sentence number (value of the N-word)
iMoveType	SMC_MOVTYP		Value defining the geometrical type of the object. SMC_MOVTYP (ENUM)
piStartPos	SMC_POSINFO		Structure exactly describing the start position of the object. Will be ignored in case of iMoveType = INITPOS.
piDestPos	SMC_POSINFO		Structure exactly describing end position of the object
dP1	LREAL	0
dP2	LREAL	0
dP3	LREAL	0
dP4	LREAL	0
dP5	LREAL	0
dP6	LREAL	0
dP7	LREAL	0
dP8	LREAL	0
dP9	LREAL	0
dP10	LREAL	0
dP11	LREAL	0
dP12	LREAL	0
dP13	LREAL	0
dP14	LREAL	0
dP15	LREAL	0
dP16	LREAL	0
dP17	LREAL	0
dP18	LREAL	0
vX	SMC_Vector3D	STRUCT(dX := 1, dY := 0, dZ := 0)	X-axis of the local coordinate system, expressed in world coordinates.
vY	SMC_Vector3D	STRUCT(dX := 0, dY := 1, dZ := 0)	Y-axis of the local coordinate system, expressed in world coordinates.
vN	SMC_Vector3D	STRUCT(dX := 0, dY := 0, dZ := 1)	Z-axis of the local coordinate system, expressed in world coordinates.
dT1	LREAL	0	Start parameter for circle/spline
dT2	LREAL	1	End parameter for circle/spline
dToolRadius	LREAL	0	Information necessary for path processing with SMC_ToolCorr or SMC_RoundPath. Irrelevant else.
dVel	LREAL	0	Target velocity to be reached (in path units/sec)
dVelEnd	LREAL	0	Prescribed velocity at end of object (path units/sec)
dVelEndStored	LREAL		Maximum speed at end of segment before call to SMC_CheckVelocities.
dVelEndSafe	LREAL	0	Computed for the quadratic velocity profile: maximum <= dVelEnd that allows to reach dVelEndSafe of the next element. May be -1 if the next element has identical values for acceleration, deceleration, and velocity.
dAccel	LREAL	100	Maximum allowable acceleration (in path units/sec²)
dDecel	LREAL	100	Maximum allowable deceleration (in path units/sec²)
dLength	LREAL	0	Length of object in path units
wInternMark2	WORD	0	Intern marks for tool correction, rounding, etc.
byInternMark	BYTE	0	Start and end of path preprocessing actions: Bit 0 set: Stop tool radius correction after this object Bit 1 set: Start tool radius correction to the left of this object Bit 2 set: Start tool radius correction to the right of this object Bit 3 set: Stop path rounding/smoothing after this object Bit 4 set: Start path smoothing at this object Bit 5 set: Start path rounding at this object Bit 6 set: Stop avoiding loops after this object Bit 7 set: Start avoiding loops at this object
dwFeatureFlags	DWORD		If TRUE, the object is a 3D-object
b3DMode	BOOL	FALSE	Stores feature bits set by G38/G39
dHelpPos	ARRAY [0..MAX_IPOSWITCHES] OF LREAL		Relative position of auxiliary switches (0: object start, 1: object end, similar to G-code: O)
iHelpID	ARRAY [0..MAX_IPOSWITCHES] OF INT		ID (G-code: H) of auxiliary switches. If the current object is of type MCOMMAND, iHelpID[0] will contain the number of the M-option.
adVelAddAx	ARRAY [0..7] OF LREAL		If value <> 0, then it specifies the velocity values for following use: [0]: all G0 commands [1]: Z-axis [2]: P-axis [3]: Q-axis [4]: U-axis/A-axis [5]: V-axis/B-axis [6]: W-axis/C-axis [1] - [6]: These are maximum values used of SMC_ExtendedVelocityChecks.
adAccAddAx	ARRAY [0..7] OF LREAL
adDecAddAx	ARRAY [0..7] OF LREAL
aAdditionalParams	ARRAY [0..(SMC_MAX_ADDITIONAL_PARAMS - 1)] OF LREAL		Additional parameters set by G38 I/J/K
adToolLength	ARRAY [0..2] OF LREAL		Parameters for tool length compensation (set by G43 I/J/K)