CNC_RDBTOFSR | NCDATA

Specify the library handle. See "Library handle" for details.

Specify the start tool offset number. The available number is 1,...,9.

'This number + aux. function number which can be got by cnc_rdbtofsinfo function + 1' means the tool offset number for B axis which is used by NC command or display.

Specify the end tool offset number. The available number is 1,...,9.

Specify the tool offset type.(see the following table)

Specify the data block length.

The combinations of the value specified in "type", the data block length "length", the kind of offset value to be read and the member where the result is stored are as follows.

• Tool offset Memory A

type	length	Attribute	Offset type	Member to be stored in
0	8+4*N	individual	Tool offset	btofsr.ofs[i]
-1	8+4*N	all	Tool offset	btofsr.ofs[i]



• Tool offset Memory B

type	length	Attribute	Offset type	Member to be stored in
0	8+4*N	individual	Tool geometry offset	btofsr.ofs[i]
1	8+4*N	individual	Tool wear offset	btofsr.ofs[i]
-2	8+8*N	all	Tool geometry offset	btofsr.ofs[8*i+0]
			Tool wear offset	btofsr.ofs[8*i+4]


is number of offset to be read, i = 0,..,(N-1).

Pointer to the IODBBTO structure including the tool offset value. The IODBBTO structure is as follows.

typedef struct iodbbto {
    short datano_s;             /* start offset number */
    short type;                 /* offset type */
    short datano_e;             /* end offset number */
    long  ofs[M];               /* offset value */
} IODBBTO ; /* M : M is number of the offset value.(Individual, Memory A all)
                   M is number of the offset value * 2.(Memory B all) */