Addi-Data APCI-8001 Manual - Página 8

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The size of the data block in a scan is always fixed. The number of lines in this data structure (zn) is

specified in the object descriptor element "Index" in the less significant 16 bits. The number of

columns (an) is specified in the object descriptor element "SubIndex". The content of "Index" and

"SubIndex" is described in more detail below.

The number of elements containing valid measuring values may vary from scan element to scan

element and is specified in the first element of the data structure ("Number").

The second element in the data block ("Status") is bit-coded and shows, for example, a possible data

overrun. The meaning of this register is described in Table 5.

The "Lines" element specifies how many lines have been written on with measuring values in the

current block. The "Columns" element specifies how many columns have been written on with

measuring values in the current block. The table with the measuring value follows this. A table

element always has a word length of 32 bits. The content of the table elements is derived from the

ML71 settings and is not specified by RWMOS.ELF. Here, the data formats 32-bit floating point

number,

32-bit integer and 16-bit integer are possible.

Table 5: Bit-coding status word in the "ML71MeasureDataBlock"

Bit No.

Name

Data

Overrun

Size

Change

LineErr

ColErr

3.4.1 The "index" element of the resource "ML71MeasureDataBlock"

Information on the size of the measuring value data block is specified in this element. "Index" must

contain the number of measuring values to be recorded in one line as a numerical value (128 max.).

This is the number of columns in the measuring value table.

3.4.2 The "SubIndex" element of the resource "ML71MeasureDataBlock"

The number of lines with measuring value data in the data structure described above is specified in

the "Subindex" element (16 max). The number of lines actually written on by RWMOS.ELF is

displayed in the 3rd element of the "Lines" data structure.

The size of the scan record is specified by the values entered in "Index" and "SubIndex". To avoid

unnecessary memory requirements in the scanner record and unnecessary data transfer, these

values should not be set any higher than necessary.

Function

Currently not used

A data overrun has taken place; not all data

received could be read.

The number of measuring values in one measuring

value line has changed.

The number of data lines in DataBlock is not

sufficient.

The number of measuring values in one data line

in DataBlock is not sufficient (too few columns

defined).

NTERFACE