Input Description

EN (enable)

Data type: BOOL

The Function Block is activated by a TRUE at the input EN. A FALSE keeps the Function Block deactivated. Is the Function Block activated, the values being present at the inputs are processed and the output values are delivered.

FILE (file path and name)

Data type: STRING

Input is used to enter the absolute path and name of the file whose information is required.

If the path or the file name given is incorrect or invalid, an error occurs at output ERNO and output ERR = TRUE.

Example of the value of FILE

File is present on the flash: flashdisk\Sample.wav

File is present on the SD card: SDCard\Sample.wav

BUFFER (memory buffer)

Data type: DWORD, Default value = 0

Input BUFFER contains the memory address of the array where all the measured data is stored after reading.

Example

If the measured data is stored in the array ‘abyReadData[1..100]’, then BUFFER=ADR(abyReadData).

SIZE (size of data to be read)

Data type: UDINT, Default value = 1, Range ³ 1 (block align) and £ data size of the file.

Input SIZE gives the number of bytes of the measured data to be read and stored in the buffer. The function block would throw an error, if value of SIZE given as 0. For a given file, the input SIZE value must always be the integral multiple of its block align value.

Example

With data size = 1000 and block align = 4, the valid value of SIZE is in the range from 4 to 1000.

SIZE must not exceed the data size of the WAV file.