Automatic control function programming manual ladder language

Programming in C Language
Write a File USER_WRITE_F
Syntax
SINT32 USER_WRITE_F(UINT32 pF_Id, UINT8 *pBuf, UINT32 Buf_Size)
Description
Writes data in the file specified by pF_id. The write always begins on the file pointer. After the write, the pointer is
positioned on the last byte in the file.
Parameters
Inputs: pF_id: File identifier returned by function «USER_OPEN_F».
pBuf: Buffer containing the data to be written.
Buf_Size: Buffer size.
Outputs: None
REMARKS The data are written starting from the current position of the file pointer. The file
pointer is automatically repositioned after the write.
Programming error causing a CPU fault
Access to a prohibited address:
- *pBuf parameter error,
- *pBuf+Requestno outside authorised area.
Reposition the Pointer USER_SEEK_F
Syntax
SINT32 USER_SEEK_F(UINT32 pF_Id, UINT32 mode, SINT32 offset, UINT32 *Old_Ptr)
Description
Repositions the pointer for read or write in the file specified by pF_id.
Parameters
Inputs: pF_id: File identifier returned by function «USER_OPEN_F».
mode: Seek start position. 0 seek from beginning of file.
1 seek from current position.
2 seek from end of file.
offset: Signed offset relative to the mode selected.
Outputs: Old_Ptr: Initial pointer value.
REMARKS The pointer is different for each file.
The pointer is an unsigned variable. Movement outside the file limits generates an
error.
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