Contec CONPROSYS nano CPSN-PCB271-S1-041, Справочное руководство, Страница: 108 / 155

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Programing with CODESYS
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CPSN-PCB271-S1-041 Reference Manual (Software)
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4. Function details
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CFA_FileAccess
Operating functions
This controls access to the specified area.
Input value
Name Data type Meaning
eArea AREATYPE This specifies area types to access.
bMount BOOL This specifies mounting to the file system.
This is necessary if the access area is USB device.
TRUE: This indicates mounting to the file system.
FALSE: This indicates unmounting the file system.
bWriteEnable BOOL This specifies writing and reading permission.
TRUE: This permits writing.
FALSE: This prohibits writing.
Output value
Name Data type Meaning
eError ERROR This indicates an error code.
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CFA_FileOpen
Operating functions
This opens a file in the specified area.
Input value
Name Data type Meaning
eArea AREATYPE This specifies area types to access.
sFileName STRING(256) This specifies a file name.
bWriteEnable BOOL This specifies a file open mode.
"r" : This opens for reading.
"w" : This opens for writing.
"a" : This opens to add writing.
"r+" : This opens for reading and writing.
"w+" : This opens for reading and writing.
"a+" : This opens for reading and to add writing.
Output value
Name Data type Meaning
eError ERROR This indicates an error code.
hFile DWORD This specifies a handle number of the file.