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SysFIsOpen, get the file open status

List

This page is part of the IEC 61131-3 Programming Manual. Go to the index.

This function checks whether the communication I / O terminal (Stream) indicated in File It's open. The function returns TRUE if file open.

Function
CODESYS: Not available
LogicLab: eLLabXUnified12Lib

File (EFILEP) I / O terminal (Stream) returned by the resource opening function.

The function returns a (BOOL) FALSE se File unopened, TRUE se File tightness

Examples

Please refer to the example of SysFfopen.

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