B&B Electronics VFG3000 - Manual User Manual
Page 317
F
UNCTION
R
EFERENCE
O
PEN
F
ILE
(
NAME
,
MODE
)
R
EVISION
1
P
AGE
301
O
PEN
F
ILE
(
NAME
,
MODE
)
A
RGUMENT
T
YPE
D
ESCRIPTION
name
cstring
The file to be opened.
mode
int
The mode in which the file is to be opened…
0 = Read Only
1 = Read/Write at Start of File
2 = Read/Write at End of File
D
ESCRIPTION
Returns a handle to the file
name
located on the CompactFlash card. This function is restricted
to a maximum of four open files at any given time. The CompactFlash card cannot be
unmounted while a file is open. Note that the filing system used on the card does not support
long filenames, and that if backslashes are included in the pathname to separate path
elements, they must be doubled-up per Fieldbus Gateway Manager’s rules for string constants
as described in the chapter on Writing Expressions. To avoid this complication, forward
slashes can be used in place of backslashes without the need for such doubling. Note also that
this function will not create a file that does not exist. To do this, call
CreateFile()
before
calling this function.
F
UNCTION
T
YPE
This function is active.
R
ETURN
T
YPE
int.
E
XAMPLE
hFile := OpenFile(“/LOGS/LOG1/01010101.csv”, 0)