VIPA CP 1413plus, Manual

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Programming CP1413plus manual
7-74 Rev. 00/07
Start write operation
#include <S5ACCESS.H>
USHORT WENTRY_C S5StartSchreiben(S5_PARAMS W_POINTER s5)
The
S5StartSchreiben
function initialises a write operation.
You may not start more than one start write operations for a single connection.
Parameters
s5
pointer to a structure of the type
S5_PARAMS
. The values
Kennung, DB, DW
and
Len
of the
s5
structure must contain valid
entries.
s5
must contain a valid connection number which was
returned by the function S5StarteVerbindung . You must
allocate the required amount of memory for received data after the
s5
structure:
s5=malloc(sizeof(S5_SENDLEN);
Write data can be supplied as follows:
memcpy((UCHAR*)s5+sizeof(S5_PARAMS),
&PCData,SENDLEN);
The function will either return a 0 or an H1 error.
Tab. 7-9 contains an overview of the H1 errors and their description.
If the function returns a 0 you can check for completion of the
operation by polling with
S5AbfrageSchreiben
.
Any S5 errors returned by the other station are located in
Fehler
.
Chapter 7.6.3.4 contains an overview of the PLC error codes. A 0 in
Fehler
indicates that the data transfer was completed properly.
Returns
0
H1_BAD_LINE
H1_NO_DRIVER
H1_NO_ADAPTER
See also
S5StarteVerbindung
S5SchreibeInSPS
S5AbfrageSchreiben
S5StoppeVerbindung