Prosoft-technology MVI69-ADM Manuale Utente Scaricare il pdf (Pagina 270)

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CIP Messaging Library Functions MVI-ADM ♦ 'C' Programmable

Developer's Guide 'C' Programmable Application Development Module

Page 270 of 342 ProSoft Technology, Inc.

February 20, 2013

10.3 CIP API Initialization Functions

MVIcip_Open

Syntax

int MVIcip_Open(MVIHANDLE *handle);

Parameters

handle

pointer to variable of type MVIHANDLE

Description

MVIcip_Open acquires access to the CIP Messaging API and sets handle to a

unique ID that the application uses in subsequent functions. This function must

be called before any of the other CIP API functions can be used.

Return Value

MVI_SUCCESS

API was opened successfully

MVI_ERR_REOPEN

API is already open

MVI_ERR_NODEVICE

backplane driver could not be accessed

Note: MVI_ERR_NODEVICE will be returned if the backplane device driver is not

loaded.

Example

MVIHANDLE handle;

if (MVIcip_Open(&handle)!= MVI_SUCCESS)

{

printf ("Open failed!\n");

}

else

{

printf ("Open succeeded\n");

}

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