Prosoft-technology MVI56E-LDM Manual de usuario descargar pdf (Pagina 79)

ControlLogix Platform ♦ "C" Programmable CIP API Functions

Linux Application Development Module Developer's Manual

ProSoft Technology, Inc. Page 73 of 264

March 12, 2014

5.1 CIP API Initialization Functions

OCXcip_Open

Syntax

int OCXcip_Open(OXCHANDLE *apihandle);

Parameters

apiHandle

pointer to variable of type OCXHANDLE

Description

OCXcip_Open acquires access to the CIP API and sets apiHandle 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.

IMPORTANT: Once the API has been opened, OCXcip_Close should always be

called before exiting the application.

Return Value

OCX_SUCCESS

API was opened successfully

OCX_ERR_REOPEN

API is already open

OCX_ERR_NODEVICE

backplane driver could not be accessed

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

loaded.

Example

OCXHANDLE apiHandle;

if (OCXcip_Open(&apiHandle)!= OCX_SUCCESS)

{

printf ("Open failed!\n");

}

else

{

printf ("Open succeeded\n");

}

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Prosoft-technology MVI56E-LDM Manual de usuario Pagina 79