Prosoft-technology MVI69-ADM Manual de usuario descargar pdf (Pagina 283)

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

'C' Programmable Application Development Module Developer's Guide

ProSoft Technology, Inc. Page 283 of 342

February 20, 2013

Return Value

The service_proc routine must return one of the following values:

MVI_SUCCESS

message processed successfully

MVI_CIP_BAD_INSTANCE

invalid class instance

MVI_CIP_BAD_SERVICE

invalid service code

MVI_CIP_BAD_ATTR

invalid attribute

MVI_CIP_ATTR_NOT_SETTABLE

attribute is not settable

MVI_CIP_PARTIAL_DATA

data size invalid

MVI_CIP_BAD_ATTR_DATA

attribute data is invalid

MVI_CIP_FAILURE

generic failure code

Example

MVIHANDLE Handle;

MVICALLBACK service_proc ( MVIHANDLE objHandle, MVICIPSERVSTRUC

*sServ )

{

// Select which instance is being accessed.

// The application defines how each instance is defined.

switch(sServ->instance)

{

case 1: // Instance 1

// Check serviceCode and attribute; perform

// requested service if appropriate

break;

case 2: // Instance 2

// Check serviceCode and attribute; perform

// requested service if appropriate

break;

default:

return(MVI_CIP_BAD_INSTANCE); // Invalid instance

}

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