EI_API_CIP_addInstanceAttr()

uint32_t EI_API_CIP_addInstanceAttr	(	T *	pCipNode_p,
		uint16_t	classId_p,
		uint16_t	instanceId_p,
		EI_API_CIP_SAttr_t *	pAttr_p
	)

Add an attribute to an instance.

This function adds a attribute to a instance with the class and instance identifier passed as parameter. The parameter details are passed as a struct of type EI_API_CIP_SAttr_t.

Parameters

[in]	pCipNode_p	Pointer to the CIP node.
[in]	classId_p	Class identifier.
[in]	instanceId_p	Instance identifier.
[in]	pAttr_p	Pointer to struct of attribute parameters.

Returns

EI_API_CIP_EError_t as uint32_t value.

Return values

EI_API_CIP_eERR_OK	Success.
EI_API_CIP_eERR_NODE_INVALID	CIP node is invalid, possibly EI_API_CIP_NODE_new() was not called.
EI_API_CIP_eERR_CLASS_BLACKLIST	Operation on the CIP object with specified identifier (class ID) are not allowed.
EI_API_CIP_eERR_CLASS_DOES_NOT_EXIST	Class does not exists in CIP node dictionary.
EI_API_CIP_eERR_INSTANCE_DOES_NOT_EXIST	Instance does not exist in CIP node dictionary.
EI_API_CIP_eERR_ATTRIBUTE_ALREADY_EXIST	Attribute already exists in class or instance.
EI_API_CIP_eERR_ATTRIBUTE_NOT_IMPLEMENTED	Attribute function not implemented.
EI_API_CIP_eERR_ATTRIBUTE_CDT_SIZE	Passed constructed data type size for e.g. farray not within valid range.
EI_API_CIP_eERR_MEMALLOC	Memory allocation error.
EI_API_CIP_eERR_ATTRIBUTE_EDT_SIZE	Passed elementary data type size for e.g. short string not within valid range.
EI_API_CIP_eERR_INSTANCE_UNKNOWN_STATE	Unknown state during class operation reached.

Example

#include "EI_API.h"
 
 
EI_API_ADP_T* pEI_API_ADP = NULL;
EI_API_CIP_NODE_T* pEI_API_CIP_NODE = NULL;
EI_API_CIP_SAttr_t attr;
uint32_t errCode;
 
uint8_t numInterfaces = 1;
uint16_t classId = 0x0064;
uint16_t instanceId = 0x01;
 
// Create a new adapter first
pEI_API_ADP = EI_API_ADP_new(numInterfaces);
 
// Create a CIP node next
EI_API_CIP_NODE_InitParams_t initParams;
initParams.maxInstanceNum = 256;
 
pEI_API_CIP_NODE = EI_API_CIP_NODE_new(&initParams);
 
// Create a class
errCode = EI_API_CIP_createClass(pEI_API_CIP_NODE, classId);
 
// Create instance in class with identifier classId
errCode = EI_API_CIP_createInstance(pEI_API_CIP_NODE, classId, instanceId);
 
// Attribute parameter set
attr.id = 0x01;
attr.accessRule = EI_API_CIP_eAR_GET;
attr.edt = EI_API_CIP_eEDT_UINT;
attr.cdt = EI_API_CIP_eCDT_NO;
attr.edtSize = 0;
attr.cdtSize = 0;
 
errCode = EI_API_CIP_addInstanceAttr(pEI_API_CIP_NODE, classId, instanceId, &attr);

See also

EI_API_CIP_createClass EI_API_CIP_createInstance EI_API_CIP_SAttr_t EI_API_CIP_EEdt_t EI_API_CIP_ECdt_t EI_API_CIP_EAr_t