Prosoft-technology MVI56E-LDM Uživatelský manuál stáhnout pdf (Strana 129)

ControlLogix Platform ♦ "C" Programmable CIP API Functions

Linux Application Development Module Developer's Manual

ProSoft Technology, Inc. Page 123 of 264

March 12, 2014

OCXcip_GetSymbolInfo

Syntax

int OCXcip_GetSymbolInfo(OCXHANDLE apihandle,

OCXTAGDBHANDLE tdbHandle,

WORD symId,

OCXCIPTAGDBSYM *pSymInfo

Parameters

apiHandle

handle returned by previous call to OCXcip_Open

tdbHandle

handle created by previous call to

OCXcip_CreateTagDbHandle

symId

0 thru numSymbols-1

pSymInfo

Pointer to symbol info variable - all members set if success:

name = NULL terminated symbol name

daType = OCX_CIP_BOOL, OCX_CIP_INT,

OCX_CIP_STRING82, etc.

hStruct = 0 if symbol is a base type, else if symbol is a

structure

eleSize = size of single data element; will be zero if the

symbold is a structure and the structure is not accessible as a

whole

xDim = 0 if no array dimension, else if symbol is an array

yDim = 0 if no array dimension, else for Y dimension

zDim = 0 if no array dimension, else for Z dimension

fAttr - Bit masked attributes where,

OCXCIPTAGDBSYM_ATTR_ALIAS - Symbol is an alias for

another tag.

Description

This function gets symbol information from the tag database. A tag database

must have been previously built with OCXcip_BuildTagDb. This function does not

access the device or verify the device program version.

Return Value

OCX_SUCCESS

Symbol info was retrieved successfully

OCX_ERR_NOACCESS

apihandle or tdbHandle is invalid

OCX_ERR_BADPARAM

symId invalid

Example

OCXHANDLE hApi;

OCXTAGDBHANDLE hTagDb;

OCXCIPTAGDBSYM symInfo;

WORD numSyms;

WORD symId;

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 263 264

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