Open Method (DioFile)

Applies To

All

Purpose

Creates or opens a DIO file for editing..

Syntax

Object.Open ([sFileName], [enFileMode], [enDioBoardType], [dwSteps], [nChannels])

The Open method syntax has the following parts:

Name	Type	Description
Object	DioFile	DioFile object
sFileName	String	Optional - File name, default name is “Dio.dio”.
enFileMode	enumFileMode	Optional - Integer specifying the type of access requested for the file. Default mode is dioFileModeCreate
enDioBoardType	enumDioBoardType	Optional - Integer specifying the board type. Default board type is dioBoardTypeGX5050.
dwSteps	DWORD	Optional - Number of steps in the new file. Default number of steps is 16384 (16K).
nChannels	SHORT	Optional - Number of channels in the new file. Default number of channels is 32
nBoards	SHORT	Optional - Number of boards in the new file, max number of board is 8 (Master and seven Slaves). Default is one board.

Where

enumFileMode can be one of the following:

Name	Value	Description
dioFileModeRead	0	Read only. If the file does not exist or cannot be found the function call fails.
dioFileModeReadWrite	1	Read and Write. The file must exist
dioFileModeCreate	2	Creates a new file. If the file exists, the function overwrites the file and clears the existing attributes.

enumDioBoardType can be one of the following:

Comments

The total number of channels and steps follow these guidelines:

GX5050/GC5050:

Number of steps can be between 1024 and 1048576. Number of channels is constant 32.

GX5150:

Number of steps can be between 1024 and 33,554,432 (32M) with number of channels must be 32.
Number of steps can be between 1024 and 67,108,864 (64M) with number of channels must be 16 or 8.
Number of steps can be between 1024 and 134,217,728 (131M) with number of channels must be 8.

Creating a new file creates a DIO file with a single master board. The file will have the default settings as follows (All Boards):

GX5150: