Yokogawa PC-Based MX100 - Manual (Page 1170)

24-79
IM MX190-01E
DARWIN for Extended API - Visual C/Visual Basic/Visual Basic.NET/Visual C#
24
openDA100Reader
Syntax
DAQDA100READER openDA100Reader(const char * strAddress, int *
errorCode);
Declaration
Visual Basic
Public Declare Function openDA100Reader Lib "DAQDA100"(ByVal
strAddress As String, ByRef errorCode As Long) As Long
Visual Basic.NET
Public Declare Ansi Function openDA100Reader Lib
"DAQDA100"(ByVal strAddress As String, ByRef errorCode As
Integer) As Integer
C#
[DllImport("DAQDA100.dll" CharSet=CharSet.Auto,
EntryPoint="openDA100Reader"]
public static extern int openDA100Reader(byte[] strAddress,
out int errorCode);
Parameters
strAddress Specify the IP address as a string.
errorCode Specify the destination where the error number is to be returned.
Description
Connects to the device with the address specified by the parameters.
• Creates a device descriptor and returns the value as a return value.
• Stores the error number if the return destination is specified.
• The port number is fixed, and it is set to the communication constant,
“instantaneous value loading port number.”
• Initializes the stored data. Retrieves information about the status of the instrument
such as channel information data, and stores the information.
• The specified string is, in general, an ASCII string.
• If unsuccessful, returns NULL in Visual C or 0 in Visual Basic, Visual Basic.NET/
C#.
Return value
Returns the device descriptor.
Error:
Creating descriptor is failure Failed to create the device descriptor.
Reference
CDAQDA100Reader::open
24.3 Details of Functions for Instantaneous Value Loading - DARWIN- Status Transition Functions