Yokogawa PC-Based MX100 - Manual (Page 1102)

24-11
IM MX190-01E
DARWIN for Extended API - Visual C/Visual Basic/Visual Basic.NET/C# -
24
openDA100
Syntax
DAQDA100 openDA100(const char * strAddress, int * errorCode);
Declaration
Visual Basic
Public Declare Function openDA100 Lib "DAQDA100"(ByVal
strAddress As String, ByRef errorCode As Long) As Long
Visual Basic.NET
Public Declare Ansi Function openDA100 Lib "DAQDA100"(ByVal
strAddress As String, ByRef errorCode As Integer) As Integer
C#
[DllImport("DAQDA100.dll" CharSet=CharSet.Auto,
EntryPoint="openDA100")]
public static extern int openDA100(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 set to the communication constant “communication.
port number.”
• Initializes the stored data. Gets the system configuration data, channel
information data, and status byte and stores it.
• The specified string is, in general, an ASCII string.
• If unsuccessful, returns NULL in Visual C, or otherwise 0.
Return value
Returns the device descriptor.
Error:
Creating descriptor is failure
Failed to create the device descriptor.
Reference
CDAQDA100::open
24.1 Details of Functions - DARWIN (VC/VB/VB.NET/C#) - Status Transition Functions