Jäger ADwin-Gold-USB Manual page 7

ADwin
Communication between ADwin system and PC
The ADwin system is connected to the PC via an USB or Ethernet interface.
After power-up the ADwin system is booted from the PC via this interface.
Afterwards the ADwin operating system is waiting for instructions from the PC
which it will process.
There are two kinds of instructions: On the one hand instructions, which trans-
fer data from the PC to the ADwin system, for instance "load process", "start
process" or "set parameter", on the other hand instructions which wait for a
response from the ADwin system, for instance "read variables" or "read data
sets". Both kinds of instructions are processed immediately by the ADwin sys-
tem, which means immediate and full range responds. The ADwin system
never sends data to the PC without request! The data transfer to the PC is
always a response to an instruction coming from the PC. Thus, embedding the
ADwin system into various programming languages and standard software
packages for measurements is easily made, because they have only to be able
to call functions and process the return value.
Under Windows 95/98/NT/ME/2000/XP you can use a DLL and an ActiveX
interface. On this basis the following drivers for development environments
are available:
.NET, Visual Basic, Visual-C, C/C++, Delphi, VBA (Excel, Access, Word),
TestPoint, LabVIEW / LabWINDOWS, Agilent VEE (HP-VEE), InTouch, DIA-
dem, MATLAB.
The easy, instruction-oriented communication with the ADwin system enables
several Windows programs to access the same ADwin system in coordination
at the same time. This is of course a great advantage when programs are devel-
oped and installed.
Fig. 1 – Concept of the ADwin systems
ADwin-Gold USB / ENET, manual version 3.8, October 2005
System description
Interfaces
Instruction processing
Software interfaces
3