Chapter 4 Programming Instances RIGOL
DL3000 Programming Guide 4-1
Chapter 4 Programming Instances
This chapter illustrates how to program DL3000 series with SCPI commands based on NI-VISA in Excel,
MATLAB, LabVIEW, Visual C++, and Visual C#.
NI-VISA (National Instrument-Virtual Instrument Software Architecture), developed by NI (National
Instrument), provides an advanced programming interface to communicate with various instruments
through their bus lines. NI-VISA enables you to communicate with the instrument in the same way, without
considering the interface type of the instrument (such as GPIB, USB, LAN/Ethernet, or RS232).
The instruments that communicate with NI-VISA through various interfaces are called "Resources". The
VISA descriptor (i.g. resource name) describes the accurate name and location of the VISA resource. For
example, when you use the LAN interface to communicate with the instrument, the VISA descriptor is
displayed as ":TCPIP::172.16.3.93::INSTR". Before programming, please obtain the correct VISA
descriptor.
Contents in this chapter:
Programming Preparations
Excel Programming
MATLAB Programming Instance
LabVIEW Programming Instance
Visual C++ Programming Instance
Visual C# Programming Instance
Programming Preparations
Before programming, you need to prepare the following tasks:
1. Install Ultra Sigma (PC) software. You can log in to RIGOL official website (www.rigol.com) to
download the software. Then install the software according to the installation wizard. After Ultra Sigma
is installed successfully, NI-VISA library will be completely installed automatically. In this manual, the
default installation path is C:\Program Files\IVI Foundation\VISA.
2. In this manual, the electronic load communicates with the PC via the USB interface. Use the USB cable
to connect the load to the PC via the USB DEVICE interface on the rear panel of the load. You can also
use LAN, RS232, or GPIB (expanded with RIGOL's optional USB-GPIB interface converter) to remotely
communicate with the PC. Note: The RS232 protocol command ends with "\r\n" for the DL3000 series.
3. After the load is properly connected to the PC, connect the load to power source and turn it on.
4. In this case, "Found New Hardware Wizard" dialog box appears on the PC. Please install "USB Test and
Measurement Device (IVI)" according to the instructions.
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