Instrument Control Toolbox

The VISA-GPIB-VXI Address

The VISA-GPIB-VXI address consists of a VXI component and a GPIB component. The VXI component includes

• The chassis index of the VXI chassis
• The logical address of the VXI instrument; the logical address must be 0, or it must be divisible by 8
• The slot of the VXI instrument

The GPIB component includes

• The board index of the GPIB controller installed in your computer
• The primary address of the GPIB-VXI command module in slot 0
• The secondary address of the VXI instrument

You must specify the logical address value via the resource name during VISA-GPIB-VXI object creation. Additionally, you must include the chassis index value as part of the resource name if it differs from the default value of 0. The properties associated with the VISA-GPIB-VXI address are given below.

Table 4-9: VISA-GPIB-VXI Address Properties 

Property Name	Description
BoardIndex	Indicate the index number of the GPIB board.
ChassisIndex	Specify the index number of the VXI chassis.
LogicalAddress	Specify the logical address of the VXI instrument.
PrimaryAddress	Indicate the primary address of the GPIB-VXI command module.
SecondaryAddress	Indicate the secondary address of the VXI instrument.
Slot	Indicate the slot location of the VXI instrument.

The ChassisIndex and LogicalAddress properties are automatically updated with the specified resource name values when you create the VISA-GPIB-VXI object. The BoardIndex, PrimaryAddress, SecondaryAddress, and Slot properties are automatically updated after the object is connected to the instrument with the fopen function.

You can display the address property values for the VISA-GPIB-VXI object vgv created in Creating a VISA-GPIB-VXI Object with the get function.

• fopen(vgv)
  get(vgv,{'BoardIndex','ChassisIndex','LogicalAddress',...
  'PrimaryAddress','SecondaryAddress','Slot'})
  ans = 
      [0]    [0]    [80]    [9]    [10]    [2]
  

Creating a VISA-GPIB-VXI Object

The Serial Port Interface