Installing and Configuring the 82350 1
Example: GPIB Interface Configuration
An I/O interface consists of a hardware interface and a software interface. One purpose of the Connection Expert utility is to associate a unique software interface ID with a hardware interface. The Agilent IO Libraries Suite uses an Interface ID or Logical Unit Number to identify an interface. This information is passed in the parameter string of the viOpen function call in a VISA program or in the iopen function call in a SICL program.
For example, the GPIB interface system in Figure 1- 13 consists of a Windows PC with two 82350 GPIB cards connected to three GPIB instruments via GPIB cables. For this system, the Connection Expert utility has been used to assign GPIB card #1 a VISA interface ID of “GPIB0” and a SICL interface ID of “gpib0”.
Connection Expert has also been used to assign GPIB card #2 a VISA interface ID of “GPIB1” and a SICL interface ID of “gpib1”. With these names assigned to the interfaces, the VISA/SICL addressing is as shown in the figure. Since unique names have been assigned by Connection Expert, you can use the VISA viOpen command to open the I/O paths to the GPIB instruments. Or, you can use the SICL iopen command to open the I/O paths shown.
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