National Instruments GPIB-232CV, Руководство пользователя

Страница: 20 / 59

© National Instruments Corp. 2-1 GPIB-232CV User Manual
Chapter 2
Configuration and Installation
This chapter describes the procedures for configuring and installing the
GPIB-232CV.
As mentioned in Chapter 1, the GPIB-232CV can be configured either as a
GPIB Controller capable of addressing a single GPIB device to talk or
listen, or as a GPIB device that can be addressed to talk or listen by a GPIB
Controller.
Choosing Between D Mode or C Mode
When transferring data to or from a GPIB device that has no controller
capabilities, the GPIB-232CV should be set to operate in the Controller (C)
mode. This is because in a GPIB system there must exist at least one
Controller that is responsible for addressing the instruments on the bus to
talk and listen. In this mode the GPIB-232CV, upon power-up, will assert
Interface Clear (IFC) and address the GPIB instrument using the GPIB
primary address set on the configuration switches. An example of a system
operating in C mode is a GPIB device, such as a digital multimeter,
connected to an IBM PC serial port through a GPIB-232CV.
Digital Multimeter
(GPIB Device)
Serial
Cable
GPIB
Cable
GPIB-232CV
IBM PC
(Serial Device)
GPIB-422CV
IEEE 488 RS-422 CONVERTER
POWER READY TALK LISTEN BUSY FULL
Figure 2-1. Example of C Mode System Setup