This section provides overview, applications, and principles of gpib. Also, please take a look at the list of 5 gpib manufacturers and their company rankings.
GPIB is a means of exchanging signals (so-called interface) between information devices and is often used to connect PCs and measuring instruments.
Originally an in-house standard of Hewlett-Packard Company, it was later approved by the IEEE, the Institute of Electrical and Electronics Engineers of the USA, and became an international standard.
Many of today's measuring instruments are equipped with GPIB as a standard means of exchanging information and are used universally for communication with all kinds of devices, including measurement systems that use PCs and other information devices.
The role of the GPIB board is to prevent data collisions between devices on the GPIB bus communication lines.
In this role, the GPIB board controller limits the number of devices that can send data to only one, and always performs a fixed routine.
GPIB uses the IEEE 488 and IEEE 488.2 communication standards for data communication, and is especially used for sending and receiving text and numerical data between measuring instruments and computers.
With a single GPIB interface on the computer side, up to 15 devices with different communication speeds can be connected. In this case, however, the overall communication speed depends on the slowest device.
GPIBs are used to connect a personal computer to programmable measurement devices for automatic control.
Because of its high noise immunity and reliable communication, GPIBs are often used in laboratory equipment and other devices that require strict control. For example, in electrochemical measurement and surface treatment technology, function generators and electrometers are combined to measure potential and current.
Low-priced measuring instruments are often equipped with RS-232C for serial communication, while high-end instruments often use GPIBs for its high reliability and high-speed communication.
The most important feature of GPIBs are that it allows multiple devices to be connected together; with RS-232C, for example, it is necessary to provide a separate interface or something like a switching hub.
This is made possible by the special connector shape of GPIBs. It has a plug and receptacle in one structure and consists of 16 signal lines, consisting of 8 data buses, 5 management buses, and 3 handshake buses.
Among the devices connected via GPIBs, the device that transmits data is called a "talker" and the device that receives data is called a "listener. A single device can play the roles of both talker and listener, but not at the same time. In this case, communication is performed by alternately switching between transmitting and receiving. Such a device that has the role of designating a talker and listener is called a controller, and generally a personal computer plays this role. Data and commands to and from the controller are exchanged in ASCII format.
*Including some distributors, etc.
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