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5.2 GPIB OPERATION
The GPIB (General Purpose Interface Bus) operation allows for constant talk and listen between systems. The PPS
series are able to act as both talkers and listeners. The computer is able to act as a talker, listener, and controller.
LISTENER: A device capable of accepting data over an interface.
TALKER: A device capable of transmitting data over an interface.
CONTROLLER: A device capable of specifying the talker and listener for an information transfer.
5.2.1 GPIB INTERFACE FUNCTIONS:
Even though the GPIB control is implemented in the power supply, instructions are only enabled when a computer
is equipped with a GPIB interface controller card. A controller manages the operation of the bus systems by
designating which devices to send and recieve data. The controller also provides command specificactions within
other devices.
The PPS series support the following IEEE-488 interface functions:
L4 - Basic Listener, Unaddressable if MTA
T6 - Basic Talker, Serial Poll, Unaddressed if MTA
SH1 - Full Source Handshake
AH1 - Full Acceptor Handshake
RL1 - Remote & Local Lockout
DC1 - Device Clear
E1 - Open Collector Driver Electronics (250kb/s max)
C0 - Non-system controller
SR0 - Omitted Service Request Function
TE0 - Omitted extended talker function
LE0 - Omitted extended listener function
PP0 - Omitted parallel poll function
DT0 - Omitted device trigger
5.2.2 ADDRESS SETTING OF GPIB INTERFACE
The main purpose of address setting is for specifying unit identification between the instruments and controller in a
GPIB connection system. The PPS Series has 31 addresses (0-30) available. If a number higher than 30 is selected,
the display shows
"INPUT ERROR!"
and defaults to previous values. The power supplies are preset at the
address 12 by the factory. To view the present address, press the
"ADDRESS"
key. If the present value is
incorrect, enter in a new value with numeric keys and press
"ENTER"
key. In remote mode, the
"ADDRESS"
command is available to modify the address.
5.3 PROGRAMMING SYNTAX
The following table lists programming commands available with the PPS Series. These standard GPIB commands
readily interface with programming languages. Note that this portion of the manual only deals with GPIB
commands. No programming language commands are presented here. Appendix A gives a summary of the
command definitions.
