Bird Technologies 6091P - Manuale (Pagina 43)

Appendix A
Remote Operating Procedures
The following instructions explain how to use the GPIB feature to remotely control
the calorimeter. All front panel key functions, except the display ON/OFF, can be
controlled via the GPIB. Before proceeding with the remote operating procedures
make sure you are throughly familiar with the normal operating procedures of this
equipment.
Sample GPIB program statements are included for two of the more common GPIB
controllers; National GPIB-PCII and Hewlett Packard Model 9000, Series 200/300.
The National GPIB-PC is a controller card that installs into an expansion slot of an
IBM PC/XT/AT or compatible computer. The HP 9000, Series 200/300 is a stand
alone scientific computer. In each sample statement, it is assumed that the device ad-
dress code is set to 24.
All sample statements are presented in the BASIC/BASICA programming language.
For National GPIB-PC programs, UD% is the Calorimeter unit descriptor and BRD%
is the controller card descriptor. Consult National GPIB-PCII documentation for
more information about the UD% and BRD% descriptors.
GPIB Overview
The general purpose interface bus (GPIB) is a standard cable for parallel control of
electronic equipment. Up to 15 pieces of equipment can be controlled and monitored
for automated testing or data retrieval. A GPIB controller, usually a computer, is
used to take over instrument controls and retrieve measurement data.
GPIB Capabilities
The Calorimeter's GPIB capabilities comply with the requirements of IEEE-488
1978, Standard Digital Interface For Programmable Instrumentation. Table 6 lists
the GPIB capabilities supported by the calorimeter.
31
Function Level Supported Description
Source Handshake SH1 Complete capability
Acceptor Handshake AH1 Complete capability
Talker T6 Basic talker, serial poll
and unaddressed if MLA
Listener L4 Basic listener and unad-
dressed if MTA
Service Request SR1 Complete capability
Remote Local RL1 Complete capability
Parallel Poll PP0 No capability
Device Clear DC1 Complete capability
Device Trigger DT1 Complete capability
Controller C0 No capability
Extended Talker TE0 No capability
Extended Listener LE0 No capability
Table 6
GPIB
Capabilities