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Syntax Overview
This overview is intended to give a quick glance at the syntax defined by
IEEE 488.2. It will help you understand many of the things about the syntax
you need to know.
IEEE 488.2 defines the blocks used to build messages which are sent to the
instrument. A whole string of commands can therefore be broken up into
individual components.
Figure 6-1 is an example syntax diagram and figure 6-2 shows a breakdown of
an example program message. There are a few key items to notice:
•
A semicolon separates commands from one another. Each program
message unit serves as a container for one command. The program
message units are separated by a semicolon.
•
A program message is terminated by a
<NL>
(new line). The recognition
of the program message terminator, or
<PMT>
, by the parser serves as a
signal for the parser to begin execution of commands. The
<PMT>
also
affects command tree traversal.
•
Multiple data parameters are separated by a comma.
•
The first data parameter is separated from the header with one or more
spaces.
•
The header
SYSTEM:LONGFORM OFF
is an example of a compound
header. It places the parser in the machine subsystem until the
<NL>
is
encountered.
•
A colon preceding the command header returns you to the top of the
command tree.
See Also
Chapter 5, "Programming and Documentation Conventions"
Message Communication and System Functions
Syntax Overview
6–7
Summary of Contents for 16501A LOGIC
Page 2: ...ii ...
Page 12: ...Contents 8 ...
Page 14: ......
Page 15: ...1 Introduction to Programming ...
Page 38: ...1 24 ...
Page 39: ...2 Programming Over HP IB ...
Page 45: ...3 Programming Over RS 232 C ...
Page 55: ...4 Programming Over LAN ...
Page 68: ...4 14 ...
Page 69: ...5 Programming and Documentation Conventions ...
Page 81: ...6 Message Communication and System Functions ...
Page 91: ...7 Status Reporting ...
Page 93: ...Figure 7 1 Status Byte Structures and Concepts Status Reporting 7 3 ...
Page 97: ...Figure 7 2 Service Request Enabling Status Reporting Key Features 7 7 ...
Page 100: ...Figure 7 3 Parallel Poll Data Structure Status Reporting Parallel Poll 7 10 ...
Page 105: ...8 Error Messages ...
Page 110: ...8 6 ...
Page 112: ......
Page 113: ...9 Common Commands ...
Page 116: ...Figure 9 1 Common Commands Syntax Diagram Common Commands 9 4 ...
Page 122: ...Figure 9 2 IST Data Structure Common Commands IST Individual Status 9 10 ...
Page 132: ...9 20 ...
Page 133: ...10 Mainframe Commands ...
Page 135: ...Figure 10 1 Mainframe Commands Syntax Diagram Mainframe Commands 10 3 ...
Page 136: ...Figure 10 1 continued Mainframe Commands Syntax Diagram continued Mainframe Commands 10 4 ...
Page 159: ...11 SYSTem Subsystem ...
Page 161: ...Figure 11 1 System Subsystem Commands Syntax Diagram SYSTem Subsystem 11 3 ...
Page 172: ...11 14 ...
Page 173: ...12 MMEMory Subsystem ...
Page 175: ...Figure 12 1 MMEMory Subsystem Commands Syntax Diagram MMEMory Subsystem 12 3 ...
Page 198: ...12 26 ...
Page 199: ...13 INTermodule Subsystem ...
Page 201: ...Figure 13 1 Intermodule Subsystem Commands Syntax Diagram INTermodule Subsystem 13 3 ...
Page 216: ...13 18 ...
Page 217: ...14 TGTctrl Subsystem ...
Page 219: ...Figure 14 1 Targetcontrol Subsystem Commands Syntax Diagram TGTctrl Subsystem 14 3 ...
Page 220: ...Figure 14 1 continued Targetcontrol Subsystem Commands Syntax Diagram TGTctrl Subsystem 14 4 ...
Page 233: ...Part 3 15 Programming Examples 15 1 Programming Examples ...
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Page 235: ...15 Programming Examples ...