•
An instrument, therefore, may be talk-addressed, listen-addressed, or
unaddressed by the controller.
If the controller addresses the instrument to talk, it will remain configured to
talk until it receives:
•
an interface clear message (IFC)
•
another instrument’s talk address (OTA)
•
its own listen address (MLA)
•
a universal untalk (UNT) command.
If the controller addresses the instrument to listen, it will remain configured
to listen until it receives:
•
an interface clear message (IFC)
•
its own talk address (MTA)
•
a universal unlisten (UNL) command.
HP-IB Bus Addressing
Because HP-IB can address multiple devices through the same interface card,
the device address passed with the program message must include not only
the correct instrument address, but also the correct interface code.
Interface Select Code (Selects the Interface)
Each interface card has its own interface select code. This code is used by
the controller to direct commands and communications to the proper
interface. The default is always "7" for HP-IB controllers.
Instrument Address (Selects the Instrument)
Each instrument on the HP-IB port must have a unique instrument address
between decimals 0 and 30. The device address passed with the program
message must include not only the correct instrument address, but also the
correct interface select code.
Programming Over HP-IB
HP-IB Bus Addressing
2–4
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 ...
Page 234: ......
Page 235: ...15 Programming Examples ...