Abbreviations used in
this Document
EOL
End of Line Sequence (used for termination).
Sequence
Character( s) at the end of a line or message
EOI Signal End-or-Identify Signal (separate HP-IB signal line used
for terminating a message)
CR
CST
LF
STB
RQS
SRQ
SPOLL
PPOLL
Learn
String
carriage-return; ASCII character with the ASCII-code
13
current settings command (used to read the current
instrument state)
line-feed; ASCII character with the ASCII-code 10
Status Byte Register
Request Service Bit
Service Request
Serial Poll (used to determine whether a device is
requesting service; returns the value of the Status Byte
Register)
Parallel Poll (not supported by the HP 8 1 12A)
ASCII string returned after a CST command; contains
all necessary commands to set the HP 81 12A to its
present state. The Learn String may later be sent back
to the device to place it in this state.
Terminators
The HP 81 12A accepts the following terminators:
Note
•
CR/LF (the default EOL sequence)
•
EOI only
•
CR/LF and EOI
•
LF and EOI
LF alone is not accepted
as
terminator when the HP 81 12A is
connected to a HP9000 Series 200/300 controller. When connected to
other controllers, the HP 81 12A may accept J,F as terminator.
The HP 81 12A itself, terminates a data message sent to the computer
with:
CR/LF followed by a SPACE character
The EOI line is not polled by the HP 81 12A.
Programming 6-3
Summary of Contents for 8112A
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Page 290: ...R B c R3 BD RY M I CROPROCESSOR 1 2 3 FIGURE 1 0 7 8 ...
Page 294: ... 8 X2l 2 X2 Figure A 1 Mechanical Parts 1 A 2 Replaceable Parts ...
Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...
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Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...
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