Limit Errpr
(Bit 0)
Note
6-14 Programming
Bit
Meaning
0
LIMIT ERROR (Causes SRQ)
1 TIMING ERROR (Causes SRQ)
2 SYNTAX ERROR (Causes SRQ)
3 SLOPE ERROR (Causes SRQ)
DUTY CYCLE ERROR (Causes SRQ)
5 INPUT ERROR (Causes SRQ)
6
SERVICE REQUEST ( =SRQ)
7
BUFFER NOT EMPTY
The SRQ bit generates an interrupt at the system controller to
indicate that the instrument requires attention. You can use this
facility as the basis of interrupt driven error handling in your
programming application.
The SRQ, Programming Error, Syntax Error and System Error bits
are latched until the status byte is polled by the system controller.
The other status bits represent the current condition at the time the
status byte is read.
You can obtain more detailed information about timing and
programming errors using the interrogate error
(IER.R)
mnemonic.
The HP 81 12A responds with a string describing the current error
conditions. The descriptions are covered in subsequent parts of this
section.
DIM E$ [45]
OUTPUT 712 ; " IERR"
ENTER 712 ; E$
Allocate memory for error string
Request error information
Read reply into allocated string
PRINT "81 12A Error= " ; E$
There are two types of error which set the limit error bit in the
status byte. The conditions which cause them and the description
used by the HP 81 12A when replying to an
IERR
command are
listed below. The limit error bit is not latched, therefore a transient
error is only recorded by generating an SRQ.
More than one error condition can occur at one time. When using
the
IERR
command ensure that you allow for a reply containing
more than one error description.
IERR Description
LIMIT ERROR
Comments
This error appears only when the limit is on
and:
Summary of Contents for 8112A
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Page 144: ...8 32 Testing Performance ...
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Page 194: ...10 2 4 Servicing the Power Supply ...
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Page 240: ...10 4 16 Servicing the Shaper and Output Amplifier ...
Page 242: ...A R l BD RY MR I N 1 2 7 I I IJt 51 CR1 B e i 1 _ _ _ _ 20 ...
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Page 262: ...A B A2 ED RY CONTROL ...
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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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