HP 8112A, Operating, Programming And Servicing Manual

Page: 85 / 406

Timing Error
(Bit 1)
Note
Syntax Error
(Bit
2)
Slope Error
(Bit
3)
Note
LIMIT-HILC
a. the programmed High-level is greater
than the limited High-level
b. the programmed Low-level is lower than
the limited Low-level
This error appears only when the limit is on
and:
a. High-level control has been selected
b. no High-level limit is possible as HILC is
an external control voltage
There are two types of error (shown for NORM mode only) which set
the timing 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 timing 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
DELAY ERROR
WIDTH ERROR
Comments
• Delay value is greater than Period value.
i.e. PER 1 ms, DEL 1 . 1 ms
• The front panel LEDs flash to indicate the
invalid settings.
• The ERROR LED is on
• Width value is greater than Period value.
i.e. PER 1 ms, WID 1 . 1 ms
• The front panel LEDs flash to indicate the
invalid settings.
• The ERROR LED is on
This error occurs when the HP 81 12A cannot understand a
programming message. e.g DDY
503 instead of DTY 503. The bit
is latched until cleared by reading the status byte.
This error is caused by excessive slope. The conditions which caused
it and the description used by the HP 81 12A when replying to an
IERR
command are listed below. The slope 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
EXCESSIVE SLOPE
Comments
Programming
6-15