Command Processing; Command Execution; Error Handling - Fluke 6060B Instruction Manual

INSTALLATION
AND OPERATION
Table 2-18.
SRQ
Maak and
Status Values
VALUE REASON
TRUE
FALSE
1
R^ady
Input
buffer
is
empty
Input
buffer
is not
and no commands are empty
or
commands are
being processed.
being processed.
2
Rejected Entry ieee-
488 rejected
ieee- 488 rejected
entry; error code
is
entry error; code is
not zero. zero.
4
UncaLibrated
RF output
i
s
not RF
output
is
calibrated. (Front
calibrated.
C
Front
panel 'UNCAL' indi- panel *UNCAL' indi-
cator
is
lit.) cator is not Lit.)
8
Power on
Instrument has
powered
up.
Special function 08.
16
Output valid
RF output is settled. RF output is not
settled.
32 Not Used
64
RQS SRQ mask ANDed with Reason for SRQ
goes
currently set values away or serial poll
is
not zero. is
performed.
128
Front panel
Special function 07. Special function 08.
The
trigger
command
causes execution of the trigger buffer,
which
has
been
preprogrammed
with
the
configure
trigger
command
"CT'\
The
trigger buffer
can
also
be
executed by
sending
the
IEEE-488 group
execute
trigger interface
message (GET).
2-60.
Command
Processing
The
following paragraphs describe
how IEEE-488
commands
are processed
by
the
Generator.
Command
processing
is
a term
for
how commands
are
executed
and
how
errors are
handled.
2-61.
COMMAND
EXECUTION
The
execution of the
IEEE-488
commands
depends on
the selection of interface
modes
with
one
exception:
if
an IEEE-488
input
is
buffered
and
the buffer
becomes
full,
command
execution
starts
and no further input
is
accepted
until there
is
room
in
the input
buffer.
For
more
details, refer to
the
paragraphs on
Interface
Modes.
2-62.
ERROR HANDLING
The
Generator
detects
two types of errors while processing
lEEE-488 commands:
syntax
errors
and
processing
errors.
Ail errors are
accumulated
until
the error
status
is
interrogated or
is
explicitly cleared.
The
IEEE-488
rejected
entry
status
is
interrogated
with
the
*TR"
command. The
error status
is
cleared
with one of
the
following
commands:
"CE"
Clear Error
Command
"CL"
Clear
Command
DCL
or
SDC
Clear
Interface
Messages
The
error status
is
also cleared
on
power-up.
I
I
2-60