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HP 6038A Service Manual

HP 6038A
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3-86
Unless
configured
remotely,
the
power
supply
responds
to
a
parallel
poll
with
a
"1"
on
one
of
the
DIO
lines
(if
requesting
service),
as
determined
by
the
setting
of
its
ad¬
dress
switches.
Addresses
0
through
7
correspond
to
DIO
lines
1
through
8
(decimal
weight
2°
through
2J).
If
the
address
swit¬
ches
are
set
to
8
or
higher,
the
power
supply
will
not
respond
to
a
parallel
poll
unless
the
unit
is
configured
remote¬
ly.
The
power
supply
can
not
return
a
"0”
to
indicate
it
was
requesting
service
unless
it
has
been
configured
remotely.
3-87
The
power
supply
can
be
configured
remotely
to
re¬
spond
to
a
parallel
poll
with
either
a
"V
or
a
“O"
on
one
of
the
DIO
lines
jf
the
unit
is
requesting
service.
Configuration
statements
with
a
decimal
value
of
0
through
7
will
configure
the
unit
to
respond
with
a
"0"
on
one
of
the
DIO
lines
1
through
8;
decimal
valuesof
8
through
15
configure
the
unit
to
respond
with
a
”1"
on
one
of
DIO
lines
1
through
8.
By
configuring
the
power
supply
remotely,
the
address
switches
may
be
set
to
any
address
from
0
through
30
without
affecting
the
parallel
poll
response.
The
capability
to
configure
either
a
”0"
or
"1"
response
allows
the
user
to
AND
or
OR
two
or
more
instruments
on
one
DIO
line.
3-^
Remote/Local.
The
remote/local
function
allows
the
power
supply
to
operate
in
either
local
(front
panel)
or
remote
(via
HP-IB)
control.
The
user
can
send
Local
Lockout
to
the
power
supply
via
HP-IB
to
disable
the
front-panel
LCL
switch
only.
With
Local
Lockout,
the
controller
determines
if
the
unit
operates
in
local
or
remote
control;
this
enables
the
controller
to
prevent
anyone
else
from
returning
the
power
supply
to
local
control.
3-89
Device
Clear.
Device
Clear
is
implemented
in
the
power
supply
as
Clear
(see
Paragraph
3-180).
The
difference
between
Clear
and
Device
Clear
is
that
Device
Clear
can
be
an
unaddressed
or
addressed
command.
Device
Clear
is
typically
used
in
systems
to
send
all
devices
in
the
system
to
a
known
state
with
a
single
command
(which
could
be
generated
by
a
"'panic”
button).
3-90
Device
Trigger.
Device
Trigger
is
implemented
in
the
power
supply
as
Trigger
(see
Paragraph
3-153).
Each
device
that
is
to
respond
to
Device
Trigger
must
be
addressed.
Device
Trigger
is
typically
used
in
systems
to
synchronize
the
opera¬
tion
of
a
number
of
addressed
devices.
3-91
HP-IB
Address
Selection
3-92
The
five
HP-IB
address
switches
are
located
on
the
rear
panel.
The
HP-IB
address
is
set
in
binary,
with
A1
the
least
significant
bit
and
A5
the
most
significant
bit.
Figure
3-8
shows
the
factory-set
address
of
”5”
(binary
00101).
Any
address
from
00
to
30
decimal
(00000
to
11110
binary)
is
a
valid
HP-18
ad-
dre^.
The
power
supply
will
operate
on
whatever
valid
address
is
set
on
the
address
switches.
Address
31
will
cause
a
self¬
test
error.
3-93
The
operator
should
be
aware
that
some
other
in¬
struments
on
the
HP-IB
may
initialize
at
a
particular
address
although
they
can
be
programmed
subsequently
to
respond
to
a
different
address.
If
the
system
includes
instruments
with
this
characteristic
and
they
are
programmed
for
addresses
other
than
their
initialized
address,
a
momentary
input
power
dropout
may
cause
them
to
re-initialize
their
address.
If
another
instrument,
such
as
the
power
supply,
is
hardware
set
to
that
address,
the
system
wii!
not
function
properly.
Therefore,
the
system
pro¬
gram
should
be
written
to
monitor
any
re-initialization.
Any
pro¬
grammed
data,
such
as
addresses,
that
may
have
been
lost
will
then
have
to
be
reset.
3-94
Holding
the
LCL
switch
in
for
one
second
causes
the
power
supply's
HP-IB
address
to
be
displayed
on
the
front
pane!
until
the
switch
is
released
or
two
seconds
elapse.
3-95
The
address
switches
are
also
used
during
troubleshooting
to
select
which
self
tests
are
run
in
test
mode.
If
the
power
supply
has
been
serviced
be
certain
to
check
the
HP-IB
address
switches.
3-^
Note
that
the
leftmost
switch
in
the
six-switch
package
is
not
an
HP-IB
address
switch.
Be
careful
to
use
the
rightmost
five
switches
for
setting
the
HP-IB
address.
The
following
paragraph
provides
instructions
for
setting
the
leftmost
switch.
3-98
The
power
supply
can
request
service
from
the
con¬
troller
when
power
is
turned
on.
Power-on
service
request
(PON
SRQ)
is
enabled
or
disabled
by
the
rear-panel
PON
SRQ
switch,
and
cannot
be
controlled
by
commands
via
HP-IB.
The
service
request
bit
is
reset
by
a
serial
poll,
regardless
of
whether
set
by
power-on
or
some
other
cause.
3-99
To
enable
power-on
to
request
service,
set
the
PON
SRQ
switch
to
”1”,
as
shown
in
Figure
3-8.
If
enabled,
PON
SRQ
will
request
service
when
the
power
supply
is
turned
on
or
any
time
a
momentary
input
power
dropout
causes
the
power
supply
to
re-initialize.
3-13

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HP 6038A Specifications

General IconGeneral
BrandHP
Model6038A
CategoryInverter
LanguageEnglish

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