HP 3336A - Page 44

Model 3336A/B/C
3-128. System Management Messages.
3-129.
The
purpose
of
the
ten
System
Management
Messages
is
to
control
the
system
so
that
Data
and
Trigger
messages
can
be
sent
as
desired.
3-130. Remote. When it is first turned on, the -hp- 3336 is in the Local mode and under
front panel control. In order to be operated over the HP-IB, it must be switched to the
Remote
mode.
The
Remote
Message
switches
the
instrument
to
the
Remote
mode.
In
this
mode, the only operational front panel controls are the Power switch and the Local key (see
Local Lockout Message, Paragraph 3-134). All other instrument functions are activated
over the HP-IB through the system controller. The instrument configuration does not
change when switched to Remote.
3-131,
Implementation.
The
syntax
and
mnemonics
for
the
program
statement(s)
that
im-
plements
the
Remote
Message
are
found
in
the
controller
documentation.
Only
the
listen
ad-
dress,
which
is
$
for
the
-hp-
3336,
must
come
from
the
instrument
documentation.
A
technical
description
of
the
implementation
of
the
Remote
Message
is
presented
in
Figure
3-A-1
of
Appendix
A.
3-132.
Local.
The
Local
Message
switches
the
-hp-
3336
from
Remote
to
Local
operation.
The
instrument
is
operated
using front
panel
controls
while
in
the
Local mode.
Another
way
to
switch
the
instrument
to
the
Local
mode
is
to
actuate
the
front
panel
Local
control
(see
Local
Lockout
Message,
Paragraph
3-134).
3-133. Implementation. The syntax and mnemonics for the program statement that im-
plements the Local Message are found in the controller documentation. Only the listen ad-
dress, which is $ for the -hp- 3336, is taken from the instrument documentation. An instru-
ment must be addressed to listen in order for it to enter the Local mode. A technical descrip-
tion of the Local Message implementation is presented in Figure 3-A-2 of Appendix A.
3-134. Local Lockout. The Local Lockout Message disables the Local control on the front
panel of the -hp- 3336. All devices on the HP-IB with Local Lockout capability will respond
when this message is sent. The instrument can be switched to Local mode by executing the
Local Message. Local Lockout, however, will still be in effect if the instrument is switched
back to the Remote mode. To remove Local Lockout, see Paragraph 3-136, Clear
Lockout/Set Local Message.
3-135. Implementation. The entire program statement that implements the Local Lockout
Message is found in the controller documentation. No part of the program statement
depends on the individual instrument. A technical description of the Local Lockout Message
implementation is presented in Figure 3-A-3 of Appendix A.
3-136. Clear Lockout/Set Local. This message switches all instruments on the HP-IB to the
Local mode and clears all Local Lockout conditions. Other methods to accomplish the same
thing are to disconnect the HP-IB cable, turn the controller off or turn the individual in-
struments off.
3-137. Implementation. The entire program statement that implements the Clear
Lockout/Set Local Message is found in the controller documentation. No part of the pro-
gram statement depends on the individual instrument. A technical description of the Clear
Lockout/Set Local Message is presented in Figure 3-A-4 of Appendix A.
Operation
- 3-23