INSTALLATION AND
OPERATION
Table
2-10.
IEEE’488 Address Mode Message
Descriptions
(cont)
MESSAGE
DESCRIPTION
SDC
Selected Device
Clear
Clear The SDC message is ignored during local operation.
Operation
When the SDC
message is
received
(during remote
operation), the Generator is cleared. Any characters in
the
input buffer
are
cleared
followed by the same
operation
as
the
clear command
("CL").
The operation of the
SDC message is identical to the operation of
the
device
clear (DCL) message. The cleared state of the Generator
is described in the paragraphs on
Power-On
Conditions.
GET
Group Execute
Trigger
Trigger The
GET
message is ignored during local operation.
When
Operati on the GET message is received (during remote operation),
the Generator executes
a
command string that
has been
preprogrammed with the Configure Trigger command ("CT").
The operation of the GET message
is
identical to the
operation of the Trigger ("TR") command.
Undefined IEEE-488
Commands
AIL undefined IEEE-488 commands are acknowledged by the
Generator handshake sequence, but no action is taken.
2-44.
REMOTE OPERATION
When
in
the remote
mode, the
following conditions are present:
The front panel REM
indicator
is lit.
Device trigger (GET),
device
clear
(DCL), and selected device clear (SDC) interface
messages are processed.
All device-dependent messages are
processed
during the remote mode,
2-45.
GOING FROM REMOTE TO LOCAL
The
Generator
switches from remote to local mode in one of the following ways:
The
IEEE-488
Go
To Local
(GTL)
message
is received, the remote
enable
signal REN is false,
or a Return To Local (rtl) message is generated
by
pressing the front panel [CLR/ LCL]
key (if the Generator is not in the local lockout mode).
The Generator enters the local lockout mode
when the Local Lockout message (LLO) is
received. The Generator exits the
local lockout
mode to the local mode when REN is
false.
When switching from remote to local,
unprocessed
commands in the input buffer are
processed until
the
input
buffer is cleared or a front panel entry is made. Switching to
local has no effect on the contents of the output buffer.
2-46.
Talk-Only Mode
Figure
2-6
shows two 6060B connected together with the
IEEE-488
Bus.
2-41
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