INSTALLATION
AND
OPERATION
2-38
4.
Run the program by typing on the Controller “RUN (RETURN)”.
2-40.
Interface
Functions
The Generator
implements
a
subset of interface functions defined
by
the IEEE Standard
488-1978.
Table
2-9
summarises
the interface functions implemented. This section
describes the operation of the Generator
in response
to interface messages
associated
with
each
interface function.
Table
2-9.
IEEE-488 Interface
Functions List
FUNCTION
DESCRIPTION
SH1 Complete source
handshake capability
AH1
Complete acceptor handshake capability
T5 Basic talker. Talk only.
Serial poll. Unaddressed if MLA
TED No extended talker capability
i_5 Basic Listener, Listen only.
Unaddressed if MTA
LEO
No extended listener capability
SRI Complete service request
capability
RL1
Complete remote/Local capability
PPO No parallel poll
capability
DC1
Complete device clear
capability
OTI Complete device
trigger
capability
CO
No controller capability
El Open-collector
drivers
2-41.
Address Mode
In the address mode, the
Generator
may
be
operated from local (using the Front Panel
keys) or from remote (using
the IEEE-488 Interface). The following paragraphs describe
the
operation of the Generator
in
both states
and transitions between the states.
The available IEEE-488
messages and their descriptions for the
address mode of
operation
are presented in Table
2-10.
2-42.
LOCAL
OPERATION
The Generator powers up
in the local mode. When in local
mode,
the following
conditions arc present:
The front panel indicator REM, is
not
lit.
Device trigger (GET), device dear (DCL), and
selected device clear (SDC) interface
messages
are ignored.
All
device
dependent messages are
ignored.
If the data
output was requested while the Generator was
in the
remote mode, the
data output of a
talker may
be
sent.
2-43.
GOING FROM LOCAL
TO REMOTE
The Generator
switches from
local
to
remote when the “my listen address
message”
(MLA) is received, and the
Remote
Enable (REN) signal is true.
t
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