Ler - HP 54501A Programming Reference Manual

LER
LER
(Local Event Register)
query
The
LER
query allows the
LCL (Local) Event
Register
to be read. After
the
LCL Event Register
is
read, it is
cleared.
A
one indicates
a
remote to
local transition has taken
place due
to the
front-panel
LOCAL key being
pressed. A
zero indicates
a
remote to local transition has not
taken place.
Once
this
bit
is set
it can
only be cleared
by reading the Event Register or
sending
a
*CLS
command.
A
Service Request
(SRQ)
can only be generated when the bit
transitions
from
0
to
1,
therefore the
bit must be cleared each time you would like
a
new Service Request to
be generated.
Query Syntax:
:LER?
Returned Format:
[:LER]
{l
| 0}
<NL>
Example: OUTPUT
707;":LER?"
ENTER
707;Event$
PRINT
EventS
Root Level
Commands
6-10
HP 54501A
Programming