10
Checking 5520A Status
(cont)
ESR and ESE
PON
CME
EXE
DDE
QYE
OPC
Power on. This bit is set to 1 if line power has
been turned off and on since the last time the ESR
was read.
Command error. The 5520A’s IEEE-488 interface
encountered an incorrectly formed command.
(The command ERR? fetches the earliest error
code in the error queue, which contains error
codes for the first 15 errors that have occurred.)
Execution error. An error occurred while the
5520A tried to execute the last command. This
could be caused, for example, by a parameter
being out of range. (The command ERR? fetches
the earliest error in the error queue, which
contains error codes for the first 15 errors that
have occurred.)
Device-dependent error. An error related to a
device-dependent command has occurred.
Query error. The 5520A was addressed to talk
when no response data was available or
appropriate, or when the controller failed to
retrieve data on the output queue.
Operation complete. All commands previous to
reception of a *OPC command have been
executed, and the interface is ready to accept
another message.
15
14
13
12
11
10
9
8
0
0
0
0
0
0
0
0
7
6
5
4
3
2
1
0
PON
0
CME
EXE
DDE
QYE
0
OPC
ol02f.eps