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Bit Assignments for the ESR and ESE
The bits in the Event Status Register (ESR) and Event Status Enable register (ESE)
are assigned as shown in Figure 4-7.
15
14
0
0
7
6
PON
0
PON
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.
CME
Command error. The 525B's IEEE-488 interface encountered an incorrectly formed
command. (The command FAULT? fetches the latest code in the error queue, which
contains error codes for the first 15 errors that have occurred.)
EXE
Execution error. An error occurred while the 525B tried to execute the last command.
This could be caused, for example, by a parameter being out of range. (The command
FAULT? fetches the latest code in the error queue, which contains error codes for the
first 15 errors that have occurred.)
DDE
Device-dependent error. An error related to a device-dependent command has
occurred.
QYE
Query error. The 525B was addressed to talk when no response data was available or
appropriate, or when the controller failed to retrieve data on the output queue.
OPC
Operation complete. All commands previous to reception of a *OPC c ommand have
been executed, and the interface is ready to accept another message.
Figure 4-7. Event Status Register (ESR) and Event Status Enable (ESE)
13
12
0
0
5
4
CME
EXE
Checking 525B Status
11
10
0
0
3
2
DDE
QYE
Remote Operation
9
8
0
0
1
0
0
OPC
fcn17f.eps
4-25
4
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