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Remote Operation
Checking 525B Status
4
4-25
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.
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 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.)
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.)
Device-dependent error. An error related to a device-dependent command has
occurred.
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.
Operation complete. All commands previous to reception of a *OPC c ommand have
been executed, and the interface is ready to accept another message.
PON
CME
EXE
DDE
QYE
OPC
15 14 13 12 11 10 9 8
00000000
76543210
PON 0 CME EXE DDE QYE 0 OPC
fcn17f.eps
Figure 4-7. Event Status Register (ESR) and Event Status Enable (ESE)
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