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Event Status Register
The Event Status Register is a two-byte register that the higher eight bits are always 0,
and the lower eight bits except bits 6 and 1 represent various conditions of the Calibrator.
The ESR is cleared (set to 0) when the power is turned on, and every time it is read.
A mask register called the Event Status Enable register (ESE) allows the controller to
enable or mask (disable) each bit in the ESR. When a bit in the ESE is 1, the
corresponding bit in the ESR is enabled. When any enabled bit in the ESR is 1, the ESB
bit in the Status Byte Register also goes to 1. The ESB bit stays 1 until the controller
reads the ESR or sends the *CLS command to the Calibrator. The ESE is cleared (set to
0) when the power is turned on.
Bit Assignments for the ESR and ESE
15
14
0
0
7
6
PON
0
PON
Power on. This bit is set to 1 if the power supply has been turned off and on since
the last time the ESR was read.
CME Command error (fault). The Calibrator remote interface encountered an
incorrectly formed command. (The command FAULT? fetches the earliest fault
code in the fault queue, which contains fault codes for the first 15 faults that have
occurred.)
EXE
Execution error (fault). A fault occurred when the Calibrator tried to execute the
last command. One possible cause for this error is a parameter that is out of
range. (The command FAULT? fetches the earliest fault in the fault queue, which
contains fault codes for the first 15 faults that have occurred.)
DDE
Device-dependent error (fault). A fault related to a device-dependent command
has occurred. One possible cause for this error would be an attempt to execute
"OUT 1000000V", which is outside the Calibrator range. (The command
FAULT? fetches the earliest fault in the fault queue, which contains fault codes
for the first 15 faults that have occurred.)
QYE
Query error (fault). The Calibrator 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 an *OPC command
have been executed, and the interface is ready to accept another message.
13
12
0
0
5
4
CME
EXE
Remote Commands and Syntax
11
10
0
0
3
2
DDE
QYE
Check the Calibrator Status
9
8
0
0
1
0
0
OPC
6
6-53
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