20
7
6
5
4
3
2
1
0
PON
0
CME
EXE
DDE
QYE
0
OPC
PON
Power On. Set to 1 if power was turned on and off before the Event Status Register
was read.
CME
Command Error. Set to 1 when the calibrator receives an invalid command.
EXE
Execution Error. Set to 1 when the calibrator runs into an error while executing is
last command. A parameter that has too significant figures may cause such an
error.
DDE
Device-dependent Error. Set to 1 when, for example, the output of the calibrator is
overloaded.
QYE
Query Error.
OPC
Operation Complete. Set to 1 when the calibrator has finished executing all
commands before the command *OPC was entered.
Error Queue
If an error occurs due to invalid input or buffer overflow, its error code is sent to the error
queue. The error code can be read from the queue with the command FAULT?. The error
queue holds 15 error codes. When it is empty, FAULT? returns 0. The error queue is cleared
when power is reset or when the clear command *CLS is entered.
Input Buffer
Calibrator stores all received data in the input buffer. The buffer holds 250 characters. The
characters are processed on a first in, first out basis.
