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CME
Command Error. Set to 1 when the calibrator receives an invalid command. Entering an
unsupported RTD type may cause such an error.
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.
7.4 Remote Commands and Error Codes
The following tables list all commands, and their descriptions, that are accepted by the calibrator.
Command Description
*CLS
*CLS (Clear status.) Clears the ESR, the error queue, and the RQS bit in the
status byte. Terminates pending Operation Complete commands.
*ESE
Loads a byte into the Event Status Enable register.
*ESE?
Returns the contents of the Event Status Enable register.
*ESR?
Returns the contents of the Event Status register and clears the register.
*IDN?
Identification query. Returns the manufacturer, model number, and firmware
revision level of the Calibrator.
*OPC
Enables setting of bit 0 (OPC for „Operation Complete") in the Event Status
Register to 1 when all pending device operations are complete.
*OPC?
Returns a 1 after all pending operations are complete. This command causes
program execution to pause until all operations are complete.
*RST
Resets the state of the instrument to the power-up state. This command holds
off execution of subsequent commands until it is complete.
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Table 5: Common Commands
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