IEEE-488 Reference
3-30
The bits of the Standard Event Status Register are described as follows:
Bit B0, Operation Complete (OPC) — Set bit indicates that all pending selected device oper-
ations are completed and the Model 6517A is ready to accept new commands. This bit only sets
in response to the *OPC? query command (see paragraph 3.11.6).
Bit B1 — Not Used.
Bit B2, Query Error (QYE) — Set bit indicates that you attempted to read data from an empty
Output Queue.
Bit B3, Device-dependent Error (DDE) — Set bit indicates that an instrument operation did
not execute properly due to some internal condition (such as setting conflict errors, and buffer
sizing and mismatch errors).
Bit B4, Execution Error (EXE) — Set bit indicates that the Model 6517A detected an error
while trying to execute a command.
Bit B5, Command Error (CME) — Set bit indicates that a command error has occurred. Com-
mand errors include:
3. IEEE-488.2 syntax error: Model 6517A received a message that does not follow the defined
syntax of the IEEE-488.2 standard.
4. Semantic error: Model 6517A received a command that was misspelled, or received an op-
tional IEEE-488.2 command that is not implemented.
5. The instrument received a Group Execute Trigger (GET) inside a program message.
Bit B6, User Request (URQ) — Set bit indicates that the LOCAL key on the Model 6517A
front panel was pressed.
Bit B7, Power On (PON) — Set bit indicates that the Model 6517A has been turned off and
turned back on since the last time this register has been read.
3.11.4 *IDN? — identification query Read the identification code
Description The identification code includes the manufacturer, model number, serial number, and firmware
revision levels, and is sent in the following format:
KEITHLEY INSTRUMENTS INC., MODEL 6517A, xxxxxxx, yyyyy/zzzzz
where; xxxxxxx is the serial number
yyyyy/zzzzz is the firmware revision levels of the digital board ROM and display
board ROM.
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