Programmable AC Source 6430/6420/6415 User‘s Manual
(5) Enable Register: It selects which event bits in the Event Register will cause the
QUEStionable Status summary-message of the Status Byte Register to be TRUE when it is
set. It is cleared at power-on or by the STATus:PRESet command.
6.7.2 Standard Event Status
The Standard Event Status Register latches the following conditions:
(1) Bit 7: Power On (PON). This event bit indicates that an off-to-on transition has occurred
in the device‘s power supply.
(2) Bit 5: Command Error (CME). A syntax or semantic error has been detected.
(3) Bit 4: Execution Error (EXE). The data of a program are outside the legal range, or
inconsistent with the capabilities of the AC source, or the command cannot be executed due
to some condition of operation.
(4) Bit 3: Device-Specific Error (DDE). This event bit indicates that an error has occurred,
which is neither a Command Error, nor a Query Error, nor an Execution Error.
(5) Bit 2: Query Error (QYE). An attempt is made to read data from the output queue when
no output is present or pending, or the data in the output queue have been lost.
(6) Bit 0: Operation Complete (OPC). This event bit is generated in response to the *OPC
command. It indicates that the AC source has completed all pending operations.
The Standard Event Status Register is cleared at power-on, or when it is read, or by the *CLS
common command. The Standard Event Status Enable Register selects which event bits in the
Standard Event Status Register may cause the ESB summary-message of the Status Byte Register
to be TRUE when it is set. It is cleared at power-on.
6.7.3 Status Byte Register
The Status Byte Register summarizes summary-messages from other status. The definitions of
its bits are as follows:
(1) Bit 3: Questionable Status (QUES) Summary-Message. Its state indicates if one or more
of the enabled events defined in Questionable Status have occurred since the last reading or
clearing of the Questionable Event Register.
(2) Bit 4: Message Available (MAV) Queue Summary-Message. Its state indicates whether or
no the Output Queue is empty. Whenever the AC source is ready to accept a request
through the controller to output data bytes, the MVA summary-message is TRUE.
6-22
To Next Page
Loading...
Need help?
General
