Fluke PM6681R, PM6685 Standard Event Status Register, Summary, Standard Event Status Reporting

Using the Subsystems

￿Standard Event Status Register

Bit 7 (weight 128) — Power-on (PON)

Figure 6-9Bits in the standard event status register

Shows that the counter’s power supply has been turned off and on (since the last time the controller read or cleared this register).

Bit 6 (weight 64)—User Request (URQ)

Shows that the user has pressed a key on the front panel of CNT-8X (except LO- CAL/PRESET). The URQ bit will be set regardless of the remote local state of the counter. The purpose of this signal is, for example, to call for the attention of the controller by generating a service request.

Bit 5 (weight 32) — Command Error (CME)

Shows that the instrument has detected a command error. This means that it has re- ceived data that violates the syntax rules for program messages.

Bit 4 (weight 16) — Execution Error (EXE)

Shows that the counter detected an error while trying to execute a command. (See ‘Error reporting’ on page 3-17.)The command is syntactically correct, but the counter cannot execute it, for example because a parameter is out of range.

Bit 3 (weight 8) — Device-dependent Error (DDE)

A device-dependent error is any device operation that did not execute properly because of some internal condition, for instance error queue overflow. This bit shows that the error was not a command, query or execution error.

Bit 2 (weight 4) — Query Error (QYE)

The output queue control detects query er- rors. For example the QYE bit shows the unterminated, interrupted, and deadlock conditions. For more details, see ‘Error re- porting’ on page 3-17.

Bit 1 (weight 2)—Request Control (RQC)

Shows the controller that the device wants to become the active control- ler-in-charge. Not used in the CNT-8X.

Bit 0 (weight 1) — Operation Complete (OPC)

The counter only sets this bit TRUE in re- sponse to the operation complete com- mand (*OPC). It shows that the counter has completed all previously started ac- tions.

￿Summary, Standard Event Status Reporting

*ESE <bit mask>

Enable reporting of Standard Event Sta- tus in the status byte.

*SRE 32

Enable SRQ when the Standard Event structure has something to report.

Status Subsystem 6-21