Fluke PM-3394B, PM-3380B Event Status Register, 18COMMAND Reference, Response Integer Description

4 - 18COMMAND REFERENCE

*ESR?	Event Status Register
Syntax:	*ESR?
Response:	<integer>

Description:

The *ESR? query reports the contents of the standard Event Status Register (ESR) and clears it. The range of the 8-bit ESR contents is between 0 and 255 decimal.

PON URQ CME EXE DDE QYE RQC OPC

7 6 5 4 3 2 1 0

ESR

The meaning of the bits is as follows:

•bit 7: PON = Power ON

•bit 5: CME = Command Error

•bit 3: DDE = Device Dependent Error

•bit 1: RQC = Request Control

•bit 6: URQ = User Request

•bit 4: EXE = Execution Error

•bit 2: QYE = Query Error

•bit 0: OPC = Operation Complete

Notes:

-PON indicates that the power supply has been turned off and on since the last time the register was read or cleared. Bit 7 (PON) is always set true at power on.

-URQ indicates that the user has requested attention, e.g., to return the instrument to local.

-Bit 1 (RQC) is not used (always 0).

-OPC indicates that the device has completed all previously started actions.

Example:

Send → *ESR?

Read ← 28 28 is equal to the binary value #B11100 (16 + 8 + 4 decimal),which means that the bits 4 (EXE), 3 (DDE), and 2 (QYE) are set. So, an execution error, a device- dependent error and a query error have occurred since the last time the register was read.