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IEEE-488.2 Common Commands 15
*ESR?
U3606A Programmer’s Reference 323
*ESR?
Syntax
*ESR?
The
*ESR?
(Event Status Register) query reads the event register for the
Standard Event register group and returns a decimal value which
corresponds to the binary- weighted sum of all bits set in the event
register (
Table 15- 1 on page 321 ). For example, if bit 0
(decimal value = 1) and bit 4 (decimal value = 16) are set (and the
corresponding bits are enabled), this query returns the decimal value
“
+17
”.
Remarks
• An event register latches the various events from the condition register.
There is no buffering in this register; while an event bit is set,
subsequent events corresponding to that bit are ignored. This is a
read- only register.
• The
*CLS
(clear status) command will clear all bits in the event
register.
• Refer to Figure 1- 1 on page 13 for the status system diagram.
Example
N O T E
This is a read-only register and the bits are cleared when you read the
register. For more information on the bit definitions of the Standard Event
register and the SCPI status diagram, see
“SCPI Status System” on
page 12 .
&
*ESR?
This command reads the event register (bits 3
and 4 are set).
$
+24