Agilent 4155C/4156C SCPI Command Reference, Edition 1 3-7
Status Reporting Structure
Standard Event Status Register
Table 3-2 Standard Event Status Register
Bit Definition Explanation
0 Operation Complete
(OPC)
This event bit has meaning only if a request to
monitor is set by the *OPC command. Refer to
"*OPC" earlier in this chapter. This bit is set to
1 if there are no pending operations.
1 Request Control
(RQC)
This event bit indicates to the controller that
instrument is requesting permission to become
the active controller-in-charge.
2 Query Error (QYE) • An attempt is being made to read data
from the Output Queue when no data is
present or pending.
• Data in the Output Queue has been lost.
3 Device Dependent
Error (DDE)
This event bit indicates that an error has
occurred which is neither a Command Error, a
Query Error, or an Execution Error.
4 Execution Error
(EXE)
Syntax of command is correct, but cannot be
executed due to some condition of instrument.
5 Command Error
(CME)
A command syntax error has been detected.
6 Not Used Always 0.
7 Power On (PON) This event bit indicates that an off-to-on
transition has occurred in instrument's power
supply.
8 to 15 Reserved Always 0.
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