6
Event Registers
Standard Event Status Register (SESR)
The Standard Event Status Register is an 8-bit register. If any bit in the Standard Event Status Register is set to 1
(after masking by the Standard Event Status Enable Register), bit 5 (ESB) of the Status Byte Register is set to 1.
See:
“Standard Event Status Register (SESR) and Standard Event Status Enable Register (SESER)” (p.7)
The Standard Event Status Register is cleared in the following situations:
• When a
*CLS
command is executed
• When an event register query (
*ESR?
) is executed
• When the instrument is powered on
Bit 7
PON
Power-On Flag
Set to 1 when the power is turned on, or upon recovery from an
outage.
Bit 6
(Unused)
URQ
User Request
Bit 5
CME
Command error (The command to the message terminator
is ignored.)
This bit is set to 1 when a received command contains a
syntactic or semantic error:
• Program header error
• Incorrect number of data parameters
• Invalid parameter format
•
Received a command not supported by the instrument
Bit 4
EXE
Execution Error
This bit is set to 1 when a received command cannot be
executed for some reason.
• The specified data value is outside of the set range
• The specified setting data cannot be set
•
Execution is prevented by some other operation being
performed
Bit 3
(Unused)
DDE
Device-Dependent Error
This bit is set to 1 when a command cannot be executed due to
some reason other than a command error, a query error or an
execution error.
Bit 2
(Unused)
QYE
Query Error (the output queue is cleared)
This bit is set to 1 when a query error is detected by the output
queue control.
• When an attempt has been made to read an empty output
queue (GP-IB only)
• When the data overflows the output queue
• When data in the output queue has been lost
• When the next command is received while there is data in the
output queue
Bit 1
(Unused)
RQC
Request Control
Bit 0
OPC
Operation Complete
This bit is set to 1 in response to an “
*
OPC
” command.
• It indicates the completion of operations of all messages up to
the “
*
OPC
” command
Summary of Contents for Super megohm SM7110
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