Appendix D: Status model
Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual
D-10
077114601 / March 2019
Bit
Decimal
value
Bit name
When set, indicates the following has
occurred:
0
1
Operation complete (OPC)
All pending selected device operations are
completed and the 2281S is ready to accept new
commands.
1
2
Request control (RQC). Not used.
NA
2
4
Query error (QYE)
An attempt was made to read data from an empty
output queue.
3
8
Device error (DDE)
A device error has been detected.
4
16
Execution error (EXE)
An error was detected while the instrument was
trying to execute a command.
5
32
Command error (CME)
A command error has occurred. See information
following this table for descriptions of command
errors.
6
64
User request (URQ)
An enabled summary bit of the Status Byte
Register is set; depending on how it is used, this
is either the request for service (RQS) bit or the
master summary status (MSS) bit.
7
128
Power on (PON)
The instrument has been turned off and turned
back on since the last time this register was read.
Command errors include:
IEEE Std 488.2 syntax error:
The instrument received a message that does not follow the
defined syntax of the IEEE Std 488.2 standard.
Semantic error:
The instrument received a command that was misspelled or received an
optional IEEE Std 488.2 command that is not implemented in the instrument.
GET error:
The instrument received a Group Execute Trigger (GET) inside a program message.
