16
Standard Event Status Byte
bit name
usage
0 unused
1unused
2 Query Error set by an output queue
overflow
3 Recall Err set if a stored setting is
corrupt
4 Execution Err set by an out of range
parameter, or non-
completion of some
command due to a condition
like overload
5 Command Err set by a command syntax
error or unrecognized
command.
6 URQ set by any key press
7 PON set by power on
This status byte is defined by IEEE-488.2 (1987)
and is used primarily to report errors in commands
received over the communications interfaces. The
bits in this register stay set once set and are cleared
by reading them or by the *CLS command. If a bit
in the standard status register is set and the
corresponding bit in the standard status enable
register is set, then the ESB bit in the serial poll
register is set.
GPIB Error Messages
The following error messages will appear on the
middle display if an error occurs due to a command
sent over GPIB:
Err6 Syntax Error over GPIB.
The command had an error in syntax or
was unrecognizable. A syntax error could
be a misspelling of a command or
forgetting to include a '-' when setting a
negative value for the voltage or voltage
limit. This error is the same as Command
Error, bit 5 of the Standard Event Status
Byte.
Err7 Illegal Parameter entered over GPIB.
A parameter was set out of range, or a
command could not be completed because
of an overload. This error is the same as
Execution Err, bit 4 of the Standard Event
Status Byte.
Err 8 GPIB Output Queue full.
The output queue overflowed and was
cleared. This could be due to querying the
unit repeatedly and not reading out all of
the characters, or a problem at the
recieving unit. This error is the same as
Query Error, bit 2 of the Standard Event
Status Byte.
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