Bristol 428 - Page 60

Model 428 User’s Manual REMOTE COMMUNICATIONS
Bristol Instruments, Inc. 60
SYSTem Subsystem
The SYSTem subsystem { XE “Commands:SYSTem” } supplies information and status
about the SCPI command parser.
SYSTem Subsystem Functions
:ERRor?
Description
Reads error strings from the SCPI Error Queue. If the Error Queue has
any entries, the Error Queue bit is set in the Status Byte. The instrument
has a 30 entry, first-in, first-out queue. Repeatedly sending the query
:SYST:ERR? returns the error numbers and descriptions in the order in
which they occurred until the queue is empty. Any further queries return
0, "No error" until another error occurs. A table of possible errors is
shown below.
Query Response
<integer>, <string> (e.g., –104, “Data type error”)
Examples
:SYST:ERR?
SCPI Errors
ERROR NUMBER
DESCRIPTION
0
No error
-101
Invalid character
-102
Syntax error
-103
Invalid separator
-104
Data type error
-220
Parameter error
-221
Settings conflict
-222
Data out of range
-230
Data corrupt or stale
:HELP:HEADers?
Description
Reads a list of all commands and queries supported by the instrument.
Each line of the response is terminated by a linefeed. The first line
indicates the number of bytes of help data that follow. The remaining
lines are strings of help data. All lines of data must be read before
continuing normal operations.
Query Response
#<integer>
<string>
<string>
<string>
...
<string>
Examples
:SYST:HELP:HEAD?