Keithley 6482 - Eliminating Common SCPI Errors

6482-901-01 Rev. A / August 2012 Return to Section Topics A-7
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Appendix A: Status and Error Messages
Eliminating common SCPI errors
There are three SCPI errors that occur more often than any others:
• -113, Undefined header
• -410, Query INTERRUPTED
• -420, Query UNTERMINATED
The following paragraphs discuss the causes for these errors and methods for avoiding them.
-113, Undefined header
This error indicates that the command you sent to the instrument did not contain a recognizable
command name. The most likely causes for this error are:
• Missing space between the command and its parameter: There must be one or more
spaces (blanks) between the command and its parameter. For example:
:SENS1:CURR:RANG2e3Incorrect (no space between command and parameter)
:SENS1:CURR:RANG 2e3Correct
• Improper short or long form: Check the command list in Section 16 for the correct command
name.
• Blanks (spaces) within the command name: For example:
:SYST :ERR? Incorrect (space between :SYST and :ERR?)
:SYST:ERR? Correct
- 410, Query INTERRUPTED
This error occurs when you have sent a valid query to the instrument, and then send it to another
command or query, or a Group Execute Trigger (GET) before it has had a chance to send the
entire response message (including the line-feed/EOI terminator). The most likely causes are:
• Sending a query to the instrument and then sending another command or query before
reading the response to the first query: For example, the following sequence of commands
will cause an error -410:
:SYST:ERR?
*OPC?
This sequence generates an error because you must read the response to :SYST:ERR?
before sending the *OPC? query.
• Incorrectly configured IEEE-488 driver: The driver must be configured so that when talking
on the bus it sends line-feed with EOI as the terminator, and when listening on the bus it
Number Error message Event
1
Status register
2
Bit
+822
+824
+830
+900
Too small for sense range
Cannot exceed compliance range
Invalid with INF ARM:COUNT
Internal System Error
EE
EE
EE
EE
Standard Event
Standard Event
Standard Event
Standard Event
4
4
4
3
Table A-1 (cont.)
Status and error messages
1
EE = Error Event, SE = Status Event, SYS = System Error Event
2
Use following queries to read status registers:
Standard Event: *ESR?
Operation Event: STAT:OPER?
Measurement Event: STAT:MEAS?
Questionable Event: STAT:QUES?