AnsweredAssumed Answered

34401A DMM GPIB Query Failing with Error +550

Question asked by mroyer36 on Aug 4, 2016
Latest reply on Aug 4, 2016 by mroyer36

I am trying to communicate with a 34401A DMM via GPIB.  I have issued the following commands using Keysight's Interactive IO utility that is part of the Connection Expert:

-> *IDN?

<- HEWLETT-PACKARD,34401A,0,11-5-2

-> *RST

-> SYST:ERR?

<- -420,"Query UNTERMINATED"

-> :TRIG:SOUR?

<- IMM

-> :VOLT:DC:NPLC 0.02

-> SYST:ERR?

<- +0,"No error"

-> :READ?

! VI_ERROR_TMO: A timeout occurred

Visa ErrorCode: 0xBFFF0015 (-1073807339)

-> SYST:ERR?

<- +550,"Command not allowed in local"

-> SYST:ERR?

<- -420,"Query UNTERMINATED"

-> SYST:ERR?

<- +0,"No error"

-> MEAS:VOLT:DC? 10,0.003

! VI_ERROR_TMO: A timeout occurred

Visa ErrorCode: 0xBFFF0015 (-1073807339)

-> SYST:ERR?

<- +550,"Command not allowed in local"

-> SYST:ERR?

<- -420,"Query UNTERMINATED"

-> SYST:ERR?

<- +0,"No error"

Why is the 34401A failing on the READ? and MEAS? queries?  If I look up the given error (+550) in the manual, it says that error is for RS-232 communication.  The instrument is clearly connected remotely to GPIB since other commands are working properly (e.g., *IDN?).

 

Any thoughts what needs to be done here?

Outcomes