Have you enabled asynTraceIODriver in the VXI11 driver to see if there is any reply? Could it be a terminator problem, though GPIB does not normally use terminators.
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Michael Davidsaver via Tech-talk
Sent: Friday, April 19, 2019 4:58 PM
To: Eric Norum <[email protected]>
Cc: EPICS Tech-Talk <[email protected]>
Subject: Re: GPIB replies lost?
"ID?" isn't a typo. The 3458A DMM doesn't quite follow the usual conventions.
I have tried "*IDN?", which the device tells me (via its front panel) is an error.
On 4/19/19 1:33 PM, Eric Norum wrote:
> My reply about a typo contained a typo. The SCPI command in question is “*IDN?”.
>
>> On Apr 19, 2019, at 1:06 PM, Michael Davidsaver via Tech-talk <[email protected]> wrote:
>>
>> All,
>>
>> I've come across a new (to me) oddity involving GPIB communication
>> between a Keysight/Agilent E5810A GPIB to ethernet bridge, and a
>> Keysight/Agilent/HP 3458A DMM. I'm contacting Keysight support, but
>> thought I'd see if someone had already run across this issue.
>>
>>
>> It appears that the DMM is receiving commands which I send.
>> "BEEP" makes the DMM beep. If I send an invalid command I can read
>> the error message through its front panel.
>> However, valid commands which should send a reply (eg. "ID?") don't
>> trigger an error, but also timeout without sending back any reply string.
>>
>> I see the same behavior with a second 3458A. Also when sending
>> commands directly through the embedded web server in the E5810A or a python vx11 client.
>>
>> I tried two different GPIB devices (Keithley and Datron DMMs) with
>> the same E5810A and cable. Both send back replies and otherwise behave as I expect.
>>
>>
>> Thanks,
>> Michael
>>
>>
>> Also, a random fact for Friday. I was on a flight from JFK to LHR
>> which was listed as 3458 miles.
>
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