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Strictly speaking, no.
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<div>However, if there are sensor read back issues then it’s probably already gone into a controlled ramp.</div>
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<div>The cRIO especially handles quite a large number of sensors (all but a small handful that are readout by other hardware [e.g. the cryo-cons]) and each LV chassis also has a large number. It’s hard to say off hand which are interlocked or not.</div>
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<div>I would always play it on the safe side and ramp the magnets down such that if they do dump there isn’t any time spent waiting on cryo recovery.<br>
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<div>On Jun 10, 2024, at 4:33 PM, Eugene Pasyuk <pasyuk@jlab.org> wrote:</div>
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Thanks for taking care of this. </div>
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Just to clarify for the future, if we ever need to reset cRIO and/or LV, the magnet must be OFF, right?</div>
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<div style="margin-top: 0px; margin-bottom: 0px;"><span style="font-family: Calibri, sans-serif; font-size: 11pt;">-Eugene</span></div>
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<font face="Calibri, sans-serif" style="font-size: 11pt;"><b>From:</b><span class="Apple-converted-space"> </span>Hallb-engineering <hallb-engineering-bounces@jlab.org> on behalf of beng--- via Hallb-engineering <hallb-engineering@jlab.org><br>
<b>Sent:</b><span class="Apple-converted-space"> </span>Monday, June 10, 2024 16:15<br>
<b>To:</b><span class="Apple-converted-space"> </span>dsg-hallb_magnets@jlab.org <dsg-hallb_magnets@jlab.org>; hallb-engineering@jlab.org <hallb-engineering@jlab.org><br>
<b>Subject:</b><span class="Apple-converted-space"> </span>[Hallb-engineering] [New Logentry] Follow-up Re: Follow-up Re: TR8122A Flakey Readout</font>
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<h1 class="x_node-title" style="font-size: 1.6em;"><a href="https://logbooks.jlab.org/entry/4310411" rel="bookmark" style="text-decoration: none;">Follow-up Re: Follow-up Re: TR8122A Flakey Readout</a></h1>
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<div style="margin: 0.1em 0px; font-weight: bold; font-size: 6.154907px;">Lognumber<span class="Apple-converted-space"> </span><a href="https://logbooks.jlab.org/entry/4310411" class="x_lognumber" data-lognumber="4310411" style="text-decoration: none;">4310411</a>.
Submitted by<span class="Apple-converted-space"> </span><a href="https://logbooks.jlab.org/user/beng" style="text-decoration: none;">beng</a><span class="Apple-converted-space"> </span>on<span class="Apple-converted-space"> </span><time datetime="2024-06-10T16:14:52-0400"><a href="https://logbooks.jlab.org/entries?start_date=1718046892&end_date=1718054092&book=DSGLOG&book=HBTORUS" style="text-decoration: none;">Mon,
06/10/2024 - 16:14</a></time>.</div>
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ambrown</td>
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<a href="https://logbooks.jlab.org/entry/4308937" style="text-decoration: none;">4308937 - Follow-up Re: TR8122A Flakey Readout</a></td>
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<div style="margin-top: 0px; margin-bottom: 0px;">Tried stopping and starting the VI running on the cRIO to recover the readout. Wasn't expecting this to work (and it didn't) but this can be done remotely so it was tried first.</div>
<div style="margin-top: 0px; margin-bottom: 0px;">Next Aaron power cycled LV chassis #1 via the switch on the back of the chassis. This brought back TR8122A, but all the relief valve temperatures were bad (~30K instead of ~300K).</div>
<div style="margin-top: 0px; margin-bottom: 0px;">The VI was stopped/started again (this is the functionally the same as power cycling the cRIO itself) which recovered all the channels.</div>
<div style="margin-top: 0px; margin-bottom: 0px;">In the future to recover bad sensor readouts both the LV chassis and the cRIO should be restarted in that order: LV chassis first then cRIO last.</div>
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