https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/INSTRM-58 Instrument control development <p>During normal operation, when we want to close the gatevalve and then open it again, we cannot do it directly but we need to make a power cycle of interlock before.</p> INSTRM-58

[xcuActor] Gatevalve normal operation is "blocked" by interlock

Task Normal Won't Fix Won't Fix cloomis fmadec SM1 Tue, 27 Dec 2016 01:02:16 +0000 Wed, 15 May 2019 16:36:31 +0000 Wed, 15 May 2019 16:36:31 +0000 ics_xcuActor 0 2 <p>It happened again this week, here what we have done:</p> <ol> <li>close the gatevalve</li> <li>stop the turbo</li> <li>stop the roughing</li> <li>put the cryostat and the roughing back to atmosphere</li> <li>restart the roughing</li> </ol> <p>Then we wanted to restart the pump down so we needed to open the gatevalve. <br/> But we couldn't do it, so I've power cycle the interlock and then it worked.</p> <p>Is that a normal behaviour ? If the pressure is at atmosphere in the cryostat, we shouldn't have an interlock right ?</p> <p>Are you describing a logic or a physical problem? If the cryostat is at atmosphere and the roughing line is pumped down, the gate valve will not and should not open.</p> <p>I belatedly looked at the logs. I had hoped for a user error (sorry!), but we do need to try to duplicate this at JHU: the behavior is wrong. Specifically, the gatevalve was closed before the turbo was stopped. Having the gatevalve open when the turbo spins down through 75% is the only thing (besides pulling the jumper) which should trigger the interlock. <a href="https://pfspipe.ipmu.jp/jira/secure/ViewProfile.jspa?name=shope" class="user-hover" rel="shope">shope</a> <span class="error">&#91;This was on r0, BTW: the thermal cryostat&#93;</span></p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>2017-05-16 13:31:37.487Z cmds 20 Actor.py:425 new cmd: gatevalve open 2017-05-16 13:31:37.520Z root 20 gatevalve.py:85 port 0 read: 0xf2 2017-05-16 13:31:37.520Z cmds 20 CommandLink.py:118 &gt; 2 99 i gatevalve=0xf2,closed,closed 2017-05-16 13:31:37.521Z root 20 gatevalve.py:64 port 0 read: 0xf2 2017-05-16 13:31:37.521Z root 20 gatevalve.py:64 setting port 0 to 0x08 2017-05-16 13:31:37.522Z root 20 gatevalve.py:64 port 0 read: 0xfa 2017-05-16 13:31:37.522Z root 20 gatevalve.py:85 port 0 read: 0xfa 2017-05-16 13:31:37.522Z cmds 20 CommandLink.py:118 &gt; 2 99 i gatevalve=0xfa,closed,blocked </pre> </div></div> <p>That said, any new xcuActor (1.7.11+) would have rejected your request: with the roughing pump on and the cryostat at atmosphere the pressure differential across the valve would be too high. </p> <p>New interlock board will address latching logic.</p> Relates INSTRM-406 Development Rank 0|s001rz:c06 Story Points 2.0