[Dsg-hallb_magnets] 2/21 Controlled Ramp

[Nicholas Sandoval]

Hi Brian,


If we could zoom in close enough and had the resolution during the period in question (14:48:24 to 14:49:34) the DP value was bouncing back and forth between the 55 PSI threshold.  Also we have a 3 second timer on this interlock.  Since the transducers reside on the Solenoid it would have the best update time, the solenoid performs the DP subtraction only in the interlock routine, then the produced routine has to apply it to the PV array, finally Torus has to consume the updated PV then process it in it's interlock routine.  We probably hit it right on the nose for the Torus and then the Solenoid was allowed to flounder back n forth before finally going.  Sol Valve PID's, Sol heater PIDs, Torus PID's, etc all contribute to the varying update time.


-Nick



________________________________
From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of Amrit Yegneswaran <yeg at jlab.org>
Sent: Thursday, February 21, 2019 7:12 PM
To: Brian Eng; dsg-hallb magnets
Subject: Re: [Dsg-hallb_magnets] 2/21 Controlled Ramp

the 70 s could be due to transit time/ trip initiation latency (solenoid takes more time to ack. flipped bit)... etc.
i guess relief valve installation is in the event horizon upcoming down time.

________________________________
From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of Brian Eng <beng at jlab.org>
Sent: Thursday, February 21, 2019 4:49 PM
To: dsg-hallb magnets
Subject: [Dsg-hallb_magnets] 2/21 Controlled Ramp

Regarding the ramp today: https://logbooks.jlab.org/entry/3657129

Any ideas on why the Torus went at 14:48:24 vs the Solenoid at 14:49:34 since they should be using the same tags/values?

Also, if the flow was actually bad (according to the MPS) shouldn't we have seen the flow bit on the MPS trip?

[cid:04CBC1E1-F5DA-4197-89E1-68627AF31039 at jlab.org][cid:5C9F5D4C-894F-4BC5-AE36-A68A6F8580C1 at jlab.org]
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