[Dsg-hallc_controls] PLC Resets

[Brian Eng]

Since HX & Q1 were replaced on 7/13 it is a good sign they haven't had any problems since then.

Interesting that there were so many problems in April.

Work plan seems reasonable for testing the NMR. I did notice that the automatic setting of RF pulse parameters didn't work the last time the magnet was at higher field. So far I've only been able to get a lock by manually searching for the field. We'll know more when we can ramp the magnet ourselves.

(approx) fields I'd like to try:
1.1 (near min value for probe)
1.2 (min field I've seen it get a lock)
1.6 (highest I've seen it automatically get a lock)
1.8 (highest I've manually gotten a lock)
Max field
Any missing fields/gaps on existing probes

----- Original Message -----
> From: "Steve Lassiter" <lassiter at jlab.org>
> To: "Brian Eng" <beng at jlab.org>, "dsg-hallc controls" <dsg-hallc_controls at jlab.org>
> Sent: Thursday, November 15, 2018 10:40:07 AM
> Subject: Re: [Dsg-hallc_controls] PLC Resets

> Hi,
> 
> The SHMS Q2 control net module required a power cycle on 11-14-18.
> No other control net or Ethernet modules faulted during this time. It is another
> data point
> 
> Feb 06 2018 SHMS Dipole Control Net faulted result = crashed cryo to quench back
> at high current
> April 02 2018 SHMS HX Control Net faulted result = no adverse effects
> April 10 2018 SHMS Q2 Control Net faulted result = crashed cryo due to quench
> back at high current
> April 21 2018 SHMS Q1 Control Net faulted result = no adverse effects
> April 28 2018 SHMS Q3 Control Net faulted result = no adverse effects
> Nov 14 2018 SHMS Q2 Control Net faulted result = no adverse effects
> 
> The Control net module for the SHMS HB has not faulted as of yet.
> The Ethernet modules have not faulted as of yet either.
> But, dose accumulation is building.
> I plan to power cycle all the Net modules after thanksgiving.
> Attached is a proposed work plan for that time period. Please review and comment
> on it.
> 
> thanks
> Steven
> 
> 
> 
> ----- Original Message -----
> 
> From: "Brian Eng" <beng at jlab.org>
> To: "dsg-hallc controls" <dsg-hallc_controls at jlab.org>
> Sent: Thursday, November 15, 2018 10:27:16 AM
> Subject: [Dsg-hallc_controls] PLC Resets
> 
> Hi Steve,
> 
> I saw some recent log entries about power cycling the SHMS remote chassis, in
> particular Q2.
> 
> Do you think this is related to ControlNet vs Ethernet? Has Q1 & HX been working
> okay?