[Dsg-hallc_controls] Quadrupole field regulation

[Mike Fowler]

Hi,

What is the sequence of inputs from the operator?

Mike



On 9/28/2018 1:30 PM, Amanda Hoebel wrote:
> Hi Mike,
>
> I have some questions/comments (in blue) on some of your comments for 
> the current loop regulation.
>
> 4. If the analog signal I_coarse is less than the Last_I_Sent by even 
> a small fraction the MOL value is used.
> Yes, as the PSU would be ramping up, even if it's by a small amount. 
> This would only occur if someone were to set an I_target/Last_I_Sent 
> value that was very close to what the power supply was already at. If 
> that is not the correct method, what should be done instead?
>
> 7. Consider this:
> If I_coarse is equal to Last_I_Sent +/- a few amps
>     true, MPS is at setpoint
>     false, The MPS is still ramping, something happened, or the MPS 
> tripped and the Last_I_Sent was not updated. (Interlock?)
>             or the window is too small. Determine what to do.
> I am unsure of what you are suggesting. I will implement a condition 
> where the loop stops if there is an interlock (as per comment #1) and 
> can add a case where the program continues to the next rung if the 
> PSU_Ready is True, in the event that the window is too small. Any 
> other problem that could arise seems like it would be related to the 
> PSU itself, not the program. The program does not ramp the PSU and 
> stop ramp only if the current falls within the window. The PSU will 
> stop at the set point given (no runaway condition possible).
>
> 8. Compare Q1_I_Target to Last_I_Sent to determine ramp direction 
> instead of the analog I_coarse.
> Q1_I_Target and Last_I_Sent cannot be compared for ramp direction, as 
> they will be the same value as each other on the ladder logic when the 
> regulation routine is enabled.
>
> Regards,
> Amanda
>
> ------------------------------------------------------------------------
> *From: *"Amanda Hoebel" <amandah at jlab.org>
> *Sent: *Wednesday, September 26, 2018 10:04:46 AM
> *Subject: *Re: [Dsg-hallc_controls] Quadrupole field regulation
>
>
> ------------------------------------------------------------------------
> *From: *"Mike Fowler" <fowler at jlab.org>
> *To: *"dsg-hallc controls" <dsg-hallc_controls at jlab.org>
> *Sent: *Tuesday, September 25, 2018 10:37:25 AM
> *Subject: *Re: [Dsg-hallc_controls] Quadrupole field regulation
>
> Hi,
>
> Comments.
>
> The ability to manually input a current and send it without a MOL 
> value has been removed.
> Must be included.
>
> Cheers,
> Mike
>
>
>
> On 9/20/2018 9:12 AM, Amanda Hoebel wrote:
>
>     Hi Mike,
>
>     I have attached pdfs of the field regulation routine for HMS Q1. 
>     If this is correct I will make the routines for HMS Q2 and Q3, and
>     for the quads in SHMS.
>
>     Regards,
>     Amanda
>
>
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