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<div class="moz-cite-prefix">>>>the operator inputs an
I_target value and then selects to start regulation, the I_target
value will be stored as Last_I_sent<br>
<br>
Perhaps I am missing the code where start regulation triggers
where Last_I_Sent is made equal to I_target.<br>
<br>
Mike<br>
<br>
<br>
<br>
<br>
<br>
On 9/28/2018 3:02 PM, Amanda Hoebel wrote:<br>
</div>
<blockquote type="cite"
cite="mid:662426473.30430128.1538161322591.JavaMail.zimbra@jlab.org">
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<div style="font-family: arial, helvetica, sans-serif; font-size:
12pt; color: #000000">
<div>If the operator inputs an I_target value and then selects
to start regulation, the I_target value will be stored as
Last_I_sent (on the function block diagram). On the ladder
logic, I_coarse is basically being compared to I_target, since
I_target and Last_I_sent would be the same value. The program
would still work with the PSU starting from zero.<br>
</div>
<div><br>
</div>
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>From: </b>"Mike Fowler"
<a class="moz-txt-link-rfc2396E" href="mailto:fowler@jlab.org"><fowler@jlab.org></a><br>
<b>To: </b>"dsg-hallc controls"
<a class="moz-txt-link-rfc2396E" href="mailto:dsg-hallc_controls@jlab.org"><dsg-hallc_controls@jlab.org></a><br>
<b>Sent: </b>Friday, September 28, 2018 2:28:11 PM<br>
<b>Subject: </b>Re: [Dsg-hallc_controls] Quadrupole field
regulation<br>
</div>
<div><br>
</div>
<div data-marker="__QUOTED_TEXT__">
<div class="moz-cite-prefix">Condition one: PSU starting from
zero<br>
<br>
Operator> Inputs an I_target and I_MOL value.<br>
PLC> Checks I_target if in limits, sets the MPS_Wa_Value<br>
Operator> Start regulation<br>
PLC> Compares analog I_coarse to Last_I_Sent which is
assumed to be zero.<br>
If I_coarse > Last_I_Sent the code sends
MPS_Wa_Value to PSU. Note: analog I_coarse value could be
non zero and the MOL value is not sent.<br>
PLC> Waits for I_coarse to be equal to MOL value +/-1%.
Was the MOL value ever sent?<br>
<br>
Mike<br>
<br>
<br>
<br>
<br>
<br>
On 9/28/2018 2:00 PM, Amanda Hoebel wrote:<br>
</div>
<blockquote
cite="mid:1519482268.29539666.1538157629217.JavaMail.zimbra@jlab.org">
<div style="font-family: arial, helvetica, sans-serif;
font-size: 12pt; color: #000000">
<div>The operator would input an I_target and I_MOL value,
then select to start regulation.<br>
</div>
<div><br>
</div>
<div><br>
</div>
<hr id="zwchr">
<div><b>From: </b>"Mike Fowler" <a
class="moz-txt-link-rfc2396E"
href="mailto:fowler@jlab.org" target="_blank"
moz-do-not-send="true"><fowler@jlab.org></a><br>
<b>To: </b>"dsg-hallc controls" <a
class="moz-txt-link-rfc2396E"
href="mailto:dsg-hallc_controls@jlab.org"
target="_blank" moz-do-not-send="true"><dsg-hallc_controls@jlab.org></a><br>
<b>Sent: </b>Friday, September 28, 2018 1:54:31 PM<br>
<b>Subject: </b>Re: [Dsg-hallc_controls] Quadrupole
field regulation<br>
</div>
<div><br>
</div>
<div>
<div class="moz-cite-prefix"><br>
Hi,<br>
<br>
What is the sequence of inputs from the operator?<br>
<br>
Mike<br>
<br>
<br>
<br>
On 9/28/2018 1:30 PM, Amanda Hoebel wrote:<br>
</div>
<blockquote
cite="mid:1323893506.29082462.1538155802191.JavaMail.zimbra@jlab.org">
<div style="font-family: arial, helvetica, sans-serif;
font-size: 12pt; color: #000000">
<div>
<div style="font-family: arial, helvetica,
sans-serif; font-size: 12pt; color: #000000">
<div>Hi Mike,<br>
</div>
<br>
<div>I have some questions/comments (in blue) on
some of your comments for the current loop
regulation.<br>
</div>
<br>
<div>4. If the analog signal I_coarse is less
than the Last_I_Sent by even a small fraction
the MOL value is used.<br>
</div>
<div><span style="color: rgb(0, 0, 255);">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?</span><br>
</div>
<br>
<div>7. Consider this:<br style="">
If I_coarse is equal to Last_I_Sent +/- a few
amps<br style="">
true, MPS is at setpoint<br style="">
false, The MPS is still ramping, something
happened, or the MPS tripped and the
Last_I_Sent was not updated. (Interlock?)<br
style="">
or the window is too small.
Determine what to do.</div>
<div><span style="color: rgb(0, 0, 255);">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).</span><br>
</div>
<br>
<div>8. Compare Q1_I_Target to Last_I_Sent to
determine ramp direction instead of the analog
I_coarse.</div>
<div><span style="color: rgb(0, 0, 255);">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.</span><br>
</div>
<div><span style="color: rgb(0, 0, 255);"><br>
</span></div>
<div><span style="color: rgb(0, 0, 0);">Regards,<br>
</span></div>
<div><span style="color: rgb(0, 0, 0);">Amanda<br>
</span></div>
<br>
<hr id="zwchr">
<div><b>From: </b>"Amanda Hoebel" <a
class="moz-txt-link-rfc2396E"
href="mailto:amandah@jlab.org"
target="_blank" moz-do-not-send="true"><amandah@jlab.org></a><br>
<b>Sent: </b>Wednesday, September 26, 2018
10:04:46 AM<br>
<b>Subject: </b>Re: [Dsg-hallc_controls]
Quadrupole field regulation<br>
</div>
<br>
<div>
<div style="font-family: arial, helvetica,
sans-serif; font-size: 12pt; color: #000000">
<div>
<div style="font-family: arial, helvetica,
sans-serif; font-size: 12pt; color:
#000000"><br>
<hr id="zwchr">
<div><b>From: </b>"Mike Fowler" <a
class="moz-txt-link-rfc2396E"
href="mailto:fowler@jlab.org"
target="_blank"
moz-do-not-send="true"><fowler@jlab.org></a><br>
<b>To: </b>"dsg-hallc controls" <a
class="moz-txt-link-rfc2396E"
href="mailto:dsg-hallc_controls@jlab.org"
target="_blank"
moz-do-not-send="true"><dsg-hallc_controls@jlab.org></a><br>
<b>Sent: </b>Tuesday, September 25,
2018 10:37:25 AM<br>
<b>Subject: </b>Re:
[Dsg-hallc_controls] Quadrupole field
regulation<br>
</div>
<br>
<div>
<div class="moz-cite-prefix">Hi,<br>
<br>
Comments.<br>
<br>
The ability to manually input a
current and send it without a MOL
value has been removed. <br>
Must be included.<br>
<br>
Cheers,<br>
Mike<br>
<br>
<br>
<br>
On 9/20/2018 9:12 AM, Amanda Hoebel
wrote:<br>
</div>
<blockquote
cite="mid:59817053.2238488.1537449142333.JavaMail.zimbra@jlab.org">
<div style="font-family: arial,
helvetica, sans-serif; font-size:
12pt; color: #000000">
<div>Hi Mike,<br>
</div>
<div><br>
</div>
<div>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.<br>
</div>
<div><br>
</div>
<div>Regards,<br>
</div>
<div>Amanda<br>
</div>
</div>
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