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<p style="margin-top:0;margin-bottom:0">Hello Ruben,</p>
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<p style="margin-top:0;margin-bottom:0">Redundancy PLC system for ControlLogix PLCs <span style="font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">involve </span>basically
two controllers, two redundancy modules, and two Ethernet modules. This configuration allows to the PLC system running continuously in case one of the PLC controllers fails.</p>
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<p style="margin-top:0;margin-bottom:0">There is not a redundancy capability for both magnet; actual setup for Solenoid and Torus PLCs have one PLC controller in the Local chassis, and only I/O modules in the Remote chassis. DBX PLC only has one PLC chassis
with one controller.</p>
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<p style="margin-top:0;margin-bottom:0"><span style="font-size: 12pt;">Therefore, in case of
</span><span style="font-size: 12pt;">a redundant system implantation </span><span style="font-size: 12pt;">for Solenoid and Torus magnets, it would be required: Acquisition of new PLC hardware</span><span style="font-size: 12pt;">, finding room for </span><span style="font-size: 12pt;">location
of new PLC </span><span style="font-size: 12pt;">chassis (Not available in actual control racks</span><span style="font-size: 12pt;">), and PLC re-configurations.</span><br>
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<p style="margin-top:0;margin-bottom:0">Best Regards,</p>
<p style="margin-top:0;margin-bottom:0">Pablo</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Ruben Fair<br>
<b>Sent:</b> Tuesday, February 26, 2019 9:11:07 AM<br>
<b>To:</b> Brian Eng; Nicholas Sandoval; Tyler Lemon; Pablo Campero Rojas<br>
<b>Cc:</b> Probir Ghoshal<br>
<b>Subject:</b> Hall B - PLC redundancy</font>
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<p style="margin-top:0; margin-bottom:0">Hi guys,</p>
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<p style="margin-top:0; margin-bottom:0">Dave was talking to Steve Lassiter in Hall C and apparently they use redundant PLCs there - not exactly sure what this means - do you?</p>
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<p style="margin-top:0; margin-bottom:0">Don't we use a remote and local PLC set up - does that give us any redundancy capability - to avoid the failure seen on Monday?</p>
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<p style="margin-top:0; margin-bottom:0">Steve also mentioned that if the PLC divides by zero, it crashes - could this have happened to us from the evidence (if any) that we obtained after the failure?</p>
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<p style="margin-top:0; margin-bottom:0">Regards</p>
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<p style="margin-top:0; margin-bottom:0">Ruben<br>
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