[PSUBS-MAILIST] PLC input question

Fri Nov 4 01:23:26 EDT 2016

Cliff,
thanks for the update & offer of advice on my upcoming automation choices.
That's a huge project updating K350 plans & overseeing the student build.
I know we have talked about a plan overhaul in the past. I guess the next step 
is building it & then considering the option of replacing the existing plans. 
As I remember, the current plans called for components that no longer existed,
& had a hard ballast design that would explode if it saw full tank pressure.
   Look forward to seeing a video of the R300 diving with it's new modifications.
Alan

Sent from my iPad

> On 4/11/2016, at 10:57 am, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan
> 
> Let me know when you get ready to spec the PLC/HMI, I have been really happy with the equipment I have using and can share.
> 
> Been working on two Psub projects.  The first is working with a local high school on a modified K350 build.  I spent the last two month detailing the boat with Autodesk Inventor and now have a pretty complete package of drawings and specs for a modern K-350. The original K-350 plans are fairly basic and required quite a bit of reading between the lines.  Changes I made to the original K-350 design were more battery capacity and larger and wider apart battery pods to accommodate, Minn Kota 101 based Kort thrusters like I use for my boat, and totally new electronics including PLC and HMI, full life support including BIBS and added two more viewports.  The MBT system has been totally changed.  I am using two of Hugh Fulton's pneumatic pancake style valves to blow the MBTs and am using Swagelok 3-Way valves to operate the MBT and VBT.  Team is waiting on final budget approval before we pull the trigger on the project.  Team has already received $15K in equipment donations.
> 
> On the R300, I am in the process of switching control of the compass/pitch/roll sensor which uses RS232 serial communication from  an RS232 port on the PLC base to a dedicated PLC  coprocessor.  I have had some intermittency issues with this sensor over the years and I am trying this to see if this solves the problem.  What I really need is an O Scope that has RS232 investigation feature.  With the work on the K-350 project, I have just not had any spare time on my boat.  Hope to rectify that shortly.  Got a consulting job I have to knock out next week in Oklahoma City then I am free for the rest of the year to play with psubs.
> 
> Regards
> 
> Cliff
> 
> 
>> On Thu, Nov 3, 2016 at 3:15 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Thanks Cliff,
>> no doubt I'll have more questions when I start
>> trying to nail down what PLC, HMI & software.
>> Have just ordered 2 of those digital to 0-5V converters
>> for my remote system. Will give an update on them when
>> they are up & running.
>> Anything noteworthy on your R300 modifications? (if
>> you have time for an update.)
>> Cheers Alan
>> 
>> 
>> From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org>
>> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
>> Sent: Friday, November 4, 2016 5:06 AM
>> Subject: Re: [PSUBS-MAILIST] PLC input question
>> 
>> Alan, for PLC analog input devices, normally they are either 0-5VDC, 0-10VDC or 4-20mA.  You can by analog input modules for the PLC in any of these flavors.  Most popular are 0-5VDC and 4-20mA.
>> 
>> Cliff
>> 
>> On Thu, Nov 3, 2016 at 12:06 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> What is the best sensor input to get for a PLC or doesn't it matter.
>> The pressure sensors I am coming across have either 0-5V output
>> or some amp range.
>> Wish I had heard Jon's talk at the last convention. Was that recorded?
>> Thanks
>> Alan
>> 
>> Sent from my iPad
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