[PSUBS-MAILIST] PLC input question

Thu Nov 3 18:54:44 EDT 2016

Hi Cliff,

You have been a busy fellow.  I am most impressed.  Wish you were on my project.

Cheers  Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Cliff Redus via Personal_Submersibles
Sent: Friday, 4 November 2016 10:57 AM
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] PLC input question

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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