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Old 11/23/2006, 10:21 AM   #51
Squiddy
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Nooo you can't give up! Look what I'm playing with today:



Couldn't find float switches anywhere so I'm using this... a vibrating level sensor from Endress & Hauser.

I'm using a Modicon Micro PLC that has 24 I/O and 10-12 analog I/O.



Have built a HMI using Labview but might go to using some kind of SCADA software instead. All good fun!

Just looking for a nice sealed enclosure for the PLC, relays and I/O strips... something that has a window in it. Anyways, will keep you guys updated.


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Old 12/13/2006, 07:46 PM   #52
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Bean,
Clear your email.


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HONOR.......Simply put, A VETERAN - whether Active Duty, Retired, National Guard or Reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "Up to and including my life." That is HONOR, and there are way too many people in this country who no longer understand that. --Author Unknown--

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Old 12/20/2006, 02:44 AM   #53
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Ok, a new job description and no graphics/ads to produce, so I have time and resources to resume this project. I need to update the program though, I have two 18" linear actuators to raise my canopy, as well as my lighting rig I want to change the height the lights are thru out the day. I also want to ad the Canopy door actuator to the "too hot" alarm (to raise the doors).

Even though I have the tank for this, I'm getting a new one made from a better company. THe owner is giving me a screaming deal. Guess I'll have two 5'x4'x16" eurobraced acrylic tanks Maybe one will turn into the new Reef Nutrition test tank at work


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Old 12/20/2006, 09:52 AM   #54
Squiddy
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Good to see someone else back at it! I need to take some pictures of my setup now. Got the ventilation fans installed last night and it's all coming together.


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Old 01/26/2007, 08:15 PM   #55
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over a month now... any updates ?


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Old 01/30/2007, 11:57 AM   #56
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Glad to see your on my case Tom

No updates, but I may have one soooooon


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Old 01/30/2007, 12:25 PM   #57
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tick tock Gresh


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Old 02/01/2007, 05:18 AM   #58
Icefire
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Starting mine this week with a GE 90 Micro PLC.
How the Panel communicate with your PLC?


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Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 02/01/2007, 04:28 PM   #59
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standard db9 cable. Only need 4 wires though Tx, Rx, Gnd, and power.

Here is the symbol table. (Mods this is not any propritery s/w it's just the I/O assignments). To help others with address assignments for PLCs.




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HONOR.......Simply put, A VETERAN - whether Active Duty, Retired, National Guard or Reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "Up to and including my life." That is HONOR, and there are way too many people in this country who no longer understand that. --Author Unknown--

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Old 02/01/2007, 04:28 PM   #60
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The touch screen?


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Old 02/01/2007, 04:32 PM   #61
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Its an eye test. Seriously, if you ned it I'll post as a PDF. Gresh, how are you doing my RC friend.
Chaz


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HONOR.......Simply put, A VETERAN - whether Active Duty, Retired, National Guard or Reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "Up to and including my life." That is HONOR, and there are way too many people in this country who no longer understand that. --Author Unknown--

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Old 02/01/2007, 04:33 PM   #62
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Nice.

I have setup a 5$ 0.2*C accuracy probe (lm35 chip) which give 10mV/*C

Problem is my PLC is 0-10V with 10mV accuraccy. Any way to have my probe output multiplied by 10? That would give me 0.1*C resolution on my PLC.


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Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT
Lights @ 100% all others, 35% White

Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 02/01/2007, 05:15 PM   #63
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You need an instrumentation amp... (OP-AMP) circuit or a purpose built amp. eBay is the place to look for probe amps unless you want to DIY.


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Old 02/01/2007, 05:42 PM   #64
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Yeah that's what I tought, I wanted it dead sample plug in, my probe have 3 wire. +5 - +30V, ground, output.

I'll make an opamp circuit


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Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT
Lights @ 100% all others, 35% White

Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 02/01/2007, 07:03 PM   #65
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With an LM324 op amp it's worst


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Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT
Lights @ 100% all others, 35% White

Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 02/01/2007, 07:19 PM   #66
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?


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Old 02/01/2007, 09:02 PM   #67
Icefire
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With a non-inverting gain of 10, I get 2.546 volts but the PLC's value fluctuate +-0.2V.


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Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT
Lights @ 100% all others, 35% White

Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 02/02/2007, 12:06 AM   #68
Icefire
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http://www.allaboutcircuits.com/vol_...tml/conversion

I'll try a 4-20ma transmitter. basicly using a 25 ohms resistor to set a 0.1V (10*C) to 0.5V (50*C) converted to 4-20ma.

I can set the range I want with the resistor


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Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT
Lights @ 100% all others, 35% White

Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 02/02/2007, 07:45 AM   #69
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Icefire,

Are you using Thermocouples or RTD, if RTD how many wires?
Nice link thanks.


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HONOR.......Simply put, A VETERAN - whether Active Duty, Retired, National Guard or Reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "Up to and including my life." That is HONOR, and there are way too many people in this country who no longer understand that. --Author Unknown--

Current Tank Info: Maintenance Free
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Old 02/02/2007, 10:16 AM   #70
BeanAnimal
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Yeah the op-amp circuit needs to be fairly precisse due to the impedence problems. You can use an LM-324 but the supporting circuitry has to be a bit more complex. Burr-brown makes some very nice instrumentation amps that are much better suited to the application.

There is also a good app-note on the national site regarding PH amp design. I will see if I can dig it up.


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Old 02/02/2007, 11:04 AM   #71
GreshamH
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Quote:
Originally posted by easttn
Its an eye test. Seriously, if you ned it I'll post as a PDF. Gresh, how are you doing my RC friend.
Chaz
Couldn't be better. Like you I changed jobs, and we're in similiar fields now. I left my job being Beaver Patrol, to that of Bikini Inspector. Maybe we'll see each other on the job some day

Serioulsy, I'm OK and still at Reed

I need to talk to you about this, I'm ready to get this project finished and move on to another


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Old 02/02/2007, 11:06 AM   #72
Icefire
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Bean I was using LM324.


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Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT
Lights @ 100% all others, 35% White

Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI
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Old 12/10/2007, 06:03 AM   #73
best49erfan
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Gesh,
for your actuators, or the motor driven or pneumatic?


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Old 02/28/2008, 12:20 PM   #74
GreshamH
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eeks, how'd I miss this? electric motor linear actuators.

http://www.firgelliauto.com/default.php?cPath=86

I just redisgned it though after a great post from some one here on RC. I went to one of these:

http://www.firgelliauto.com/default.php?cPath=104


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Old 02/28/2008, 12:21 PM   #75
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FWIW once again I am trying to get this one up and rolling. I hope Charles is stilla round as I need a bit of help. Chris should be hearing from me soon as well.


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