Siemens PLC Controller completed - Page 3

Squiddy · 11/23/2006, 10:21 AM

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.

easttn · 12/13/2006, 07:46 PM

Bean,
Clear your email.

GreshamH · 12/20/2006, 02:44 AM

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

Squiddy · 12/20/2006, 09:52 AM

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.

Sparkss · 01/26/2007, 08:15 PM

over a month now... any updates ?

GreshamH · 01/30/2007, 11:57 AM

Glad to see your on my case Tom

No updates, but I may have one soooooon

Sparkss · 01/30/2007, 12:25 PM

tick tock Gresh

Icefire · 02/01/2007, 05:18 AM

Starting mine this week with a GE 90 Micro PLC.
How the Panel communicate with your PLC?

easttn · 02/01/2007, 04:28 PM

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.

GreshamH · 02/01/2007, 04:28 PM

The touch screen?

easttn · 02/01/2007, 04:32 PM

Its an eye test.

Seriously, if you ned it I'll post as a PDF. Gresh, how are you doing my RC friend.
Chaz

Icefire · 02/01/2007, 04:33 PM

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.

BeanAnimal · 02/01/2007, 05:15 PM

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.

Icefire · 02/01/2007, 05:42 PM

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

Icefire · 02/01/2007, 07:03 PM

With an LM324 op amp it's worst

BeanAnimal · 02/01/2007, 07:19 PM

?

Icefire · 02/01/2007, 09:02 PM

With a non-inverting gain of 10, I get 2.546 volts but the PLC's value fluctuate +-0.2V.

Icefire · 02/02/2007, 12:06 AM

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

easttn · 02/02/2007, 07:45 AM

Icefire,

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

BeanAnimal · 02/02/2007, 10:16 AM

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.

GreshamH · 02/02/2007, 11:04 AM

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

Icefire · 02/02/2007, 11:06 AM

Bean I was using LM324.

best49erfan · 12/10/2007, 06:03 AM

Gesh,
for your actuators, or the motor driven or pneumatic?

GreshamH · 02/28/2008, 12:20 PM

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

GreshamH · 02/28/2008, 12:21 PM

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.

12/13/2006, 07:46 PM	#52
easttn Premium Member Join Date: Jul 2002 Location: East TN thank God Posts: 2,423	Bean, Clear your email. __________________ 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

12/20/2006, 02:44 AM	#53
GreshamH Registered Member Join Date: Nov 2002 Location: SF Bay Area, CA Posts: 9,474	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 __________________ Gresham _______________________________ Feeding your reef...one polyp at a time

01/26/2007, 08:15 PM	#55
Sparkss Registered Member Join Date: Feb 2005 Location: Oakley (94561) Posts: 5,030	over a month now... any updates ? __________________ - Tom Current Tank Info: 380 starfire inwall ,two 150g sump/fuge. Volcano Ca RX, ato, 6' Volcano skimmer. LAIIIs w/400w AquaConnect 14K on IC EBallasts

01/30/2007, 11:57 AM	#56
GreshamH Registered Member Join Date: Nov 2002 Location: SF Bay Area, CA Posts: 9,474	Glad to see your on my case Tom No updates, but I may have one soooooon __________________ Gresham _______________________________ Feeding your reef...one polyp at a time

01/30/2007, 12:25 PM	#57
Sparkss Registered Member Join Date: Feb 2005 Location: Oakley (94561) Posts: 5,030	tick tock Gresh __________________ - Tom Current Tank Info: 380 starfire inwall ,two 150g sump/fuge. Volcano Ca RX, ato, 6' Volcano skimmer. LAIIIs w/400w AquaConnect 14K on IC EBallasts

11/23/2006, 10:21 AM	#51
Squiddy Premium Member Join Date: Feb 2005 Location: Fort St John, BC, Canada Posts: 66	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.

12/20/2006, 09:52 AM	#54
Squiddy Premium Member Join Date: Feb 2005 Location: Fort St John, BC, Canada Posts: 66	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.

02/01/2007, 05:18 AM	#58
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	Starting mine this week with a GE 90 Micro PLC. How the Panel communicate with your PLC? __________________ 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

02/01/2007, 04:28 PM	#59
easttn Premium Member Join Date: Jul 2002 Location: East TN thank God Posts: 2,423	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. __________________ 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

02/01/2007, 04:28 PM	#60
GreshamH Registered Member Join Date: Nov 2002 Location: SF Bay Area, CA Posts: 9,474	The touch screen? __________________ Gresham _______________________________ Feeding your reef...one polyp at a time

02/01/2007, 04:32 PM	#61
easttn Premium Member Join Date: Jul 2002 Location: East TN thank God Posts: 2,423	Its an eye test. Seriously, if you ned it I'll post as a PDF. Gresh, how are you doing my RC friend. Chaz __________________ 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

02/01/2007, 04:33 PM	#62
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	Nice. I have setup a 5$ 0.2C 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. __________________ 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

02/01/2007, 05:15 PM	#63
BeanAnimal Registered Member Join Date: Feb 2003 Location: Pittsburgh Posts: 20,772	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.

02/01/2007, 05:42 PM	#64
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	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 __________________ 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

02/01/2007, 07:03 PM	#65
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	With an LM324 op amp it's worst __________________ 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

02/01/2007, 07:19 PM	#66
BeanAnimal Registered Member Join Date: Feb 2003 Location: Pittsburgh Posts: 20,772	?

02/01/2007, 09:02 PM	#67
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	With a non-inverting gain of 10, I get 2.546 volts but the PLC's value fluctuate +-0.2V. __________________ 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

02/02/2007, 12:06 AM	#68
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	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 (10C) to 0.5V (50C) converted to 4-20ma. I can set the range I want with the resistor __________________ 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

02/02/2007, 07:45 AM	#69
easttn Premium Member Join Date: Jul 2002 Location: East TN thank God Posts: 2,423	Icefire, Are you using Thermocouples or RTD, if RTD how many wires? Nice link thanks. __________________ 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

02/02/2007, 10:16 AM	#70
BeanAnimal Registered Member Join Date: Feb 2003 Location: Pittsburgh Posts: 20,772	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.

02/02/2007, 11:06 AM	#72
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	Bean I was using LM324. __________________ 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

12/10/2007, 06:03 AM	#73
best49erfan Registered Member Join Date: Nov 2007 Location: Warrenville, SC Posts: 15	Gesh, for your actuators, or the motor driven or pneumatic?

02/28/2008, 12:20 PM	#74
GreshamH Registered Member Join Date: Nov 2002 Location: SF Bay Area, CA Posts: 9,474	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 __________________ Gresham _______________________________ Feeding your reef...one polyp at a time

02/28/2008, 12:21 PM	#75
GreshamH Registered Member Join Date: Nov 2002 Location: SF Bay Area, CA Posts: 9,474	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. __________________ Gresham _______________________________ Feeding your reef...one polyp at a time