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Messages - ssiewert

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Opinions & Feedback / I2C update
« on: March 16, 2013, 07:22:02 AM »
Any news on the I2C-FRTC rollout?   I see substantial documentation for implimentation, so it must be close, no?

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Technical support / Trilogi-Printing hard copy- program title is old
« on: January 31, 2013, 03:19:47 PM »
Running the new build 4 of 6.45 on xp.   I noticed the hard copies of ladder and special functions weren't titled correctly.  It appears the title at the top of the page is the PC6 file that was last closed prior to whatever you are now commanding to print.   If you've printed hard copies recently, you might want to double check the titles or risk confusion later on (assuming this is not a problem unique to my system).

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Frequently Asked Questions / Re:Storing Web pages in Nano-10 & FMD PLCs
« on: January 24, 2013, 08:45:19 AM »
Nano-10 webpage requires the 0.htm and N.JS  (later version has been changed to M.JS). 0.htm occupies 4K, that means you can use the space from 2.xxx to L.xxx to store your JPG file. This is 20K bytes of file space which may just fit your JPEG file.

For PLC with r78 or later firmware you can use FRAM-RTC-256 to expand another 256K bytes of file space for storing webpage for used by the PLC for storing data into files.

I see, yes I had forgotten about the N file, though I knew it was there.  I understand writing it to U would not work, I was commenting that after the described sequence, I had a weird remnant file that showed up at "U".    I'll give it a try starting at "2.xxx", though when I do the math, saving it at "A" or "C" should offer plenty of space, if the slots were actually 2k each (13x2k).  
****update- success with the 16k  jpg stored at 2.jpg****

Clarification on the use of the FRAM-RTC-256. Is it only r78 and later?  Reason I ask is the Appendix A, Extended File system gives the thumbs up to r77 and later.  Has it been discovered r77 has limited functionality since 2011 when Appendix A looks like it was written?

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Technical support / Re:Nano Power Supply 12v bumped to 24v
« on: January 21, 2013, 08:08:56 PM »
Good to hear the 12 to 24 volt conversion has worked for you.  Thanks for the post.

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Technical support / Re:Nano Power Supply 12v bumped to 24v
« on: January 21, 2013, 01:51:36 PM »
A topping charge for two batteries could be 14.4 x 2 = almost 29 volts.  This wouldn't be an issue for the Nano?  I agree batteries have nice smooth power, but the Nano still has to be online when the batteries are getting recharged, so there will be voltage well over the 24+5%= 25.2v referenced in the spec.

The DC-DC power supply I mentioned is less than or equal to most the SLA batteries I'm looking at, and it would likely last longer than one battery.  There is no cost argument in favor of 24 volt that I can see.

On the Nano, 1&2 outputs sinking, 3&4 relays activated, 1-4 inputs sunk to ground, and the analogs pulling the maximum allowed, how many watts will the Nano use?  If someone doesn't recall immediately, there is design and testing notes for reference, no?

There is another reason to want everything but the Nano at 12 volts. The dc-dc power supply has a 30% loss.

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Technical support / Nano Power Supply 12v bumped to 24v
« on: January 20, 2013, 09:40:48 PM »
It would be helpful if someone had some previous experience or recommendations in bumping up the typical 12v battery to Nano needs.  11.5-13.5 volts bumped to the 24v +/-5%.  

I don't want the added complexity and expense of two batteries, and the voltage of two in series would likely be outside the 24v +5% anyway, so some kind of voltage control is necessary.

I've found the Mean Well product-SD-15A-24 which will take 9-18vdc and give the 24vdc, but I don't need the 15 watt capability.  My preference would be to size for the 100ma the Nano calls for, and everything else run at battery voltage or less. (outputs 1&2 requiring diodes as per the manual).  

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Frequently Asked Questions / Problem Storing small jpeg
« on: January 11, 2013, 11:25:36 AM »
My goal is to have the background image on the Nano so I don't need internet connection or a server of any kind for storing the background.  I've shrunk the jpeg file to under 16K, and tried storing at ip:port/a.jpg and it doesn't seem to work.  Removed file, tried then at c.jpg.   When using a browser to go to ip:port/c.jpg, I get "The image ?http://10.0.1.60:9083/c.jpg? cannot be displayed because it contains errors." in Foxfire: Safari shows nothing.  A few more clues.   The jpeg file opens fine before transfering to the Nano.  It shows it was transfered fine (all 16K or so) in Filezilla.  However, when I bring it back from the Nano to a folder on the PC, it only shows a hair over 2K, so for some reason, it is getting clipped.  Oddly, it leaves a remnant after the transfer of "U.jpg" on the Nano.  The Nano has only the other user file 0.htm (about 3.5K) on it so I really can't think of how the Nano would be short space. The 16K I'd think would occupy A-H, no?  The Nano is r76a, RTC-0 is installed.  Using Trilogi 6.43 over ethernet.
Thanks

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Technical support / Set up of ethernet via RS-485 slave?
« on: August 24, 2012, 05:52:20 PM »
I've got a new Nano-10 here (no rs-232 port). I haven't had any luck on the initial hook up over ethernet, nor did I with prior FMDs.  I ended up using rs-232 and TL server to get ip and passwords assigned on the FMD's.  The ethernet worked great after that for Trilogi and web.

Is it reasonable to think about using one of my already setup FMD's to talk to the Nano over the 485 and set up the ethernet port on the Nano?  

If not, I'll locate a usb to 485 converter.

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Technical support / Running temperature
« on: July 20, 2012, 03:47:57 PM »

Clipped.


The PLC is tested to withstand the following environmental stress:

a. Storage temperature: -20 to +85 degree C
b. Running temperature: 0 to 70 degree C.


So, I'm curious about winter operations.   The FMD88 sits in a plastic Nema 4x enclosure, which to some degree insulates the internals from outside cold.  Since it operates irrigation equipment, most of the use is not during the winter.   Is low temperatures harmful, so I need to add heat or shut down the system?  Or are low temps more just a inconvenience, say they make ADC's less accurate ?   ADC temps are likely the one thing that would still be of interest in the non-irrigation season.

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Technical support / FMD88 Analogue Inputs- 10 or 12 bit?
« on: July 20, 2012, 03:00:59 PM »
So the documentation mentions the ADC's are 10 bit x 4 to get 12 bit values.  Funny thing is, when i watch 12 bit ADC channels, the numbers don't jump around by increments of 4.   Is this due to averaging of the 12 bit values or what exactly is going on in the background?

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Technical support / Re:Virtual LCD on Web- allowable character count
« on: June 08, 2012, 06:41:55 AM »
Thank you for the kind offer of the development team.   It sounds like it is a bigger deal than I originally thought.  The virtual screen in simulation allows at least 40 characters, I thought it might be as simple as changing the way the web page handled it.   I hadn't considered the PLC need for 20 character limit, though I think that is what I have seen.  It would appear the PLC truncates the line rather than overflows to the next.

As with most things, there is more than one method for achieving a goal.   There is some instruction on exchanging screen information with timers and a custom function.  
http://www.tri-plc.com/yabbse/index.php?board=1;action=display;threadid=1579;start=msg5159#msg5159
I'll give that a try and see what can be done.

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Technical support / Virtual LCD on Web- allowable character count
« on: June 07, 2012, 08:15:50 AM »
FMD and Trilogi 6.43
The virtual LCD screen in Trilogi shows more characters per line than the web LCD screen.  I like having the option for more characters.
I've made a few HTML changes to increase the size of the virtual screen, but that doesn't do anything for allowing more characters per line.   I've got space but can't use it.

Where would I find and be able to adjust the allowed characters per line?   I don't expect to have anything besides  a virtual LCD, so I'm not worried about making changes a physical LCD couldn't accept.

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Technical support / Analog input discussion, FMD88-10 User manual
« on: May 14, 2012, 05:38:12 AM »
Chapter 5 discusses the analog inputs, of which there are 2 types.  In addition, there are two analog converters, each handling 4 of the eight.  Section 5.2.2 mixes discussion of points 7&8 and 5-8.  Are points 5&6 some how different than points 1-4, other than they are on a different converter? Please explain or if it is a typo, make a note so it may be corrected in the next revision.  (I'm reading Rev 1, Nov2011).

5.2.2   A/D #7 to 8
The DC input impedance of Analog inputs #7 & 8 are all 20.00K ohms (0.1%). This is not a problem when connected to a 0-5V low impedance analog source.
However, if you need to connect to 0-10V inputs or 4-20mA analog source to A/D #5 to #8, you have to take into consideration the low A/D input impedance in your design. The following figures show how to connect 4-20mA current source signals and 0-10V signals to the A/D inputs #7 to 8.

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