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Topics - 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?

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).

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).  

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.

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


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.

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.

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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