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Topics - cdenk

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31
Technical support / SeialComm.zip??
« on: December 20, 2006, 12:48:32 PM »
Where do I find the communications protocol file that's supposed to be at http://www.tri-plc.com/applications/serialcomm.zip. It's referenced page 3-11 of theT100MD+ user's manual.

32
Technical support / Copy/Paste ladder rungs
« on: September 12, 2006, 10:58:14 AM »
Is there a way to copy paste ladder rungs to a word processor, this forum, etc. ?

Can files be attached to a message?

Can a JPG (or other graphics) file be embedded in message?

I have a file that sets several Outputs, then DM[] =  ADC(1) , does some scaling all in one Cust Fun. Then in a 2nd Cust Fun uses SETLCD to display the results. When the little file runs, it's OK, but when copy/paste to a larger file after debuggling, the values go goofy. Would like to post the little file, but it's more than I can do with a text editor and ASCII charaters, plus likelyhood of doing a typo.

33
Technical support / Execution order of ladder diagram.
« on: August 14, 2006, 08:24:39 AM »
Just to confirm my thoughts: (This is for a T100MD888+)
1: The ladder is executed from top to bottom, in order, with all changes to outputs occuring at the very bottom of the ladder.
2: Custom functions are executed as part of the rung that they occupy from top to bottom. Exception a "CALL" would bring a copy of programming related onto that rung.
3: Variables, both A -Z and DM[]'s can be assigned a value in on Custom Function (A = ADC(1) , in a lower rung function, modified (A = A/2), and at a lower yet rung, in a custom function use the value (SETLCD 1,1,STR$(A) ).
The CUstom Functions would do there things and at the end the proper value of "A" would be displayed.

Seems this works with A-Z but may not work with DM[]'s ? The ADC values don't change quickly, and an erroneous result for a cycle or 2 is not a problem.

34
Technical support / Trilogi v 6.1 online monitoring problem
« on: July 24, 2006, 04:50:48 PM »
While doing online monitoring, and clicking "view", all I get is an empty white window "view variables - integers". Version 5.33 works OK.

35
Technical support / Analog switches
« on: March 16, 2006, 05:38:24 AM »
With T100MD888+ and EXP4040, I may need a few more ADC inputs, and was thinking of an Analog switch chip. Are they suitable to control with outputs to select which sensor to connect to, the programming would take care of scaling, etc.?

Is there something in specifications to watch out for?

The applications examples show them before the Op-Amp, could the be used going int the PLC ADC in?
:)

36
Technical support / Deleting deleted custom functions in *.PC5 file
« on: February 25, 2006, 11:19:12 AM »
When printing the custom functions of a *.PC5 file that has deleted Custom functions in it, an empty block with only a number label prints (in addition to the normal custom functions). How can I delete these custom functions from the file. If this requires using a text editor, what are the delimiters of the info? Is the format of a PC5 file available?

37
Technical support / AMPMETER USING OP-AMP
« on: February 18, 2006, 05:36:34 PM »
Trying to build an ampmeter using an LM324 op-amp to measure plus/minus 50 amps with a 1mv/amp shunt = +/- 50mv to the op-amp. The "-" of the shunt is also ground of the op-amp 12 volt supply. The ADC input is 0 - 5 VDC. Since the op_amp input goes negative, can I design the circuit with the +/- voltage in, and the op-amp input floats, with a range of minimum 0 to 100mv? The LM324 has 3 other sections in use.

38
Technical support / Unable to complete circuit
« on: January 18, 2006, 07:57:29 AM »
I have a relay contact followed by 2 parallel relay contacts that I would like to complete the circuit with either a relay coil, output, or CusFn. With the top parallel contact highlighted and the green box at the right  end, and trying to select 7 or 9 (or the menu boxes) nothing happens. The shift key does shift the green box eft or right of the top parallel contact.  Previously I had to erase the whole circuit and start over. Looking at the *.TL5 file with notepad, doesn't look like any strange characters in the area of the subject items. :)

39
Technical support / Trilogi defaults - wish list
« on: January 18, 2006, 07:16:34 AM »
With Trilogi 5.33, is there a way (like edit a config file), or can it be put on the wish list:
1: File>Open: Either remember last folder, or set default to a particular folder.
2: File>Print: Printer remembers last printing from Trilogi "options" like Fast Draft printing. Other windows applications do this.
3: File>Print>Ladder Circuits: Remember set default to 80 columns

:)

40
Technical support / Trilogi 5.31b - tab doesn't work
« on: December 27, 2005, 02:18:00 PM »
With Trilogi 5.31b, using the "TAB" to move the insert point doesn't work.

41
Technical support / Sensing 120 VAC input
« on: December 19, 2005, 07:49:10 AM »
I have a TRI-PLC T00MD-888+, and would like to sense the 120VAC as being on/off only. Know I could do it with a 9 transformer, rectifier bridge , capacitor resistor divider and opto-isolator. Thinking there is a simpler way to do it, like a 120vac input, TTL output Opto-isolator chip.

42
Technical support / 12VDC isolated voltage measurement
« on: October 26, 2005, 08:29:39 AM »
I would like to measure say 0-15 vdc from a marine battery with a PLC (TRI-PLC T00MD-888+) that has 0 - 5 VDC ADC input. Concerned with developing a ground loop since there is already a common ground that the PLC is using to control other items that might have chassis ground. Thinking there should be an off the shelf transformer or something to do the isolation. I can handle voltage dividing resitors or OP-AMP selection, just the isolation got me baffled.

43
Technical support / HMI displays wrong value
« on: September 20, 2005, 02:35:30 PM »
With a T100MD-888+ AND MD-HMI240 running a simple program:
A= ADC(1)
SETLCD 1,1,STR$(A)

(There are a few other statements that are (') out)

The HMI (both the HMI and it's online counterpart) and online monitoring values for variable "A" differ for some input values.

ADC (1)    online              HMI
input         Variable     and online lcd display
values       "A"                  Values
volts          values

0.34                 280            2806
1.55               1268            1268
2.84               2332            2332
4.15               3400            3400

Note that only the lowest values are funny, the others are tracking OK.
The ADC input is from an LM324N OP-AMP with input from 4 resistances switched.

44
Technical support / Analog input to T100MD-888+ ??
« on: June 19, 2005, 07:11:49 AM »
I have a Tri-Plc T100MD-888+ PLC. It has Analog 0 - 5 volt input, and 5 volt reference voltage available. I have a fuel level sensor that is 0 - 90 ohm range to interface, only need around 50 or so steps, and can handle calibration/non-linearity with lookup table or Basic programing.  Presently there is 30 feet of Cat-5 cable in metallic conduit  to the remote location, I would prefer signal conditioning at the PLC end of the cable.

Also what would be the easiest way to get temperature readings, say -30F to +130F, nearest degree resolution would be more than enough.

Spent all the budget on the PLC, buying a $250 signal conditioner is not an option.

45
Technical support / Fuses & Grounds for T100MD
« on: June 03, 2005, 06:37:10 AM »
I have a T100MD-888+, MD-EXP4040, and a MD-HMI. The T100 manual shows a 1 amp fuse for the T100MD, but no fuses are shown for the other boards. Should the other boards be fused,? value?, parallel fuses?, or one larger fuse for all?  Of course all going to the same power supply, mine happens to be 12 DC.

On the T100MD-888+, the high current ground - all in/output grounds (returns) should go there, to an off the boards ground point (with short proper capacity (amps) wire)  with the exception of the TTL & Cmos in/out on the MD-EXP4040 which have their own grounds on the headers.
 :)

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