Internet PLC Forum

I like the TRI PLC. I have been working with it for some time. I think it would be even better if the PC based code generation tools would support long varible names and equate them to the internal variable names (A-Z, DM[1-4000] It would
I would love floating poitn make managing program development much quicker. As it is you must keep notes ore spreadsheets to keep trak without  difficulties.

Pulling all douments togther into one manual with sections would be easier to use. The information is usually around in one of the (3-5) manuals or on line but it is not as good as a single document.

Floating point would be nice! Less fooling around to get where you need to go. Maybe a newer processor is needed here?

Thanks
In the trenches.

Thanks. I looked for the impedance in the documnentaition, but did not find the value.

Yes I thought the output LED not coming on was unusual when not connected to a output device. I thought this could have been due to having LEDs on PLC wired same as terminal 9no internal pull up to 24vdc) and would require output connection to 24vdc in order to light up when bit was set.  A schematic of the board would be nice in the documentation or on the website, I could have eliminated this assumption early on.

In more testing: The wiring is as shown. Stepper has own linear and noise is not on output lines from stepper.

With scope check while running simple reversing stepper move, when out1 is at 21v(off) the out5 led is much brighter. Wave form of out 5 shows change from peaks of 21v down to 15v when direction bit goes high (led on, pulled down to ovdc).
I am also seeing 7 volt drop of the full pulled up voltage level of 20volts of the direction bit when out5 is stepping and direction bit not set. I also see "digital noise" for want of a better term on the direction line when stepping and direction bit set. the form matches the stepping form and has peaks about 10v above 0v. The direction line of the stepper is very confused by the noise. The optoisolator on the stepper drive has 220ohm resistors on both sides internally. Any Ideas? I am thinking of adding optoisolator on outputs from TriPLC to the stepper driver to isolate further. Comments?

I am using th analog output of the T100MD to control a pair of VFD'S. I noticed the comment that the outputs are "Unbuffered". I assume thismeans they have no protection for over current etc. The VFD'S have an input which is for 0-10VDC and has scaling so I can use the 0-5 output from the T100MD. My plan is to connect the reference ground from the VFD to the 0VDC connector by DAC outputs and the DAC #1 output to the VFD input. Do I need a current limiting resistor for this or other conditioning? The cabling is less than 5 fet and shielded.

This makes my task much more simple.

I am mixed up some: I think you want to make sure I also include accel-decel parameter in change STEPSPEED command to make sure speed change is smooth.

If  I not include Decel-Accel parameter in SETSPEED it will be abrupt speed change and could loose motor control.

Is my understnading correct?

Thanks

Where can you down load a PDF of the Programmers reference manual I got with my PLC? I have the small green covered book, but would like to print it out in 8 1/2 x 11 paper for my notebook.

Thanks
Chris