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Search: Posts Made By: Peter Nachtwey
Forum: LIVE PLC Questions And Answers November 21st, 2020, 10:56 AM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
I didn't see the part about the fan but you are...

I didn't see the part about the fan but you are correct about changing the load.




Yes, the can be many poles, but the dead times are additive when it comes to the final result.


If the...
Forum: LIVE PLC Questions And Answers November 20th, 2020, 10:54 PM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
There are two time constants. There was no...

There are two time constants. There was no cooling system. There is the dead time it take for the thing being heated to get to the temperature sensor. This is a SOPDT system.
The hotrod system...
Forum: LIVE PLC Questions And Answers November 20th, 2020, 05:49 PM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
So when the output of the PID goes to 0 the...

So when the output of the PID goes to 0 the output of the lead/lag filter goes to? This isn't a very good temperature simulator if the temperature goes to 0. It should go to ambient temperature. ...
Forum: LIVE PLC Questions And Answers November 20th, 2020, 05:21 PM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
These are totally different processes. Flow and...

These are totally different processes. Flow and temperature are non integrating processes. Level and pressure are integrating processes. The auto tune for integrating process will not work in...
Forum: LIVE PLC Questions And Answers November 16th, 2020, 03:18 PM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
I think I have found an 8 GB Raspberry PI 4 and...

I think I have found an 8 GB Raspberry PI 4 and an analog board that will cost around 100. Obviously this doesn't cover the cost of a keyboard and monitor but most of us have that stuff laying...
Forum: LIVE PLC Questions And Answers November 16th, 2020, 11:47 AM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
Yes, what are you trying to simulate? That has...

Yes, what are you trying to simulate?
That has only one time constant or pole which is simulated by k.
There is no dead time, no bias, no system or open loop gain.
What about time?



This...
Forum: LIVE PLC Questions And Answers November 16th, 2020, 03:54 AM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
That is irrelevant

Smart a$$.
You should be listening.

If everyone wants to re-invent the wheel the go ahead. There are raspberry pi boards with python. The raspberry pi board will become obsolete but the python...
Forum: LIVE PLC Questions And Answers November 15th, 2020, 10:08 PM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
I want the hardware. The software is trivial. ...

I want the hardware. The software is trivial.

I have simulators for integrating, non integrating, single pole, two pole, two complex poles and more.


The AdvancedHMI software is just...
Forum: LIVE PLC Questions And Answers November 15th, 2020, 06:06 PM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
You guys are not helping much with finding a...

You guys are not helping much with finding a CHEAP hardware solution.
I would like to find a cheap hardware solution with good 16 bit ADC and 16 bit DAC.

The reason I am interested in this is...
Forum: LIVE PLC Questions And Answers November 15th, 2020, 12:31 AM
Replies: 26
Views: 1,830
Posted By Peter Nachtwey
Just curious. Are there any Arduino or Raspberry...

Just curious. Are there any Arduino or Raspberry PI boards with good analog inputs and outputs? Digital outputs would work too for simulating SCR on/off control



I think it would be better to...
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