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Search: Posts Made By: Peter Nachtwey
Forum: LIVE PLC Questions And Answers Today, 02:18 PM
Replies: 9
Views: 459
Posted By Peter Nachtwey
The new firmware is probably too big to fit in...

The new firmware is probably too big to fit in the old flash memory chips.
Forum: LIVE PLC Questions And Answers Yesterday, 02:44 AM
Replies: 15
Views: 864
Posted By Peter Nachtwey
Mine too.

Mine too.
Forum: LIVE PLC Questions And Answers February 14th, 2020, 05:46 PM
Replies: 9
Views: 459
Posted By Peter Nachtwey
What about the basic start-stop?

What about the basic start-stop?
Forum: LIVE PLC Questions And Answers February 14th, 2020, 02:16 PM
Replies: 14
Views: 658
Posted By Peter Nachtwey
My solution is best. It allows delaying a pulse...

My solution is best. It allows delaying a pulse stream by any amount and changing the delay. There input can change many times within the delay and all changes will be delayed by the correct amount....
Forum: LIVE PLC Questions And Answers February 12th, 2020, 12:45 AM
Replies: 15
Views: 864
Posted By Peter Nachtwey
I agree with Tom and the others. I don't like...

I agree with Tom and the others.
I don't like the new way.
Forum: LIVE PLC Questions And Answers February 9th, 2020, 07:46 PM
Replies: 32
Views: 8,684
Posted By Peter Nachtwey
The sine function argument is in radians. There...

The sine function argument is in radians. There are 2*PI radians per 360 degrees or cycles.



There should be no glitches at the crossover point.


My next article in hydraulics and...
Forum: LIVE PLC Questions And Answers February 6th, 2020, 04:32 PM
Replies: 8
Views: 536
Posted By Peter Nachtwey
The real problem is how do you handle the case...

The real problem is how do you handle the case where two masters write to the same location at the same time or what happens in a read modify write situation?
Forum: LIVE PLC Questions And Answers February 5th, 2020, 10:58 AM
Replies: 6
Views: 343
Posted By Peter Nachtwey
I smh

I smh
Forum: LIVE PLC Questions And Answers February 5th, 2020, 09:49 AM
Replies: 5
Views: 279
Posted By Peter Nachtwey
0.1 micron rods are available from Temposonic.

0.1 micron rods are available from Temposonic.
Forum: LIVE PLC Questions And Answers February 5th, 2020, 01:42 AM
Replies: 5
Views: 279
Posted By Peter Nachtwey
Leatherman uses our controller to bend metal...

Leatherman uses our controller to bend metal parts for it multitool.


The problem is the quality of the air. Dirty air gums up the cylinders.
High friction cylinders with high about of static...
Forum: LIVE PLC Questions And Answers February 3rd, 2020, 09:52 PM
Replies: 7
Views: 551
Posted By Peter Nachtwey
We use Adventech in food environments where it is...

We use Adventech in food environments where it is hot, steam and must survive a wash down.
Forum: LIVE PLC Questions And Answers February 3rd, 2020, 01:01 PM
Replies: 38
Views: 1,928
Posted By Peter Nachtwey
You are talking about ancient technology. Now...

You are talking about ancient technology. Now the CPU chips have a counter that counts clock cycles while the chip is on. It keeps counting and rolls There is no need for extra hardware unless...
Forum: LIVE PLC Questions And Answers February 2nd, 2020, 11:36 PM
Replies: 38
Views: 1,928
Posted By Peter Nachtwey
Normally I wouldn't waste my time on this but it...

Normally I wouldn't waste my time on this but it is after the super duper bowl.


A queue or FIFO is required.
I would want to know the maximum required delay.
I would like to know how fast the...
Forum: LIVE PLC Questions And Answers February 1st, 2020, 06:29 PM
Replies: 15
Views: 767
Posted By Peter Nachtwey
out := out xor OneShot.Q; It has been a...

out := out xor OneShot.Q;


It has been a while since I programmed in ST. I know the R_TRIG is a FB. One must instantiate an instance of R_TRIG then it can be used.


I don't see why ladder...
Forum: LIVE PLC Questions And Answers February 1st, 2020, 06:21 PM
Replies: 8
Views: 515
Posted By Peter Nachtwey
I am using git now.

I am using git now.
Forum: LIVE PLC Questions And Answers February 1st, 2020, 11:26 AM
Replies: 15
Views: 767
Posted By Peter Nachtwey
This should be a one liner folks. ST has a...

This should be a one liner folks.
ST has a RisingEdge FB and an XOR function.
Forum: LIVE PLC Questions And Answers January 31st, 2020, 04:38 PM
Replies: 38
Views: 1,928
Posted By Peter Nachtwey
I really wish people would provide their...

I really wish people would provide their specifications. How accurate must the delay be? Is one second good enough?
Forum: LIVE PLC Questions And Answers January 29th, 2020, 09:23 PM
Replies: 2
Views: 237
Posted By Peter Nachtwey
Both MTS and Balluff should have something. In a...

Both MTS and Balluff should have something. In a pinch you can try Gemco.
MDT rods are often use to monitor the level of fluids in the food or alcohol industry.
Forum: LIVE PLC Questions And Answers January 28th, 2020, 10:48 AM
Replies: 39
Views: 160,380
Posted By Peter Nachtwey
I closed my LinkedIn and Facebook accounts.

I closed my LinkedIn and Facebook accounts.
Forum: LIVE PLC Questions And Answers January 26th, 2020, 06:34 PM
Replies: 860
Views: 179,483
Posted By Peter Nachtwey
I would have been furious.

I would be furious if something so simple took so long.
I could or better yet some of my people could have done that in a day. This thread was not a good thread. Yes, it it learning by doing but...
Forum: LIVE PLC Questions And Answers January 23rd, 2020, 01:56 PM
Replies: 6
Views: 442
Posted By Peter Nachtwey
The first picture does not look right to me. I...

The first picture does not look right to me. I agree that this is a proportional solenoid valve. However, the diagram to the valve from the bottom is not right. The tank and pressure should be...
Forum: LIVE PLC Questions And Answers January 22nd, 2020, 10:04 PM
Replies: 17
Views: 1,130
Posted By Peter Nachtwey
I use VIM instead of Vi. I use to use VI a lot...

I use VIM instead of Vi. I use to use VI a lot a long time ago but I didn't like having to switch back and forth between the modes.

It should be possible to enter LD using text like Rockwell...
Forum: LIVE PLC Questions And Answers January 21st, 2020, 11:09 AM
Replies: 28
Views: 1,798
Posted By Peter Nachtwey
There is a lot of difference between knowing ST...

There is a lot of difference between knowing ST and writing a lexer, parser and code generator.


Do you know how python handles bits, BYTEs, WORDs, structures, unions etc? I suggest you look...
Forum: LIVE PLC Questions And Answers January 20th, 2020, 02:56 PM
Replies: 28
Views: 1,798
Posted By Peter Nachtwey
This will be a long struggle. If you aren't...

This will be a long struggle. If you aren't familiar with compiler writing you may get frustrated.

I started an ST compiler a long time ago. I bought the full specification and used winflex and...
Forum: LIVE PLC Questions And Answers January 14th, 2020, 11:22 AM
Replies: 23
Views: 1,183
Posted By Peter Nachtwey
The pressure will increase with the flow squared...

The pressure will increase with the flow squared if the the restriction to flow is constant.
https://en.wikipedia.org/wiki/Orifice_plate.

I usually control pressure by controlling the valve as...
Showing results 1 to 25 of 500

 
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