You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
 
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > Search Forums

Showing results 1 to 25 of 500
Search took 0.13 seconds.
Search: Posts Made By: PeterW
Forum: LIVE PLC Questions And Answers March 25th, 2017, 06:16 PM
Replies: 2
Views: 458
Posted By PeterW
Actually those three are off and you can see the...

Actually those three are off and you can see the power flow through them.

The last N/C is on though, entrada_automatica, this is breaking the circuit.
Forum: LIVE PLC Questions And Answers November 28th, 2016, 11:50 PM
Replies: 5
Views: 608
Posted By PeterW
If their belt conveyors you'd need to have your...

If their belt conveyors you'd need to have your sensor on the non-driven shaft. Either use an encoder or make some sort of toothed wheel with a proximity to pick up pulses.
Forum: LIVE PLC Questions And Answers April 17th, 2016, 02:04 PM
Replies: 6
Views: 737
Posted By PeterW
Might help if you gave an example of what you...

Might help if you gave an example of what you mean by showing some code you want to replicate.
Forum: LIVE PLC Questions And Answers March 9th, 2016, 10:27 AM
Replies: 6
Views: 2,834
Posted By PeterW
I always saved them in text format in word as a...

I always saved them in text format in word as a library.
Forum: LIVE PLC Questions And Answers March 9th, 2016, 10:26 AM
Replies: 6
Views: 2,834
Posted By PeterW
If its your code you developed and can prove it,...

If its your code you developed and can prove it, then Siemens should be able to help.
Forum: LIVE PLC Questions And Answers December 7th, 2015, 09:06 AM
Replies: 17
Views: 1,512
Posted By PeterW
I've always used a tacho ;)

I've always used a tacho ;)
Forum: LIVE PLC Questions And Answers November 22nd, 2015, 04:07 PM
Replies: 17
Views: 1,856
Posted By PeterW
Appologies, I see what your saying now. ...

Appologies, I see what your saying now.

Mostly when I've seen people suggesting FIFO's they are talking purely first in is first out, so 3 objects would result in 3 items in the FIFO with the...
Forum: LIVE PLC Questions And Answers November 19th, 2015, 11:55 PM
Replies: 17
Views: 1,856
Posted By PeterW
Gary, I assure you, after working in Airports for...

Gary, I assure you, after working in Airports for many years, using a FIFO as you say is a big, big no no.

Objects come together, objects go missing, arbitarily expecting the next object seen as...
Forum: LIVE PLC Questions And Answers November 19th, 2015, 06:32 PM
Replies: 17
Views: 1,856
Posted By PeterW
FIFO's are not good for tracking, the only time...

FIFO's are not good for tracking, the only time I've used FIFO's is if it is coded in a way to detect missing objects and throw away the data.

You have to track properly, a FIFO does not do that...
Forum: LIVE PLC Questions And Answers November 19th, 2015, 12:30 PM
Replies: 17
Views: 1,856
Posted By PeterW
If there are 80 pulses of an encoder for the...

If there are 80 pulses of an encoder for the entire length, then create an integer or floating point array 100 long.

I've seen a few methods from here, one would select an entry point and exit...
Forum: LIVE PLC Questions And Answers November 18th, 2015, 06:14 PM
Replies: 10
Views: 1,556
Posted By PeterW
There's a few asked before ...

There's a few asked before

http://www.plctalk.net/qanda/showthread.php?t=42982&highlight=siemens+string+int
(http://www.plctalk.net/qanda/showthread.php?t=42982&highlight=siemens+string+int)
...
Forum: LIVE PLC Questions And Answers October 30th, 2015, 03:37 PM
Replies: 8
Views: 1,179
Posted By PeterW
Like most North America, Canada is entrenched in...

Like most North America, Canada is entrenched in Rockwell.

I've worked on Modicon recently and there is more Modicon than Siemens as far as I can see.

I have worked on Siemens here but a...
Forum: LIVE PLC Questions And Answers October 29th, 2015, 05:29 PM
Replies: 9
Views: 1,074
Posted By PeterW
In all my years of programming S7, I never once...

In all my years of programming S7, I never once did SET, SAVE at the end of a Function. I never used it to continue code outside the block, which I believe is the only time you would do that.
Forum: LIVE PLC Questions And Answers October 29th, 2015, 05:27 PM
Replies: 9
Views: 1,074
Posted By PeterW
My code would have looked like this NW1:...

My code would have looked like this

NW1: condition 1, condition 2 then BEC

------------
------------
BE


If its the last bit of code, why jump down to BE
Forum: LIVE PLC Questions And Answers October 8th, 2015, 05:05 PM
Replies: 14
Views: 1,787
Posted By PeterW
Depends on the brand and type, I believe on some...

Depends on the brand and type, I believe on some PLC's you can pre-determine the output state during loss of power and loss of communication to the PLC.

Whether this is restricted to safety PLCs...
Forum: LIVE PLC Questions And Answers October 5th, 2015, 11:17 AM
Replies: 6
Views: 1,317
Posted By PeterW
The PCS7 automation hardware is a S7-400 PLC. ...

The PCS7 automation hardware is a S7-400 PLC.

You cannot treat it as a normal PLC though, everything must be done via the PCS7 interface, if you don't follow the PCS7 rules you would have to do a...
Forum: LIVE PLC Questions And Answers September 10th, 2015, 09:45 AM
Replies: 2
Views: 623
Posted By PeterW
What PLC and processor is it? The PLC manual...

What PLC and processor is it?

The PLC manual should have help on the stop codes but you need to know which one.

...
Forum: LIVE PLC Questions And Answers July 3rd, 2015, 12:21 PM
Replies: 36
Views: 9,620
Posted By PeterW
If a robot had a positioning error and we needed...

If a robot had a positioning error and we needed to reset, we'd manually move the arm to a position where a straight move to the reset position didn't hit anything, sometimes no movement was needed....
Forum: LIVE PLC Questions And Answers July 3rd, 2015, 12:17 PM
Replies: 36
Views: 9,620
Posted By PeterW
In the early 1980's I was working for Ford in the...

In the early 1980's I was working for Ford in the UK, we had a nice new line which included robots for the first time.

An identical line was in Germany and they monitored the output between the...
Forum: LIVE PLC Questions And Answers July 3rd, 2015, 09:21 AM
Replies: 42
Views: 45,645
Posted By PeterW
Is this still valid for the latest firmware Panel...

Is this still valid for the latest firmware Panel View PVPlus 700/1000 panels?
Forum: LIVE PLC Questions And Answers July 2nd, 2015, 09:28 AM
Replies: 12
Views: 1,198
Posted By PeterW
Looking at the manual, section 7 is for...

Looking at the manual, section 7 is for controlling. You need to choose a SFB for the control:

● SFB 41 for continuous control (CONT_C)
● SFB 42 for step control (CONT_S)
● SFB 43 for pulse...
Forum: LIVE PLC Questions And Answers July 2nd, 2015, 09:17 AM
Replies: 2
Views: 856
Posted By PeterW
Not sure its something I would do unless I really...

Not sure its something I would do unless I really really had to.

How do you fault find etc after you made a change?

If it doesn't work then you may have a problem.

Certainly if I did this,...
Forum: LIVE PLC Questions And Answers June 21st, 2015, 11:26 AM
Replies: 6
Views: 537
Posted By PeterW
Do a forum search for ar1, you'll get threads...

Do a forum search for ar1, you'll get threads like

http://www.plctalk.net/qanda/showthread.php?t=33212&highlight=ar1
Forum: LIVE PLC Questions And Answers June 21st, 2015, 11:19 AM
Replies: 6
Views: 537
Posted By PeterW
Having written all that, I note you state the...

Having written all that, I note you state the processor is a CPU414-2DP!

Which of course is Step 7 and not Step 5.

:lolis::lolis:
Forum: LIVE PLC Questions And Answers June 21st, 2015, 11:13 AM
Replies: 6
Views: 537
Posted By PeterW
Unfortunately I came across a lot of companies...

Unfortunately I came across a lot of companies that stated "must be in ladder" when I worked a lot on Step 5, usually by engineers who were quite ignorant on how Step 5 worked and fed by fear of...
Showing results 1 to 25 of 500

 
Forum Jump

All times are GMT -5. The time now is 07:00 PM.


.