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 372
Search took 0.04 seconds.
Search: Posts Made By: rupej
Forum: LIVE PLC Questions And Answers Yesterday, 07:08 PM
Replies: 5
Views: 405
Posted By rupej
Yeah, and even then it might not work. So you...

Yeah, and even then it might not work. So you pick a random tag to get the syntax right and retype the tag name that you want.
Forum: LIVE PLC Questions And Answers Yesterday, 07:05 PM
Replies: 12
Views: 342
Posted By rupej
I'm a big fan of running a PID (or just P if you...

I'm a big fan of running a PID (or just P if you don't need super accurate control) on your controller, and using a PWM output to a standard zero-crossing SSR. 5Hz works very well for resolution and...
Forum: LIVE PLC Questions And Answers Yesterday, 11:07 AM
Replies: 12
Views: 378
Posted By rupej
So if an unmanaged switch can handle unicast and...

So if an unmanaged switch can handle unicast and only direct traffic to the port it needs to go, and a managed switch still hits all ports when a device does broadcast, how is a managed switch any...
Forum: LIVE PLC Questions And Answers July 11th, 2018, 07:16 AM
Replies: 6
Views: 292
Posted By rupej
Definitely look at IO link if your processor can...

Definitely look at IO link if your processor can use it. IFM makes some cost-effective blocks also.
Forum: LIVE PLC Questions And Answers July 7th, 2018, 10:20 AM
Replies: 17
Views: 717
Posted By rupej
That's cool- I didn't know that was an...

That's cool- I didn't know that was an instruction in ladder. I'm guessing it increments once per scan?

Edit: Oh, I think I see. It calls the subroutine over and over until the loop is finished?
Forum: LIVE PLC Questions And Answers July 5th, 2018, 12:46 PM
Replies: 27
Views: 1,042
Posted By rupej
Ah I see, that makes sense then. In that case, my...

Ah I see, that makes sense then. In that case, my only suggestion would be to eliminate any unnecessary switches and use fiber to connect the remaining ones if the distance > 300 meters. Not sure if...
Forum: LIVE PLC Questions And Answers July 5th, 2018, 06:56 AM
Replies: 27
Views: 1,042
Posted By rupej
I don't think MicroLogix can be mapped as...

I don't think MicroLogix can be mapped as Ethernet I/O, but I've never tried...

One thing that may help is to set each MicroLogix to use a read MSG instead of the ControlLogix doing 35 writes.
Forum: LIVE PLC Questions And Answers June 29th, 2018, 07:26 AM
Replies: 28
Views: 687
Posted By rupej
Interesting. I vaguely remember some discussion...

Interesting. I vaguely remember some discussion about passing oneshots to different periodic tasks. Is the thought that each task gets its own "instance" of the ONS that sits and waits for the task...
Forum: LIVE PLC Questions And Answers June 27th, 2018, 08:48 PM
Replies: 6
Views: 193
Posted By rupej
Not sure I'm seeing the whole pictute, but isn't...

Not sure I'm seeing the whole pictute, but isn't the modulator max setting the "gain" of this function? Since the higher the number, the lower the pulse duration?
Forum: LIVE PLC Questions And Answers June 27th, 2018, 08:40 PM
Replies: 28
Views: 687
Posted By rupej
That was my first thought as well. If the logic...

That was my first thought as well. If the logic is in a periodic task, or the bits that trigger the oneshot are in a periodic task, it's possible that there may be "missed connections" without some...
Forum: LIVE PLC Questions And Answers June 13th, 2018, 07:55 PM
Replies: 2
Views: 335
Posted By rupej
If you wanted to factory reset or teach them, how...

If you wanted to factory reset or teach them, how do you do it? Is it possible they are getting this signal erroneously?
Forum: LIVE PLC Questions And Answers June 12th, 2018, 06:21 PM
Replies: 6
Views: 335
Posted By rupej
Turck also makes a very compact Ethernet-based IO...

Turck also makes a very compact Ethernet-based IO modules. Here is one flavor:

...
Forum: LIVE PLC Questions And Answers June 7th, 2018, 07:24 PM
Replies: 1
Views: 217
Posted By rupej
I'm not sure I follow. Why do you need to change...

I'm not sure I follow. Why do you need to change the speed of the pumps? I see you need to maintain a constant blend, but are you controlling the speeds to an overall flow target or just trying to...
Forum: LIVE PLC Questions And Answers June 7th, 2018, 06:31 PM
Replies: 1
Views: 157
Posted By rupej
Import feature works whenever I've used it, but...

Import feature works whenever I've used it, but that's with doing a simple export from one, and importing to another. I've never tried editing with notepad... that may be your issue?

I agree that...
Forum: LIVE PLC Questions And Answers June 7th, 2018, 06:24 PM
Replies: 8
Views: 306
Posted By rupej
Yep, I always select B and everything works. ...

Yep, I always select B and everything works. Never understood why they don't make a "C" option to select in RSLogix 500... would certainly help with the confusion!
Forum: LIVE PLC Questions And Answers June 3rd, 2018, 08:57 AM
Replies: 3
Views: 383
Posted By rupej
Thanks Okie! I'll try adding some filtering, that...

Thanks Okie! I'll try adding some filtering, that makes a lot of sense.

Though I am struggling with the deadband logic- the only way I can think to implement it effectively seems overly complex...
Forum: LIVE PLC Questions And Answers June 2nd, 2018, 04:32 PM
Replies: 3
Views: 383
Posted By rupej
Feed Forward questions

I do a lot of hot water set projects, which are simply a steam heat exchanger with a steam control valve that adjusts to a PID setpoint- the water outlet temperature. These are often controlled by...
Forum: LIVE PLC Questions And Answers June 1st, 2018, 07:47 PM
Replies: 4
Views: 325
Posted By rupej
HSCs don't read a PWM signal, they just read...

HSCs don't read a PWM signal, they just read pulses. Sorry I can't help otherwise with your S7 application.
Forum: LIVE PLC Questions And Answers June 1st, 2018, 07:28 PM
Replies: 2
Views: 209
Posted By rupej
Just checked the manual- you need Series B to do...

Just checked the manual- you need Series B to do Modbus TCP. You can check Rev A's functionality by creating a new offline project for a ML1400 A and seeing if the modbus table exists in the...
Forum: LIVE PLC Questions And Answers May 30th, 2018, 10:47 AM
Replies: 13
Views: 455
Posted By rupej
Interesting, I never thought about it that way....

Interesting, I never thought about it that way. So you're essentially "stealing" current from the other device. I guess it works if you don't mind the momentary loss of signal.
Forum: LIVE PLC Questions And Answers May 29th, 2018, 06:50 PM
Replies: 6
Views: 200
Posted By rupej
Need more info. There should be no windup if...

Need more info. There should be no windup if you're in manual and writing to the output directly. Bumpless transfer is inherent from manual to auto if done correctly.
Forum: LIVE PLC Questions And Answers May 29th, 2018, 06:47 PM
Replies: 8
Views: 261
Posted By rupej
Thanks a bunch guys! I haven't given much...

Thanks a bunch guys!

I haven't given much info about the process because I honestly don't know much. My company is bidding two unloading/batch control systems for a large design firm. I have no...
Forum: LIVE PLC Questions And Answers May 29th, 2018, 01:05 PM
Replies: 8
Views: 261
Posted By rupej
I think it's going to at least 3 batch...

I think it's going to at least 3 batch controllers/ PLCs. Hmmm.
Forum: LIVE PLC Questions And Answers May 29th, 2018, 09:51 AM
Replies: 8
Views: 261
Posted By rupej
Splitting a 24VDC high speed output signal?

I have a customer that wants to use a single MicroMotion flow meter output (24VDC high speed digital) to go to various batch controllers (pulse counters) at once.

I suspect you could wire the...
Forum: LIVE PLC Questions And Answers May 28th, 2018, 06:27 PM
Replies: 12
Views: 462
Posted By rupej
I make the "grayed out" button visible at all...

I make the "grayed out" button visible at all times, and I change the visibility as needed to the real button on top. Never had any issues doing it that way.
Showing results 1 to 25 of 372

 
Forum Jump

All times are GMT -5. The time now is 07:14 PM.


.