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 27
Search took 0.01 seconds.
Search: Posts Made By: Kevbo
Forum: LIVE PLC Questions And Answers February 16th, 2018, 05:11 PM
Replies: 29
Views: 2,613
Posted By Kevbo
A couple of things not yet mentioned: PLCs...

A couple of things not yet mentioned:

PLCs tend to have long life cycles, and the manufacturers typically announce end-of-life well in advance and allow lifetime-buys before ending production. ...
Forum: LIVE PLC Questions And Answers February 16th, 2018, 03:56 PM
Replies: 17
Views: 764
Posted By Kevbo
You are comparing the rating of the thermocouples...

You are comparing the rating of the thermocouples to thermocouple _wire_. The thermocouple rating is what sort of process temperatures it is usable. The wire rating is for the ambient environment....
Forum: LIVE PLC Questions And Answers February 15th, 2018, 04:08 PM
Replies: 10
Views: 451
Posted By Kevbo
It doesn't help you now, but I put an archive of...

It doesn't help you now, but I put an archive of the whole TIA project on the desktop of our PC based HMI's. You can do that with the comfort panels that are Win-CE based as well (have only used...
Forum: LIVE PLC Questions And Answers February 9th, 2018, 11:46 AM
Replies: 18
Views: 1,238
Posted By Kevbo
Various transfer functions can be represented by...

Various transfer functions can be represented by differential equations. For example higher order (than just averaging...first order) filtering of noisy data to smooth it out with less delay than a...
Forum: LIVE PLC Questions And Answers February 5th, 2018, 10:51 AM
Replies: 24
Views: 1,158
Posted By Kevbo
I've been impressed with the computer luggage I...

I've been impressed with the computer luggage I have from Everki. But if Swissgear made something that fit the needs better, I'd not worry about the quality.
Forum: LIVE PLC Questions And Answers February 1st, 2018, 09:49 AM
Replies: 5
Views: 387
Posted By Kevbo
I've done some profiNET (not profiBUS) to modbus...

I've done some profiNET (not profiBUS) to modbus RTU using anybus module.

The main thing is to understand and strictly follow the modbus standard. For example, to set a single coil (1 bit) you...
Forum: LIVE PLC Questions And Answers January 17th, 2018, 10:36 AM
Replies: 47
Views: 2,462
Posted By Kevbo
Ah, thats a nice refinement...no experience with...

Ah, thats a nice refinement...no experience with that particular PLC.
Forum: LIVE PLC Questions And Answers January 17th, 2018, 10:12 AM
Replies: 47
Views: 2,462
Posted By Kevbo
Another suggestion: Use an int to select which...

Another suggestion: Use an int to select which loop is active, NOT two booleans.

Why?

Because sure as anything, next year when you (or the next guy) have to modify the code, you will make an...
Forum: LIVE PLC Questions And Answers January 17th, 2018, 10:04 AM
Replies: 11
Views: 1,018
Posted By Kevbo
What you are describing is a portable scale, and...

What you are describing is a portable scale, and they do exist.

But I think that isn't really what you want, is it? You want some scale parts, that you install to build a complete scale.

The...
Forum: LIVE PLC Questions And Answers January 12th, 2018, 09:36 AM
Replies: 11
Views: 1,029
Posted By Kevbo
There is a body of knowledge on this topic in the...

There is a body of knowledge on this topic in the ham radio community. Specifically memory and keyboard keyers.

A look-up table stores the code for each letter, character, and number. You can...
Forum: LIVE PLC Questions And Answers January 12th, 2018, 08:51 AM
Replies: 17
Views: 691
Posted By Kevbo
When integrating rate readings as suggested in...

When integrating rate readings as suggested in the OP, it is common to lose accuracy due to rounding error at each division point (div by 60 in the OP). This may not be an issue if floating point is...
Forum: LIVE PLC Questions And Answers January 11th, 2018, 06:00 PM
Replies: 2
Views: 324
Posted By Kevbo
MOSCAD was popular in the water biz for some...

MOSCAD was popular in the water biz for some reason. The municipality I worked for had just finished ripping out all the MOSCAD hardware and replacing it with GE stuff about a year before I...
Forum: LIVE PLC Questions And Answers January 11th, 2018, 05:40 PM
Replies: 7
Views: 411
Posted By Kevbo
S7-1200 has 0-10V AI but no AO so OP is on the...

S7-1200 has 0-10V AI but no AO so OP is on the right track. On-off control with hysteresis (deadband) is the simplest way to do this.
Forum: LIVE PLC Questions And Answers November 17th, 2017, 04:59 PM
Replies: 0
Views: 216
Posted By Kevbo
SIWAREX modules under S7-1500

I beat my head against the wall over this one...maybe someone will find this note and it will save them some time: (maybe it will be me when I have forgotten this tidbit!)

If you are trying to...
Forum: LIVE PLC Questions And Answers October 2nd, 2006, 12:12 PM
Replies: 4
Views: 1,704
Posted By Kevbo
Single output supplies are usually fine down to...

Single output supplies are usually fine down to no load. (there is no Min-) Multiple output supplies frequently have a minimum load current on one output (designated as the main output) for proper...
Forum: LIVE PLC Questions And Answers September 25th, 2006, 02:47 PM
Replies: 7
Views: 2,342
Posted By Kevbo
If that is an electrical signal line, no problem....

If that is an electrical signal line, no problem.

If that line is actually a tube filled with water, then you need to locate the pressure transmitter at the same altitude as the bottom of the tank.
Forum: LIVE PLC Questions And Answers August 21st, 2006, 10:43 AM
Replies: 6
Views: 1,283
Posted By Kevbo
Often a PLC has only one data connection, and if...

Often a PLC has only one data connection, and if you are using an HMI, then the HMI uses that connection. So if you need to go online with the PLC, then you have to disconnect the HMI.
...
Forum: LIVE PLC Questions And Answers August 21st, 2006, 10:32 AM
Replies: 25
Views: 6,139
Posted By Kevbo
If you want to do a quick test, use the phone to...

If you want to do a quick test, use the phone to send a text message to an email address you have access to. The "from" field should be, as stated above: <your phone number>@vtext.com.
Forum: LIVE PLC Questions And Answers August 16th, 2006, 06:15 PM
Replies: 109
Views: 11,462
Posted By Kevbo
There might be some "never does" and some "always...

There might be some "never does" and some "always does" that always give the best code, but I'm not aware of them. Not PLC related, but I once programed some code that modified itself...to the...
Forum: LIVE PLC Questions And Answers August 15th, 2006, 12:26 PM
Replies: 8
Views: 1,062
Posted By Kevbo
XP-pro, (vs. home edition) may be required. Big...

XP-pro, (vs. home edition) may be required. Big issue, as most laptops nominally are bundled with HE.
Forum: LIVE PLC Questions And Answers August 11th, 2006, 12:55 PM
Replies: 66
Views: 6,220
Posted By Kevbo
Properly made apple pie is the best, sadly it is...

Properly made apple pie is the best, sadly it is seldom properly made.

Rhubarb?....bleh....waste of an otherwise perfectly good crust, that is!
Forum: LIVE PLC Questions And Answers August 10th, 2006, 05:46 PM
Replies: 4
Views: 1,126
Posted By Kevbo
I'll second the Novus recomendation. It is a...

I'll second the Novus recomendation. It is a staple for maintaining aircraft canopies, and I've also found it works well on motorcycle windshields and helmet visors.
Forum: LIVE PLC Questions And Answers August 4th, 2006, 11:17 AM
Replies: 83
Views: 15,870
Posted By Kevbo
Please don't take this as a challenge. I'd really...

Please don't take this as a challenge. I'd really like to understand where you are coming from.




Could you please elaborate on how/why this makes debugging easier? Seems like one more layer...
Forum: LIVE PLC Questions And Answers August 4th, 2006, 10:47 AM
Replies: 12
Views: 2,553
Posted By Kevbo
A little dab 'l do ya. You only want enough to...

A little dab 'l do ya. You only want enough to fill the tool marks in the heat sink.

Also I recommend using disposable gloves. Even then it will probably end up on your nose, ears, elbows, and...
Forum: LIVE PLC Questions And Answers August 4th, 2006, 10:27 AM
Replies: 83
Views: 15,870
Posted By Kevbo
I'm new to forum as well, so spiffy graphics are...

I'm new to forum as well, so spiffy graphics are something for the future. We'll see if ascii art will work. Note that this is just off the cuff generic notation, and specifics will vary by PLC.
...
Showing results 1 to 25 of 27

 
Forum Jump

All times are GMT -5. The time now is 11:07 PM.


.