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Search: Posts Made By: RVaughan
Forum: LIVE PLC Questions And Answers June 10th, 2022, 03:17 PM
Replies: 5
Views: 855
Posted By RVaughan
The SF light on your Power Module indicates a...

The SF light on your Power Module indicates a problem at that module. The SF light on the CPU indicates a problem somewhere on some device controlled by that CPU.
Check the wiring and voltage level...
Forum: LIVE PLC Questions And Answers May 29th, 2022, 10:24 AM
Replies: 3
Views: 798
Posted By RVaughan
Click the arrow next to HMI... to get more...

Click the arrow next to HMI... to get more information.

The compilation result shows zero tags. Is this an empty project?
Forum: LIVE PLC Questions And Answers May 13th, 2022, 10:56 PM
Replies: 4
Views: 908
Posted By RVaughan
I think mk42 meant to link to An example like...

I think mk42 meant to link to An example like this...
Forum: LIVE PLC Questions And Answers May 4th, 2022, 07:49 PM
Replies: 7
Views: 1,169
Posted By RVaughan
RET is the end-of-block instruction for many...

RET is the end-of-block instruction for many controllers. Some require it explicitly, some it only shows up in the source code.
Forum: LIVE PLC Questions And Answers April 25th, 2022, 02:09 PM
Replies: 13
Views: 1,301
Posted By RVaughan
What is the data type of the compare instruction,...

What is the data type of the compare instruction, and what is the data type of each tag? Are you mixing signed and unsigned integers?
Forum: LIVE PLC Questions And Answers April 18th, 2022, 02:50 PM
Replies: 14
Views: 2,737
Posted By RVaughan
https://support.industry.siemens.com/cs/document/1...

https://support.industry.siemens.com/cs/document/109784440/simatic-step-7-incl-safety-s7-plcsim-and-wincc-v17-trial-download?dti=0&lc=en-US
You will need an account (free).
Forum: LIVE PLC Questions And Answers April 9th, 2022, 12:50 PM
Replies: 10
Views: 1,700
Posted By RVaughan
Does Logix have an invert write instruction...

Does Logix have an invert write instruction nowadays? --(/)--
I think this or a --[NOT]--( )- would be preferable, due to the varied behavior of the OTL/OTU instructions. (Though I could be...
Forum: LIVE PLC Questions And Answers April 7th, 2022, 01:24 AM
Replies: 5
Views: 569
Posted By RVaughan
The screen is entirely optional and unrelated to...

The screen is entirely optional and unrelated to the run state of the CPU.
JRW has a good thought.
First thing I would for is remove the screen and reinstall. There is a slot at the top to pry...
Forum: LIVE PLC Questions And Answers April 4th, 2022, 04:31 PM
Replies: 6
Views: 584
Posted By RVaughan
I'm inclined to connect one to the bathroom...

I'm inclined to connect one to the bathroom exhaust fan when I renovate it in a few years. Just hate the idea of losing all that warm air.
Forum: LIVE PLC Questions And Answers March 21st, 2022, 09:59 PM
Replies: 22
Views: 2,144
Posted By RVaughan
In Portal, peripheral addresses are coded with...

In Portal, peripheral addresses are coded with colon P

IW258:P
Forum: LIVE PLC Questions And Answers March 13th, 2022, 11:45 AM
Replies: 29
Views: 3,313
Posted By RVaughan
It is essential that remember that there are...

It is essential that remember that there are always one thousand solutions to any programming problem,
but the only right way is mine.
Forum: LIVE PLC Questions And Answers March 9th, 2022, 10:44 PM
Replies: 2
Views: 929
Posted By RVaughan
Done in one. The compile button on the...

Done in one.

The compile button on the toolbar is context sensitive. That is, it will compile only what you gave highlighted (or the last active object). If you were in the Working Area last, it...
Forum: LIVE PLC Questions And Answers March 4th, 2022, 02:14 PM
Replies: 66
Views: 7,444
Posted By RVaughan
Formerly: "I program the computers that run...

Formerly: "I program the computers that run assembly lines."

Now: "I teach people how to program industrial computers."
Forum: LIVE PLC Questions And Answers February 13th, 2022, 12:22 PM
Replies: 21
Views: 3,076
Posted By RVaughan
My first thoughts were along the same lines. ...

My first thoughts were along the same lines.
Can they show reliability after 80,000 hours?
Forum: LIVE PLC Questions And Answers January 22nd, 2022, 12:58 PM
Replies: 11
Views: 1,645
Posted By RVaughan
First, understand the scan cycle of a PLC. It...

First, understand the scan cycle of a PLC. It executes the code, then starts over. It does this as fast as possible, with one scan occurring every few milliseconds.*
If your timer's Q is 1, the...
Forum: LIVE PLC Questions And Answers January 16th, 2022, 10:22 PM
Replies: 10
Views: 1,254
Posted By RVaughan
1. Have you compiled the block since...

1. Have you compiled the block since de-optimizing? Try that.
2. Try collapsing The_reals before adding the AT
3. Delete the row, add a new one in its place, and try selecting the data type before...
Forum: LIVE PLC Questions And Answers January 5th, 2022, 03:09 PM
Replies: 9
Views: 1,997
Posted By RVaughan
Exactly. And it's important to note that...

Exactly. And it's important to note that undocumented changes to the safety system are a big no-no to the PROSECUTOR when Bubba's hand gets ripped off.
Forum: LIVE PLC Questions And Answers January 4th, 2022, 10:21 PM
Replies: 9
Views: 1,997
Posted By RVaughan
It's a checksum for identifying the current...

It's a checksum for identifying the current safety-related software (logic) and hardware configuration. Used on the paperwork certifying machine safety has been checked and verified.
Forum: LIVE PLC Questions And Answers December 14th, 2021, 05:22 PM
Replies: 5
Views: 1,201
Posted By RVaughan
Naturalmente

Naturalmente
Forum: LIVE PLC Questions And Answers December 14th, 2021, 12:24 PM
Replies: 5
Views: 1,201
Posted By RVaughan
For what purpose? Alternative instructions for...

For what purpose?
Alternative instructions for positive edge include the P contact, -[P]-
The P coil, -(P)-
And R_Trig.
Each functions differently, and the help file will explain the differences....
Forum: LIVE PLC Questions And Answers November 16th, 2021, 12:43 PM
Replies: 10
Views: 1,874
Posted By RVaughan
This assignment looks incredibly useful as a...

This assignment looks incredibly useful as a introduction to PLC hardware and functionality.
Also the kind of assignment I would loathe in my school days and perhaps leave unfinished.
Forum: LIVE PLC Questions And Answers October 30th, 2021, 09:46 PM
Replies: 8
Views: 2,961
Posted By RVaughan
Check Task Manager inside the VM and kill any...

Check Task Manager inside the VM and kill any process related to PLCSIm. If Portal thinks PLCSim is running, it prevents use of other adapters.
Forum: LIVE PLC Questions And Answers October 26th, 2021, 07:59 PM
Replies: 34
Views: 3,846
Posted By RVaughan
I know of no better place to ask. This forum is...

I know of no better place to ask. This forum is a treasure.
Forum: LIVE PLC Questions And Answers October 22nd, 2021, 07:13 AM
Replies: 22
Views: 6,592
Posted By RVaughan
First thought is, of course, post the code. ...

First thought is, of course, post the code.
Second thought is, are any of the values stored in Temp variables? Inside optimized blocks the Temps are initialized each block call.
Forum: LIVE PLC Questions And Answers October 21st, 2021, 09:19 AM
Replies: 4
Views: 1,677
Posted By RVaughan
You will want to remember the inertia of bits. ...

You will want to remember the inertia of bits. That is, if a tag is writtten to in one routine, then you stop calling that routine, the tag stays the same value. It doesn't revert to zero just...
Showing results 1 to 25 of 95

 
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