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Search: Posts Made By: Aardwizz
Forum: LIVE PLC Questions And Answers June 3rd, 2020, 07:24 PM
Replies: 5
Views: 604
Posted By Aardwizz
There is a kinda-sorta trick to exceed the 256...

There is a kinda-sorta trick to exceed the 256 word limit on data tables in Logix 500.

There is a S: system variable (I forget which, and don't have the software loaded) that you can set to "Index...
Forum: LIVE PLC Questions And Answers March 17th, 2020, 11:14 AM
Replies: 10
Views: 1,906
Posted By Aardwizz
It all depends on what kind of "testing" you want...

It all depends on what kind of "testing" you want to do.

It is possible to disable all the I/O modules in the PLC program so that that they do not scan. Thus when you download your program, you...
Forum: LIVE PLC Questions And Answers February 6th, 2020, 03:08 PM
Replies: 12
Views: 667
Posted By Aardwizz
I use Simplicity, not Proficy for graphic...

I use Simplicity, not Proficy for graphic editiing, but are you able to right click on the button object and select Properites, instead of merely trying to use the Inspector for the edits?
In...
Forum: LIVE PLC Questions And Answers January 26th, 2020, 01:14 PM
Replies: 9
Views: 936
Posted By Aardwizz
Did you know that Rockwell provides a FREE tool...

Did you know that Rockwell provides a FREE tool called "DLR Tool" that allows you to see the DLR ring IN ORDER, and, if the program was run on a healthy ring so it knows what to expect, can also show...
Forum: LIVE PLC Questions And Answers January 10th, 2020, 02:46 PM
Replies: 15
Views: 1,226
Posted By Aardwizz
Welcome to the Forum!! Instead of using the...

Welcome to the Forum!!

Instead of using the photoeye bit directly in the stop logic of the motor, create a bit that would seal in when the photoeye is detected, and use THAT bit in the stop logic....
Forum: LIVE PLC Questions And Answers December 18th, 2019, 05:07 PM
Replies: 78
Views: 10,237
Posted By Aardwizz
The problem that I have with Timed tasks is when...

The problem that I have with Timed tasks is when something that you want to have as a one-shot (say, to reset all states at the end of an action) needs to affect something in another task.
...
Forum: LIVE PLC Questions And Answers November 25th, 2019, 12:07 PM
Replies: 7
Views: 881
Posted By Aardwizz
The answer is no. There is no way to download to...

The answer is no. There is no way to download to an AB PLC (nor any other brand that I'm aware of) without the development software.

Furthermore, the first step of downloading to an AB PLC...
Forum: LIVE PLC Questions And Answers November 22nd, 2019, 02:59 PM
Replies: 11
Views: 1,048
Posted By Aardwizz
It's more of a GUIDELINE....

Rockwell gives only a warning for duplicate destructive tags, because some programmers (for whatever reason) feel a need to do what you've demonstrated.

I once ran into this code for a one-button...
Forum: LIVE PLC Questions And Answers November 22nd, 2019, 02:46 PM
Replies: 11
Views: 1,048
Posted By Aardwizz
Still a bad idea

Agreed, Keith.

Of course, if someone comes along later, and adds something (a valve, a timer) to one routine but not the other, then James' complaint is valid.

This is why this is such bad...
Forum: LIVE PLC Questions And Answers November 22nd, 2019, 01:46 PM
Replies: 7
Views: 672
Posted By Aardwizz
It's been a long time for me and I don't have the...

It's been a long time for me and I don't have the software installed at the moment to play along, so I don't consciously know how -- I could just do it.

I **think** that what you do is open...
Forum: LIVE PLC Questions And Answers November 22nd, 2019, 10:50 AM
Replies: 7
Views: 672
Posted By Aardwizz
It's been a while since I set up a DeviceNet...

It's been a while since I set up a DeviceNet card, and there's a nifty tool that comes with Logix to make the mapping (somewhat) easier.

The trouble you're having is that each kind of DeviceNet...
Forum: LIVE PLC Questions And Answers November 22nd, 2019, 10:12 AM
Replies: 7
Views: 672
Posted By Aardwizz
To really understand what is going on, you need...

To really understand what is going on, you need to understand what type of I/O module you have plugged into Slot 1 of you Local chassis.

Understand that the BTDs are copying data in groups of 8...
Forum: LIVE PLC Questions And Answers June 17th, 2019, 02:52 PM
Replies: 36
Views: 4,951
Posted By Aardwizz
A colleague once had his laptop struck by...

A colleague once had his laptop struck by lightning. Indoors.

We were commissioning a bakery line, and testing the flour delivery system. Flour is transported by use of a rotary airlock at the...
Forum: LIVE PLC Questions And Answers June 17th, 2019, 11:30 AM
Replies: 8
Views: 859
Posted By Aardwizz
If it was me, I'd add a temperature (and...

If it was me, I'd add a temperature (and humidity) sensor from the outside. If it's cold outside, the cooling towers will be more efficient, so then set the cooling tower (and boiler) setpoint...
Forum: LIVE PLC Questions And Answers April 12th, 2019, 10:06 AM
Replies: 8
Views: 823
Posted By Aardwizz
Depending on circumstances, the PLC may detect an...

Depending on circumstances, the PLC may detect an alarm condition and take an action which then causes the alarm condition to no longer be true. If this happens quickly, the HMI, which is monitoring...
Forum: LIVE PLC Questions And Answers March 17th, 2019, 04:22 AM
Replies: 67
Views: 7,851
Posted By Aardwizz
You are paying me to take the blame after I'm...

You are paying me to take the blame after I'm gone.
Forum: LIVE PLC Questions And Answers January 23rd, 2019, 10:50 AM
Replies: 4
Views: 552
Posted By Aardwizz
It might be easier to skip the UDT, and simply...

It might be easier to skip the UDT, and simply use the AOI's data structure as your drive definitions.

This makes coding super simple.
If you have your INT as in Input parameter to the AOI (with...
Forum: LIVE PLC Questions And Answers January 10th, 2019, 04:48 PM
Replies: 6
Views: 805
Posted By Aardwizz
It really depends on what you mean by "recipe". ...

It really depends on what you mean by "recipe".

For some, a recipe is just the "amounts" -- setpoints for time, speed, temperature, etc.

For others, a recipe is all that PLUS the sequence of...
Forum: LIVE PLC Questions And Answers December 30th, 2018, 03:52 PM
Replies: 58
Views: 7,228
Posted By Aardwizz
My RESPONSE to the funniest thing I heard was: ...

My RESPONSE to the funniest thing I heard was:

"You want it by WHEN?"

I couldn't stop laughing....
Forum: LIVE PLC Questions And Answers December 27th, 2018, 11:12 AM
Replies: 8
Views: 1,056
Posted By Aardwizz
N35 is not "an analog file", per se. It is...

N35 is not "an analog file", per se. It is merely an array of addressable integers, which can be addressed at the bit, word, or group-of-words ("file") level. There is nothing odd about using a bit...
Forum: LIVE PLC Questions And Answers December 21st, 2018, 11:23 AM
Replies: 6
Views: 703
Posted By Aardwizz
Instead of moving a zero into the .LEN of the...

Instead of moving a zero into the .LEN of the Read string, why not just CPS a "blank" string (no data, zero length) into the Read string after the storage CPS?

The problem could be with how the...
Forum: LIVE PLC Questions And Answers December 15th, 2018, 10:11 AM
Replies: 4
Views: 907
Posted By Aardwizz
There are two pieces to this puzzle: sequencing...

There are two pieces to this puzzle: sequencing and visualization.

parky talked breifly on sequencing. Basically, you need to create your own sequencer that will read an array (or structure) of...
Forum: LIVE PLC Questions And Answers December 14th, 2018, 12:21 PM
Replies: 9
Views: 1,399
Posted By Aardwizz
A simple method is to create a routine with all...

A simple method is to create a routine with all the code you like, including AOIs and whatnot.

In the program tree, right click on it and select "Export Routine". This could be saved in your...
Forum: LIVE PLC Questions And Answers December 14th, 2018, 12:05 PM
Replies: 25
Views: 1,672
Posted By Aardwizz
I have a system similar to yours: a stand-alone...

I have a system similar to yours: a stand-alone "box" that supplies cooled / heated glycol to a tank jacket, and a desire to control the temperature in the tank. Long delays before the temperate...
Forum: LIVE PLC Questions And Answers December 7th, 2018, 01:25 PM
Replies: 13
Views: 1,194
Posted By Aardwizz
Essentially, it's useless. The OP was insisting...

Essentially, it's useless. The OP was insisting that AB work like he's used to with Siemens, where he could drop a timer block on a rung and have the output of the block not be "hot" until the timer...
Showing results 1 to 25 of 227

 
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