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Search: Posts Made By: mk42
Forum: LIVE PLC Questions And Answers Yesterday, 01:15 PM
Replies: 1
Views: 120
Posted By mk42
Before we get into the relevant part of your...

Before we get into the relevant part of your question, in a Siemens PLC, DB means Data Block, not database. Just FYI, not actually important.



If you set up the alarms as an array[1..4] of...
Forum: LIVE PLC Questions And Answers Yesterday, 09:17 AM
Replies: 21
Views: 435
Posted By mk42
I think the difference between what I said and...

I think the difference between what I said and what you said is that for you, it sounds like each mode might control different outputs. In my example, each mode controls the same outputs.


In...
Forum: LIVE PLC Questions And Answers Yesterday, 08:41 AM
Replies: 21
Views: 435
Posted By mk42
The only times I've seen conditional logic really...

The only times I've seen conditional logic really make sense are when you are flipping between modes, and all the modes use the same tags/IO etc. This could be something like having one section of...
Forum: LIVE PLC Questions And Answers Yesterday, 08:22 AM
Replies: 5
Views: 153
Posted By mk42
As others have said, each FB uses its own...

As others have said, each FB uses its own instance DB, especially if they are different FBs. If you want the data stored in the same DB, use the multi instance function mentioned by others.


...
Forum: LIVE PLC Questions And Answers February 14th, 2019, 01:56 PM
Replies: 6
Views: 269
Posted By mk42
I've used similar devices from Hilscher to allow...

I've used similar devices from Hilscher to allow communication between two PLCs in neighboring cells. They support a variety of communication types. They've been great.



However, if you're...
Forum: LIVE PLC Questions And Answers February 14th, 2019, 10:11 AM
Replies: 10
Views: 453
Posted By mk42
Managed switches used to be vital to an EIP...

Managed switches used to be vital to an EIP network to use IGMP snooping to make the EIP traffic sane. Unicast IO has mostly made IGMP snooping redundant, but it is far from the most useful feature...
Forum: LIVE PLC Questions And Answers February 14th, 2019, 08:50 AM
Replies: 16
Views: 548
Posted By mk42
Fair point. It also seemed odd that he was...

Fair point. It also seemed odd that he was referring to in1/in2 vs Hi_lim/Lo_Lim.


I'd still need to see data sheets on the sensors to be able to say anything for sure. Agree that we all seem...
Forum: LIVE PLC Questions And Answers February 13th, 2019, 11:54 AM
Replies: 16
Views: 548
Posted By mk42
My confused guess is that you wouldn't get 0 from...

My confused guess is that you wouldn't get 0 from whatever it is reading now. I would think you would take the value from the sensor when the system is at rest (say, maybe on machine power on), and...
Forum: LIVE PLC Questions And Answers February 12th, 2019, 11:25 AM
Replies: 4
Views: 159
Posted By mk42
Every Profisafe device has a unique address that...

Every Profisafe device has a unique address that has to be downloaded directly to it. If you ever used the old ET200S IO, that was the dip switches on the side. Here, the address is downloaded...
Forum: LIVE PLC Questions And Answers February 7th, 2019, 04:59 PM
Replies: 3
Views: 246
Posted By mk42
Pff, no idea there. The real answer is probably...

Pff, no idea there. The real answer is probably some huge customer demanded it, and it made sense for some specific thing they were doing.




2 things I saw:


Your VLAN configuration...
Forum: LIVE PLC Questions And Answers February 7th, 2019, 04:40 PM
Replies: 6
Views: 218
Posted By mk42
What is your setup for the device configuration...

What is your setup for the device configuration of the IPC?


You need to configure one of the Ethernet interfaces on your IPC. Under each Ethernet interface, there is an Interface Assignment...
Forum: LIVE PLC Questions And Answers February 6th, 2019, 05:09 PM
Replies: 3
Views: 246
Posted By mk42
NAT is pretty much an afterthought in the XC200...

NAT is pretty much an afterthought in the XC200 switches. Also, the manual warns that NAT uses a ton of processing power, and you run into bandwidth limits pretty fast.

If you're looking for...
Forum: LIVE PLC Questions And Answers February 4th, 2019, 11:35 AM
Replies: 12
Views: 563
Posted By mk42
I think this is one of the newer gen mobile...

I think this is one of the newer gen mobile panels; they are the only ones I know of with the F in the name KTP700F.


I REALLY wish Siemens had done something like 710 for 7 inch basic, 720 for 7...
Forum: LIVE PLC Questions And Answers February 4th, 2019, 08:33 AM
Replies: 12
Views: 563
Posted By mk42
In the help file, most of the recommended...

In the help file, most of the recommended resolutions are 640x480 or less.





To be fair, a lot of what you're paying is the difference between an industrial rated device with a promised long...
Forum: LIVE PLC Questions And Answers February 2nd, 2019, 09:01 AM
Replies: 12
Views: 563
Posted By mk42
You say you minimized the resolution, what is it...

You say you minimized the resolution, what is it at now? What codec are you using? What is the frame rate of the video?

If you poke around in the help file, you'll see a number of cameras that...
Forum: LIVE PLC Questions And Answers February 1st, 2019, 01:18 PM
Replies: 8
Views: 315
Posted By mk42
Not in safety in Siemens, or he couldn't figure...

Not in safety in Siemens, or he couldn't figure out any way except how he had done it with jumps. Off the top of my head, I can't think of a better way.

I'd be very curious to see your suggestion...
Forum: LIVE PLC Questions And Answers February 1st, 2019, 01:15 PM
Replies: 6
Views: 206
Posted By mk42
It should

It should
Forum: LIVE PLC Questions And Answers February 1st, 2019, 11:53 AM
Replies: 6
Views: 206
Posted By mk42
P1 and P2 are the same interface, which means...

P1 and P2 are the same interface, which means they share an IP.

You could maybe do it with a communications card added. I think the CP1243-1 might work, depending on what type of communication...
Forum: LIVE PLC Questions And Answers January 30th, 2019, 03:07 PM
Replies: 8
Views: 267
Posted By mk42
I would think it would be the other way around. ...

I would think it would be the other way around. Codesys basically exists to be brand labeled; I think twincat 3 is codesys 3?

^information above is not based on actual first hand knowledge, but...
Forum: LIVE PLC Questions And Answers January 30th, 2019, 11:22 AM
Replies: 8
Views: 267
Posted By mk42
I think there was a revision to IEC 61131-3 in...

I think there was a revision to IEC 61131-3 in the past decade that added a bunch of advanced object oriented features that I haven't seen catch on much. UNION could be part of that, maybe?

I've...
Forum: LIVE PLC Questions And Answers January 29th, 2019, 02:18 PM
Replies: 50
Views: 2,875
Posted By mk42
even more off topic, I hate it when my coworkers...

even more off topic, I hate it when my coworkers send me a message asking about something, and it is cryptic, full of half typed abbreviations and misspelled words. They then proceed waste more time...
Forum: LIVE PLC Questions And Answers January 29th, 2019, 11:35 AM
Replies: 5
Views: 285
Posted By mk42
AHA! They are groups of multiple objects...

AHA!

They are groups of multiple objects that were added to the library as one item.

Normally, if you select multiple objects and drag them to the library, they all get added.

If you hold...
Forum: LIVE PLC Questions And Answers January 29th, 2019, 10:29 AM
Replies: 17
Views: 328
Posted By mk42
I guess that could be one of its uses, but...

I guess that could be one of its uses, but there's a big difference.

AT works on the data wherever it is (although last I heard it is of limited use in Optimized code). Whereas...
Forum: LIVE PLC Questions And Answers January 29th, 2019, 09:55 AM
Replies: 17
Views: 328
Posted By mk42
For what I've used them for,...

For what I've used them for, Serialize/Deserialize take a UDT/Struct, and add it to an array (usually an array of bytes?), or remove that struct from the array. This is useful if you want to put a...
Forum: LIVE PLC Questions And Answers January 29th, 2019, 09:50 AM
Replies: 5
Views: 285
Posted By mk42
I've never seen that before, sorry! Really...

I've never seen that before, sorry! Really curious to hear the answer, though.
Showing results 1 to 25 of 500

 
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