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Search: Posts Made By: mk42
Forum: LIVE PLC Questions And Answers October 15th, 2018, 07:49 AM
Replies: 3
Views: 88
Posted By mk42
Are you trying to move the whole array? If you,...

Are you trying to move the whole array? If you, you can just use MOVE. When it asks you to enter the element, just use none. Individual elements would be arrayname[XXX], but you can access the...
Forum: LIVE PLC Questions And Answers October 15th, 2018, 07:43 AM
Replies: 7
Views: 146
Posted By mk42
What do you mean when you say a "low delay"...

What do you mean when you say a "low delay" webcam feed? Would, say, 1 second be acceptable delay? I haven't seen many realtime videostreaming systems, there's usually some buffering to make it look...
Forum: LIVE PLC Questions And Answers October 13th, 2018, 01:33 PM
Replies: 5
Views: 327
Posted By mk42
I don't work with pneumatics as much, so I can't...

I don't work with pneumatics as much, so I can't answer that half. I'm also not as familiar with the specific US standards.

However, I've used a number of drives (usually servo drives) that have...
Forum: LIVE PLC Questions And Answers October 13th, 2018, 01:17 PM
Replies: 5
Views: 249
Posted By mk42
My guess is that the drawing was probably put...

My guess is that the drawing was probably put together by someone who didn't have a clue what they are doing. The first question shouldn't be "can the switch do this?"; it should be "what are they...
Forum: LIVE PLC Questions And Answers October 5th, 2018, 02:20 PM
Replies: 4
Views: 202
Posted By mk42
I don't think your image came through, to see...

I don't think your image came through, to see what you're showing.

Is the byte in the F-IO DB?
Forum: LIVE PLC Questions And Answers October 4th, 2018, 01:54 PM
Replies: 6
Views: 255
Posted By mk42
The "difference" could simply be brand, or even...

The "difference" could simply be brand, or even just different translations.

I've never heard of "shelving" alarms, and if someone asked me to disable an alarm vs suppress an alarm, I'd assume...
Forum: LIVE PLC Questions And Answers October 4th, 2018, 01:50 PM
Replies: 4
Views: 256
Posted By mk42
The answer is that it is unlikely. It may be that...

The answer is that it is unlikely. It may be that your Client software ALSO supports UA in addition to DA, but it would be separate code doing each protocol.

The protocols come from the same...
Forum: LIVE PLC Questions And Answers October 4th, 2018, 09:29 AM
Replies: 8
Views: 279
Posted By mk42
I don't know anything about this spec...

I don't know anything about this spec specifically, but something else to consider is that not all the spec numbers have the same context. They could be the best case max (you definitely won't be...
Forum: LIVE PLC Questions And Answers October 3rd, 2018, 10:47 AM
Replies: 4
Views: 177
Posted By mk42
Weird. Maybe communications takes more time to...

Weird. Maybe communications takes more time to get established after a download? Does it start give another message saying that communications are started up after that one?

There are system...
Forum: LIVE PLC Questions And Answers October 3rd, 2018, 07:32 AM
Replies: 4
Views: 177
Posted By mk42
I've seen a checkbox for "enable logging at...

I've seen a checkbox for "enable logging at runtime start", but that's the default, and it sounds like its already doing that. That's wierd behavior, it seems like starting runtime after a DL would...
Forum: LIVE PLC Questions And Answers October 3rd, 2018, 07:24 AM
Replies: 19
Views: 829
Posted By mk42
The speculation I heard that makes sense to me is...

The speculation I heard that makes sense to me is that Emerson is trying to fill the machine automation/motion control gap in its portfolio. Trying to acquire Rockwell recently targeted that same...
Forum: LIVE PLC Questions And Answers September 27th, 2018, 09:56 PM
Replies: 6
Views: 342
Posted By mk42
I've seen IO link masters that support anywhere...

I've seen IO link masters that support anywhere from 4 to 16 IO link ports. I think one IO link port can handle up to 16 digital inputs, or one analog/smart sensor.

I've never used the Murr cube...
Forum: LIVE PLC Questions And Answers September 27th, 2018, 09:45 PM
Replies: 19
Views: 1,068
Posted By mk42
The usual design cycle I see over here is "Sil 3...

The usual design cycle I see over here is "Sil 3 is the best, I need a SIL 3 safety system." And then you buy a safety PLC, safety IO, wire it up, and see if it works.

Note that nowhere in there...
Forum: LIVE PLC Questions And Answers September 27th, 2018, 10:48 AM
Replies: 19
Views: 1,068
Posted By mk42
In the US, pretty much everybody who touched the...

In the US, pretty much everybody who touched the machine gets hauled into court. It's less a matter of "innocent/guilty" or "liable/not liable", and more a matter of "how much is each party going to...
Forum: LIVE PLC Questions And Answers September 26th, 2018, 11:27 AM
Replies: 19
Views: 1,068
Posted By mk42
For what it's worth, we do have NFPA79, but I've...

For what it's worth, we do have NFPA79, but I've always gotten the impression that it was more of a requirement by insurance companies than the government. They don't really care about people...
Forum: LIVE PLC Questions And Answers September 26th, 2018, 11:21 AM
Replies: 10
Views: 758
Posted By mk42
I will note that, specifically, a standard...

I will note that, specifically, a standard CompactLogix is not a safety PLC. However, AB has the Guardlogix family which is versions of its CPUs that can do both safety and standard.

I can't...
Forum: LIVE PLC Questions And Answers September 26th, 2018, 10:50 AM
Replies: 29
Views: 756
Posted By mk42
Well, if it does, then that would be the easy way...

Well, if it does, then that would be the easy way to go. It might have in Simatic Manager, but I don't think it does in TIA Portal.



Yeah, not saying pointers are impossible in LAD, just...
Forum: LIVE PLC Questions And Answers September 25th, 2018, 08:31 PM
Replies: 10
Views: 758
Posted By mk42
Safety PLCs are very reliable and very safe. I've...

Safety PLCs are very reliable and very safe. I've never used that specific model, but I've seen plenty of systems with fail safe PLCs from both Rockwell (like yours) and Siemens. The whole principle...
Forum: LIVE PLC Questions And Answers September 25th, 2018, 12:34 PM
Replies: 19
Views: 1,068
Posted By mk42
From what I've seen in my career here in the US,...

From what I've seen in my career here in the US, there really isn't any proactive enforcement of machinery safety. Official enforcement tends to be of the "if no one got hurt, it must have been...
Forum: LIVE PLC Questions And Answers September 25th, 2018, 09:33 AM
Replies: 10
Views: 758
Posted By mk42
That's my thought, though it may also depend how...

That's my thought, though it may also depend how you document it.

If you document it as 6 safety functions (Motor stops if Estop 1 is pushed, motor stops if estop 2 is pushed, etc), that seems...
Forum: LIVE PLC Questions And Answers September 25th, 2018, 09:29 AM
Replies: 10
Views: 405
Posted By mk42
Jesper edited his post to note that S7 Lite isn't...

Jesper edited his post to note that S7 Lite isn't available any more. If you download Step 7 (current version is 5.6), it comes with a free trial that lasts for a couple week. After that, you'll...
Forum: LIVE PLC Questions And Answers September 25th, 2018, 09:22 AM
Replies: 29
Views: 756
Posted By mk42
It is stupidly complex. I think the thought...

It is stupidly complex. I think the thought process in Germany was "I thought of a really powerful way to do just about anything possible (Openness). Why would anyone else want another option?". ...
Forum: LIVE PLC Questions And Answers September 25th, 2018, 08:59 AM
Replies: 29
Views: 756
Posted By mk42
Note that newer features like indirectly...

Note that newer features like indirectly addressing arrays in LAD are only for the newer CPU's like the 1200 & 1500. If you're using the older 300/400 CPUs (including WinAC RTX), then most of the...
Forum: LIVE PLC Questions And Answers September 24th, 2018, 01:33 PM
Replies: 15
Views: 597
Posted By mk42
Hah, oops, when I said "leading questions" I...

Hah, oops, when I said "leading questions" I meant "giving them questions that are easy to answer/turn into a discussion", like a "softball" question. Sorta like on late night interview shows, how...
Forum: LIVE PLC Questions And Answers September 24th, 2018, 01:28 PM
Replies: 10
Views: 758
Posted By mk42
Warning: I hang out with serious safety guys...

Warning: I hang out with serious safety guys regularly, but I only dabble myself.

I THINK that you model each "safety function", but I guess that just pushes the question back a step.

My guess...
Showing results 1 to 25 of 500

 
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