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Search: Posts Made By: Mispeld
Forum: LIVE PLC Questions And Answers February 18th, 2018, 11:37 AM
Replies: 16
Views: 307
Posted By Mispeld
There is a wealth of information on the topic of...

There is a wealth of information on the topic of connections in chapter 4 of this manual:

Ethernet Design Considerations...
Forum: LIVE PLC Questions And Answers February 16th, 2018, 11:51 AM
Replies: 11
Views: 420
Posted By Mispeld
From the FTVS development environment, you can...

From the FTVS development environment, you can right-click and zoom out. Unfortunately it does not appear to go to a specified percent, rather something like 50%. I could not find out how to set the...
Forum: LIVE PLC Questions And Answers February 16th, 2018, 08:50 AM
Replies: 18
Views: 420
Posted By Mispeld
+1

+1
Forum: LIVE PLC Questions And Answers February 13th, 2018, 05:13 PM
Replies: 7
Views: 250
Posted By Mispeld
I'm going to assume the network being connected...

I'm going to assume the network being connected through via the wireless adapter is not the same one that the NATs expose their private-network PLCs to. Otherwise you could just come in through...
Forum: LIVE PLC Questions And Answers February 11th, 2018, 10:38 AM
Replies: 15
Views: 479
Posted By Mispeld
Yes! Much cleaner than the approach I have seen...

Yes! Much cleaner than the approach I have seen (and perpetuated) involving a JMP instruction to force transitional instructions to execute on every scan of the routine/program. I have always been...
Forum: LIVE PLC Questions And Answers February 10th, 2018, 02:41 PM
Replies: 15
Views: 479
Posted By Mispeld
Yeah. One follow-up question: Why the reset...

Yeah. One follow-up question: Why the reset immediately before the AVE instruction? While I am a fan of defensive programming, I am wondering what unintended situation this reset prevents.
Forum: LIVE PLC Questions And Answers February 9th, 2018, 02:58 PM
Replies: 9
Views: 262
Posted By Mispeld
Are you certain all three AENT adapters have...

Are you certain all three AENT adapters have different IP addresses? And are they static IPs?
Forum: LIVE PLC Questions And Answers February 8th, 2018, 08:03 AM
Replies: 4
Views: 119
Posted By Mispeld
Is Labview sending a delimiter (e.g., carriage...

Is Labview sending a delimiter (e.g., carriage return) character to signal end of transmission? If so, and you are using a 1734-232ASC module, you will want to define the specific delimiter on the...
Forum: LIVE PLC Questions And Answers February 7th, 2018, 08:34 AM
Replies: 3
Views: 166
Posted By Mispeld
First Order: Adv - Easy to implement, easy to...

First Order:
Adv - Easy to implement, easy to model, minimal program memory req'd
Disadv - "Flier" data takes a long time to settle out (i.e., infinite impulse response), may require long lag time...
Forum: LIVE PLC Questions And Answers February 5th, 2018, 04:24 PM
Replies: 26
Views: 643
Posted By Mispeld
Since the code looks reasonable and data usage...

Since the code looks reasonable and data usage within the program was checked, it seems like time to think about "fringe" explanations. I've got two: (1) there is something externally manipulating...
Forum: LIVE PLC Questions And Answers January 23rd, 2018, 02:42 PM
Replies: 8
Views: 217
Posted By Mispeld
The L5K only contains user defined types in this...

The L5K only contains user defined types in this format, not module defined types.

For what it's worth, I did find the attached UDT yields the following datatype in the L5K:

DATATYPE...
Forum: LIVE PLC Questions And Answers January 23rd, 2018, 01:54 PM
Replies: 8
Views: 217
Posted By Mispeld
The following Rockwell Technote discusses UDT...

The following Rockwell Technote discusses UDT memory allocation:

RSLogix 5000 User Defined data types (UDT) (https://rockwellautomation.custhelp.com/app/answers/detail/a_id/23926/related/1)...
Forum: LIVE PLC Questions And Answers January 19th, 2018, 03:45 PM
Replies: 14
Views: 1,400
Posted By Mispeld
In looking at the Microsoft patch list for...

In looking at the Microsoft patch list for Windows 7/Server 2008 SP1, none of those KB updates identified as causing FactoryTalk problems are listed as applicable to Window 7. (However, I did not...
Forum: LIVE PLC Questions And Answers January 18th, 2018, 02:28 PM
Replies: 4
Views: 247
Posted By Mispeld
Well, I assumed it included CIP messaging, and in...

Well, I assumed it included CIP messaging, and in the following situation I tested it to be a good assumption.

I set up a "CIP Data Table Write" MSG from one Logix processor to another. With the...
Forum: LIVE PLC Questions And Answers January 18th, 2018, 01:18 PM
Replies: 4
Views: 247
Posted By Mispeld
One way to sort this out is with "external...

One way to sort this out is with "external access" in the tag properties. If it is set to "None" or "Read Only," the value must be changing by internal logic. If this is the case, do a...
Forum: LIVE PLC Questions And Answers January 16th, 2018, 09:46 AM
Replies: 13
Views: 528
Posted By Mispeld
This is wrong with respect to produced/consumed...

This is wrong with respect to produced/consumed tags. The problem I experienced was explicit message (MSG) failure when source and destination tags had differently named UDTs. (extended error code...
Forum: LIVE PLC Questions And Answers January 16th, 2018, 08:37 AM
Replies: 13
Views: 528
Posted By Mispeld
I'm curious as to the firmware rev of the...

I'm curious as to the firmware rev of the consumer? In rev 20 and earlier I have definitely run into connection failure until I made sure the UDT was identically named on both sides.
Forum: LIVE PLC Questions And Answers January 12th, 2018, 11:06 PM
Replies: 13
Views: 528
Posted By Mispeld
While it is tempting to just point toward a bunch...

While it is tempting to just point toward a bunch of Rockwell manuals, which explain these topics in great detail, that would be someplace to go when it is time to put these tools into practice.
...
Forum: LIVE PLC Questions And Answers January 11th, 2018, 04:13 PM
Replies: 7
Views: 317
Posted By Mispeld
If we were talking Allen-Bradley, the simpler way...

If we were talking Allen-Bradley, the simpler way for the same result would be to directly implement the PID calculation directly in logic instead of using the PID instruction. There are examples of...
Forum: LIVE PLC Questions And Answers January 11th, 2018, 02:17 PM
Replies: 17
Views: 461
Posted By Mispeld
If I were faced with this measurement task, which...

If I were faced with this measurement task, which sounds like total volume for a short-duration flow event, I would go ahead and try the existing setup with a "field calibration" if practical. By...
Forum: LIVE PLC Questions And Answers January 11th, 2018, 11:42 AM
Replies: 17
Views: 461
Posted By Mispeld
This is true with respect to part about favoring...

This is true with respect to part about favoring a totalizer pulse over integrating a sampled analog input. But the main point I was trying to make is error related to measuring the physical process...
Forum: LIVE PLC Questions And Answers January 11th, 2018, 10:49 AM
Replies: 17
Views: 461
Posted By Mispeld
While the OP question was about the accuracy of...

While the OP question was about the accuracy of timing capability of the L71 processor, it is in the context of accurately totalizing (integrating) a sampled input signal. I would say that the error...
Forum: LIVE PLC Questions And Answers January 10th, 2018, 09:06 AM
Replies: 18
Views: 553
Posted By Mispeld
There are two topics running in this thread: (1)...

There are two topics running in this thread: (1) how to set up an instrument per the manufacturer's instructions, and (2) how direct process measurements are used to compute a derived measurement.
...
Forum: LIVE PLC Questions And Answers January 9th, 2018, 10:17 AM
Replies: 18
Views: 553
Posted By Mispeld
On second thought, yes, this is a problem. This...

On second thought, yes, this is a problem. This selection, according to the last Prowirl I set up are, "bar" and "psi" leaving it ambiguous to whether absolute or gauge units. You may need to call...
Forum: LIVE PLC Questions And Answers January 9th, 2018, 10:04 AM
Replies: 18
Views: 553
Posted By Mispeld
When you set up the external input on the...

When you set up the external input on the Prowirl, the zero (4 ma), span (20 ma), and engineering units are required setup values based on calibration of the external pressure instrument. The...
Showing results 1 to 25 of 239

 
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