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Search: Posts Made By: Ken Roach
Forum: LIVE PLC Questions And Answers Yesterday, 08:53 PM
Replies: 7
Views: 211
Posted By Ken Roach
One more thing: I don't know you or your...

One more thing:

I don't know you or your experience and skill, but I am going to repeat my recommendation that emergency shutdown systems are not appropriate for novice engineers and technicians...
Forum: LIVE PLC Questions And Answers Yesterday, 08:34 PM
Replies: 7
Views: 211
Posted By Ken Roach
Thank you for that photo ! there is very...

Thank you for that photo !

there is very probably some confusion between the term "Chassis" and the term "Rack".

The label above that chassis says "ESD PLC RACK 3". I cannot tell if it is...
Forum: LIVE PLC Questions And Answers Yesterday, 05:23 PM
Replies: 7
Views: 211
Posted By Ken Roach
The A-B Universal Remote I/O system originated...

The A-B Universal Remote I/O system originated with the PLC-2 and PLC-5 controllers, where an 8-slot physical chassis was considered a "Rack".

So the addresses for those are numbered, starting...
Forum: LIVE PLC Questions And Answers Yesterday, 04:29 PM
Replies: 7
Views: 211
Posted By Ken Roach
You have quite a challenge ahead of you: most...

You have quite a challenge ahead of you: most systems that use Redundancy are complex and control hazardous processes, and should be programmed and maintained by experienced and qualified persons...
Forum: LIVE PLC Questions And Answers September 28th, 2022, 08:19 PM
Replies: 2
Views: 143
Posted By Ken Roach
In the main Settings tab, select Communications...

In the main Settings tab, select Communications (the top and default item) from the left menu, then there will be a drop-down menu of serial and Ethernet protocols.

Modbus/TCP is just the "Modbus"...
Forum: LIVE PLC Questions And Answers September 28th, 2022, 06:43 PM
Replies: 2
Views: 181
Posted By Ken Roach
PRP versus DLR

I think you understand the basics.

There are two different ways to get media fault tolerance in a ControlLogix EtherNet/IP network, and each of those modules supports one of them.

The modules...
Forum: LIVE PLC Questions And Answers September 27th, 2022, 08:02 PM
Replies: 5
Views: 384
Posted By Ken Roach
Which exact types of PLC controllers are you...

Which exact types of PLC controllers are you using ? The error codes suggest ControlLogix/CompactLogix but I'd like to know for sure.

What are the exact addresses and data types in each...
Forum: LIVE PLC Questions And Answers September 26th, 2022, 09:23 PM
Replies: 4
Views: 268
Posted By Ken Roach
Third-party device integration and testing was my...

Third-party device integration and testing was my favorite part of my job back in the Rockwell days.

Some of the guys down the hall at Fives did torture testing with ControlLogix, Baluff IOLink,...
Forum: LIVE PLC Questions And Answers September 26th, 2022, 09:07 PM
Replies: 4
Views: 268
Posted By Ken Roach
If you've got a local relay output handy, you...

If you've got a local relay output handy, you could run a powerup time-to-connect test. Write some logic to run it a hundred times and give them some statistics.

Do a "what happens to the input...
Forum: LIVE PLC Questions And Answers September 26th, 2022, 03:28 PM
Replies: 2
Views: 253
Posted By Ken Roach
Welcome to the PLCTalk forum community! You've...

Welcome to the PLCTalk forum community! You've chosen a tricky debut question.

The discrete and analog I/O modules that have a direct Rockwell equivalent should work with a ControlLogix...
Forum: LIVE PLC Questions And Answers September 26th, 2022, 02:50 PM
Replies: 3
Views: 370
Posted By Ken Roach
The built-in MSG function blocks...

The built-in MSG function blocks (https://literature.rockwellautomation.com/idc/groups/literature/documents/qs/2080-qs002_-en-e.pdf) for the Micro 800 controllers only support ControlLogix tag...
Forum: LIVE PLC Questions And Answers September 23rd, 2022, 12:38 PM
Replies: 5
Views: 525
Posted By Ken Roach
Thanks for those details ! I agree that you've...

Thanks for those details ! I agree that you've probably done everything correctly.

Can you put a scope on the DC power and DC common on the analog wiring ? A very noisy signal can bleed over...
Forum: LIVE PLC Questions And Answers September 23rd, 2022, 11:46 AM
Replies: 5
Views: 525
Posted By Ken Roach
Did you insert the module with the backplane...

Did you insert the module with the backplane powered up ? That could have damaged it all by itself.

I would do a cleanup of the backplane and the module connectors with canned air and isopropyl...
Forum: LIVE PLC Questions And Answers September 20th, 2022, 04:43 PM
Replies: 2
Views: 442
Posted By Ken Roach
Welcome to the PLCTalk forum community ! In...

Welcome to the PLCTalk forum community !

In a PLC-5, an "array" is defined by a Data Table file. These have data types (the most common is a 16-bit signed integer) and Data Table File Numbers.
...
Forum: LIVE PLC Questions And Answers September 19th, 2022, 08:52 PM
Replies: 0
Views: 316
Posted By Ken Roach
Has anyone used the Wago CC100 ?

I've been getting some advertising related to the attractively packaged Wago Compact Controller, model CC100, lately.

As far as I can tell it's a small packaged version similar to a 750-series...
Forum: LIVE PLC Questions And Answers September 19th, 2022, 02:51 PM
Replies: 7
Views: 1,013
Posted By Ken Roach
Thank you AJZ for pointing that out. There...

Thank you AJZ for pointing that out.

There is a specific bug in the Alarm List object that somehow scrambles the date and time shown in that object, and it affects only PV+7 Series B.

The...
Forum: LIVE PLC Questions And Answers September 16th, 2022, 06:54 PM
Replies: 7
Views: 1,013
Posted By Ken Roach
That's an interesting problem ! What is the...

That's an interesting problem !

What is the exact PV+ hardware ? If it's v12 I assume it's a PV+7, but the Series letter might matter with regard to exactly which firmware and operating system...
Forum: LIVE PLC Questions And Answers September 15th, 2022, 05:39 PM
Replies: 11
Views: 912
Posted By Ken Roach
What's keeping you from using 1734-AENT and POINT...

What's keeping you from using 1734-AENT and POINT I/O ?
Forum: LIVE PLC Questions And Answers September 15th, 2022, 04:40 PM
Replies: 25
Views: 2,561
Posted By Ken Roach
Possibility 1: A technician or contractor made...

Possibility 1: A technician or contractor made changes to the controller and saved them in the EEPROM, and the customer is not telling you the whole story.

Possibility 2: Electromagnetic...
Forum: LIVE PLC Questions And Answers September 15th, 2022, 02:34 PM
Replies: 16
Views: 1,037
Posted By Ken Roach
Are there OTL (Output Latch) instructions for...

Are there OTL (Output Latch) instructions for those BOOL tags, instead of Output Examine (OTE) instructions ?

Alarms and Faults are exactly the kind of tags that I frequently use OTL's on, to...
Forum: LIVE PLC Questions And Answers September 14th, 2022, 05:56 PM
Replies: 4
Views: 1,048
Posted By Ken Roach
That would not have been my guess ! Thank you...

That would not have been my guess ! Thank you for posting that feedback and followup.

By default when you create a remote 1756 chassis in the I/O tree, there is a Rack Optimized connection to...
Forum: LIVE PLC Questions And Answers September 14th, 2022, 02:48 AM
Replies: 7
Views: 819
Posted By Ken Roach
Welcome to the PLCTalk Forum community ! ...

Welcome to the PLCTalk Forum community !

Unfortunately, most small PLC controllers lack the computing power to directly act as an SQL client. Those that do are typically based on Linux, rather...
Forum: LIVE PLC Questions And Answers September 13th, 2022, 02:16 PM
Replies: 1
Views: 508
Posted By Ken Roach
Do you have a photo or other documentation about...

Do you have a photo or other documentation about it ? Is it in service ?

I think of myself as very experienced in A-B history, but I've never heard of a Series 10000 controller.

The very...
Forum: LIVE PLC Questions And Answers September 12th, 2022, 11:00 PM
Replies: 6
Views: 1,047
Posted By Ken Roach
You should be able to use modern ControlFlash to...

You should be able to use modern ControlFlash to update the firmware in that MicroLogix controller. As far as I know, any MicroLogix 1200 controller built in the past 22 years will accept the...
Forum: LIVE PLC Questions And Answers September 12th, 2022, 03:22 PM
Replies: 5
Views: 926
Posted By Ken Roach
I can confirm that RSEmulate 500 will emulate the...

I can confirm that RSEmulate 500 will emulate the Channel 0 serial port, but not the Channel 1 Ethernet port.



Of all the things that are difficult or impossible to emulate, embedded TCP/IP...
Showing results 1 to 25 of 500

 
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