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Search: Posts Made By: Ken Roach
Forum: LIVE PLC Questions And Answers Yesterday, 10:10 PM
Replies: 4
Views: 102
Posted By Ken Roach
Thank you for the followup ! I had...

Thank you for the followup !

I had something like that last week; the product changed from a 26-pin I/O port to a 25-pin I/O port in October 2008 but the part number stayed identical and...
Forum: LIVE PLC Questions And Answers July 13th, 2018, 06:23 PM
Replies: 3
Views: 227
Posted By Ken Roach
They are physically slightly different; the CF...

They are physically slightly different; the CF card slot was moved from the bottom to the front, the serial port is in a different location, and they use slightly different RAM backup batteries.
...
Forum: LIVE PLC Questions And Answers July 13th, 2018, 02:45 PM
Replies: 8
Views: 320
Posted By Ken Roach
I admit I was only alluding to one of the issues...

I admit I was only alluding to one of the issues I've encountered: the difference between I/O and ordinary messaging.

Modbus/TCP is nice and robust because it relies on good old TCP. Dropped...
Forum: LIVE PLC Questions And Answers July 13th, 2018, 01:57 PM
Replies: 8
Views: 320
Posted By Ken Roach
The first thing you would do is stop and ask...

The first thing you would do is stop and ask yourself why you're planning on using wireless.

I've lost track of the number of times I've clenched my fist and mentally calmed myself down while...
Forum: LIVE PLC Questions And Answers July 13th, 2018, 11:28 AM
Replies: 4
Views: 186
Posted By Ken Roach
Welcome to the PLCTalk forum community ! You...

Welcome to the PLCTalk forum community !

You said that RSNetworx "uploads parameters until parameter 101 and it gives an error!".

What is the exact text of the error message ?

In RSNetworx,...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 07:15 PM
Replies: 18
Views: 2,811
Posted By Ken Roach
Why so bulky ? Get a DigiSpark ATTiny85...

Why so bulky ? Get a DigiSpark ATTiny85...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 04:26 PM
Replies: 2
Views: 86
Posted By Ken Roach
The PanelView Standard terminals could not run...

The PanelView Standard terminals could not run applications from the Flash card, nor transfer them automatically. You had to access the configuration mode, then perform a Save to Card or a...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 03:13 PM
Replies: 10
Views: 284
Posted By Ken Roach
That +24V auxiliary power supply terminal on the...

That +24V auxiliary power supply terminal on the 1746-P2 is only rated to supply 200 mA. I've definitely seen a short circuit on that cause the PSU to "crowbar" and shut down the PLC.

Replacing...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 01:15 PM
Replies: 10
Views: 421
Posted By Ken Roach
I use VMWare Workstation, because it has the...

I use VMWare Workstation, because it has the features I know I need (snapshots, Virtual network editing) and I'm familiar with setting it up.

There are two hard parts:

The first is doing a...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 12:54 PM
Replies: 5
Views: 192
Posted By Ken Roach
Thank you for posting that screenshot ! That...

Thank you for posting that screenshot !

That is the simple logic that causes the effect I was describing.
Forum: LIVE PLC Questions And Answers July 12th, 2018, 10:06 AM
Replies: 18
Views: 716
Posted By Ken Roach
As mentioned, the simplest thing to do is to turn...

As mentioned, the simplest thing to do is to turn the keyswitch into RUN mode. That prohibits all edits and downloads, but allows monitoring and uploads and read/write of data.

There have been...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 09:53 AM
Replies: 5
Views: 192
Posted By Ken Roach
Check your logic to see what sets the STOP...

Check your logic to see what sets the STOP command.

It is common for people to program A-B drives so that STOP is asserted whenever the START command is not asserted.

The problem is that the...
Forum: LIVE PLC Questions And Answers July 11th, 2018, 05:02 PM
Replies: 7
Views: 314
Posted By Ken Roach
I had somebody use a spray can of "graffiti...

I had somebody use a spray can of "graffiti remover" on a PanelMate years ago; the screen melted and came away like taffy.

Fortunately I had done a great job color-coding the functions, and on...
Forum: LIVE PLC Questions And Answers July 11th, 2018, 01:23 PM
Replies: 18
Views: 2,811
Posted By Ken Roach
On the system that I used the brightness control,...

On the system that I used the brightness control, I considered a Display change to be "activity". I used a Global Connection to write the Display number to the controller, and ran an ordinary PLC...
Forum: LIVE PLC Questions And Answers July 11th, 2018, 11:30 AM
Replies: 7
Views: 314
Posted By Ken Roach
I've used contact film screen protectors for a...

I've used contact film screen protectors for a few years to avoid exactly that sort of damage.

I agree that ordinary plastic polish will work. I like Starbrite Clear Plastic Restorer because I...
Forum: LIVE PLC Questions And Answers July 9th, 2018, 10:12 PM
Replies: 2
Views: 105
Posted By Ken Roach
Welcome to the PLCTalk forum community ! The...

Welcome to the PLCTalk forum community !

The power-up handler does execute just once. LD and ST routines are the most appropriate for execution in that task.

I'm not sure if you could...
Forum: LIVE PLC Questions And Answers July 6th, 2018, 04:36 PM
Replies: 1
Views: 149
Posted By Ken Roach
You cannot substitute communication modules in...

You cannot substitute communication modules in PanelView Standard terminals.

It would be neat if you could, but you can't.
Forum: LIVE PLC Questions And Answers July 6th, 2018, 04:33 PM
Replies: 2
Views: 263
Posted By Ken Roach
Welcome to the PLCTalk forum community ! The...

Welcome to the PLCTalk forum community !

The ControlLogix operating system does not allow you to programmatically modify the destination tag reference.

I'll speculate on a handful of...
Forum: LIVE PLC Questions And Answers July 6th, 2018, 11:23 AM
Replies: 56
Views: 3,977
Posted By Ken Roach
Rooftop solar and home-scale battery storage...

Rooftop solar and home-scale battery storage match up very closely with the power needs of a personal automobile. That's one of the reasons Tesla makes all three.

Also: I take back what I said...
Forum: LIVE PLC Questions And Answers July 5th, 2018, 10:49 PM
Replies: 3
Views: 516
Posted By Ken Roach
Do you have a PanelView Plus Standard terminal,...

Do you have a PanelView Plus Standard terminal, or a PanelView Plus Performance terminal ? What is the exact part number ?

The "Standard" PV+7 supports just one Shortcut, to one controller. ...
Forum: LIVE PLC Questions And Answers July 5th, 2018, 05:04 PM
Replies: 56
Views: 3,977
Posted By Ken Roach
Yeah, that sucks. I've had it happen, generally...

Yeah, that sucks. I've had it happen, generally at grocery stores where the chargers (Blink or ChargePoint) have been vandalized so there's only one available.

One cool feature of the Tesla...
Forum: LIVE PLC Questions And Answers July 5th, 2018, 04:46 PM
Replies: 56
Views: 3,977
Posted By Ken Roach
The time and place to recharge are significant...

The time and place to recharge are significant issues, and worthy of consideration when you buy a vehicle.

When I had short-range EVs (an 80-mile Ford and a 60-mile Smart) I had to plan my daily...
Forum: LIVE PLC Questions And Answers July 5th, 2018, 03:20 PM
Replies: 9
Views: 427
Posted By Ken Roach
It is not. No Rockwell controller suports a...

It is not. No Rockwell controller suports a "Generic I/O Adapter" object.

This kind of functionality was available with Remote I/O protocol on the old PLC-5 Enhanced controllers, by setting up...
Forum: LIVE PLC Questions And Answers July 3rd, 2018, 06:49 PM
Replies: 14
Views: 402
Posted By Ken Roach
Bieber for Timberlake. They're still up by a...

Bieber for Timberlake. They're still up by a Trudeau, thus reversing the Justin trade imbalance.
Forum: LIVE PLC Questions And Answers July 3rd, 2018, 04:05 PM
Replies: 9
Views: 294
Posted By Ken Roach
I prefer to inhibit modules that are in the I/O...

I prefer to inhibit modules that are in the I/O tree but not used by the program, so they don't show up as I/O connection faults on the blinking indicator in Logix 5000, or scrolling across the CPU...
Showing results 1 to 25 of 500

 
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