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Search: Posts Made By: Ken Roach
Forum: LIVE PLC Questions And Answers Yesterday, 08:40 PM
Replies: 2
Views: 63
Posted By Ken Roach
Why are you asking ? The Kinetix 300 inputs...

Why are you asking ?

The Kinetix 300 inputs are both for ordinary functions like Overtravel and for fast functions like Registration Input. A quick look at the discrete input section of the User...
Forum: LIVE PLC Questions And Answers Yesterday, 03:05 PM
Replies: 8
Views: 107
Posted By Ken Roach
What you're looking for when you are sniffing out...

What you're looking for when you are sniffing out the IP address of an embedded device like the 1734-AENT are "Address Resolution Protocol" packets.

You'll see them despite having your NIC set for...
Forum: LIVE PLC Questions And Answers September 23rd, 2018, 03:01 PM
Replies: 5
Views: 107
Posted By Ken Roach
In theory, RSView32 7.40 is compatible with...

In theory, RSView32 7.40 is compatible with Windows XP SP2.

But if you have a failed computer that is over ten years old, I would strongly recommend migrating your application to a modern...
Forum: LIVE PLC Questions And Answers September 23rd, 2018, 02:32 PM
Replies: 5
Views: 107
Posted By Ken Roach
What edition and service pack of Windows XP are...

What edition and service pack of Windows XP are you using ? Example: Windows XP Service Pack 3.

Are you installing this on an old computer with Windows XP-compatible hardware, or a Virtual...
Forum: LIVE PLC Questions And Answers September 23rd, 2018, 01:59 PM
Replies: 9
Views: 9,402
Posted By Ken Roach
Please create a new thread with a clear question....

Please create a new thread with a clear question. Re-opening a thread from 2004 is inappropriate because fourteen years is a very long time for computer operating system evolution.
Forum: LIVE PLC Questions And Answers September 22nd, 2018, 08:03 PM
Replies: 6
Views: 380
Posted By Ken Roach
While I understand that you're pleased that you...

While I understand that you're pleased that you found a way to get your controller to run without a properly configured network architecture, you have made a very bad engineering decision.

The...
Forum: LIVE PLC Questions And Answers September 21st, 2018, 05:21 PM
Replies: 150
Views: 35,371
Posted By Ken Roach
Literally my first day working for Allen-Bradley...

Literally my first day working for Allen-Bradley doing telephone technical support, I took a call from a guy troubleshooting a 1336 Plus VFD.

A senior support engineer had volunteered to...
Forum: LIVE PLC Questions And Answers September 21st, 2018, 11:38 AM
Replies: 7
Views: 191
Posted By Ken Roach
Are you planning on using a Red Lion...

Are you planning on using a Red Lion Graphite-series HMI anyhow ?

They very recently introduced MQTT protocol support on the Graphite series (C3000 and Edge/Core Controllers) with Crimson 3.1.
...
Forum: LIVE PLC Questions And Answers September 20th, 2018, 03:54 PM
Replies: 11
Views: 315
Posted By Ken Roach
The old PLC/SLC Rockwell controllers have only...

The old PLC/SLC Rockwell controllers have only "Global" data tables; they can be accessed by any routine in the controller.

Most modern controllers allow you to restrict the scope of a Variable...
Forum: LIVE PLC Questions And Answers September 20th, 2018, 01:55 PM
Replies: 10
Views: 320
Posted By Ken Roach
It's possible for the Series letter of the...

It's possible for the Series letter of the SLC-5/04 to make a difference, but in my opinion it's unlikely.

A very early Series A controller (1993 vintage) might have an EEPROM that won't accept a...
Forum: LIVE PLC Questions And Answers September 20th, 2018, 01:23 PM
Replies: 11
Views: 340
Posted By Ken Roach
The MicroLogix RTC clocks only indicate even...

The MicroLogix RTC clocks only indicate even numbers of seconds.

I don't know why they were designed that way, but they were. The clock is working as intended.
Forum: LIVE PLC Questions And Answers September 19th, 2018, 11:57 PM
Replies: 8
Views: 217
Posted By Ken Roach
The strings in a Local Message table can have...

The strings in a Local Message table can have variables embedded in them, just in curly braces.

So you can have a line in the Local Message table that says "Station {Stn_Number} Ready"

But you...
Forum: LIVE PLC Questions And Answers September 19th, 2018, 07:33 PM
Replies: 8
Views: 217
Posted By Ken Roach
What model of PanelView device: PanelView Plus...

What model of PanelView device: PanelView Plus or PanelView 5000 ?

Are you limiting your question to the Local Messages feature (suggesting PV+) or are you implementing this as a String Display ?
Forum: LIVE PLC Questions And Answers September 19th, 2018, 05:19 PM
Replies: 18
Views: 488
Posted By Ken Roach
Wait... wait... you posted earlier about a Safety...

Wait... wait... you posted earlier about a Safety Relay where you were measuring lower voltages than expected.

I believe that's part of the cross-fault detection features of a safety relay, and...
Forum: LIVE PLC Questions And Answers September 19th, 2018, 04:01 PM
Replies: 3
Views: 117
Posted By Ken Roach
I get some grief for it from our younger...

I get some grief for it from our younger programmers, but I often do stuff like this with brute-force ladder logic because I consider it easier to understand. Four bits don't make up that huge a...
Forum: LIVE PLC Questions And Answers September 19th, 2018, 03:40 PM
Replies: 3
Views: 117
Posted By Ken Roach
Four bits to represent the values 0-15 is...

Four bits to represent the values 0-15 is ordinary binary, not Binary Coded Decimal (BCD). You don't need an FRD instruction.

Instead, just use a Masked Move:

Source: I:0
Mask: 000Fh...
Forum: LIVE PLC Questions And Answers September 19th, 2018, 02:51 PM
Replies: 11
Views: 340
Posted By Ken Roach
I'm reasonably confident that this user, who has...

I'm reasonably confident that this user, who has been posting for twelve years, is not posting a school assignment.

But we'll ask questions anyhow:

What model of PLC are you using ?

Does the...
Forum: LIVE PLC Questions And Answers September 18th, 2018, 11:57 PM
Replies: 3
Views: 172
Posted By Ken Roach
This sounds a lot like the "maximum CIP...

This sounds a lot like the "maximum CIP connections" setting for the RSLinx Classic EtherNet/IP driver issue that could cause failed edits in the SLC-5/05 and the MicroLogix 1100.

In the driver...
Forum: LIVE PLC Questions And Answers September 18th, 2018, 08:14 PM
Replies: 6
Views: 247
Posted By Ken Roach
Hoffman makes a series called "Sequestr" that has...

Hoffman makes a series called "Sequestr" that has a side-mounted section for the enclosure and main circuit protection, so that they're in an arc-flash segregated part of the enclosure.

But...
Forum: LIVE PLC Questions And Answers September 18th, 2018, 05:06 PM
Replies: 3
Views: 97
Posted By Ken Roach
I presume you are testing your logic, rather than...

I presume you are testing your logic, rather than using raw sockets to communicate between ControlLogix instead of MSG instructions or Produced/Consumed Tags.



Yes. When you use the...
Forum: LIVE PLC Questions And Answers September 18th, 2018, 12:11 PM
Replies: 6
Views: 179
Posted By Ken Roach
To extract a program from a BASIC module you need...

To extract a program from a BASIC module you need to connect to its serial console port and perform a LIST command to print the program.

It's theoretically possible to exchange data with the BASIC...
Forum: LIVE PLC Questions And Answers September 17th, 2018, 07:58 PM
Replies: 4
Views: 234
Posted By Ken Roach
An ordinary analog card is built for a different...

An ordinary analog card is built for a different voltage or signal range, with A/D converters of different precision and range, and different protective circuitry.

The 1734-IT2I has a sensitivity...
Forum: LIVE PLC Questions And Answers September 17th, 2018, 07:16 PM
Replies: 2
Views: 127
Posted By Ken Roach
The only "normal" number of FCS and alignment...

The only "normal" number of FCS and alignment errors is zero. What you're seeing is plenty to kill an I/O connection... but maybe once or twice.

I would focus on the v21 firmware compatibility...
Forum: LIVE PLC Questions And Answers September 17th, 2018, 05:59 PM
Replies: 6
Views: 179
Posted By Ken Roach
You're correct that the Input and Output address...

You're correct that the Input and Output address space in the SLC-500 is fairly small; the backplane can handle a maximum of 32 discrete input Words and 32 discrete output words per module.
...
Forum: LIVE PLC Questions And Answers September 17th, 2018, 04:02 PM
Replies: 27
Views: 2,380
Posted By Ken Roach
I don't know what age of software you have. As...

I don't know what age of software you have. As far as I know, the 1734-AENT Chassis size has always been settable using RSLinx Classic.

I dusted off a 1734-AENT Series A manufactured in...
Showing results 1 to 25 of 500

 
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