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Search: Posts Made By: Ken Roach
Forum: LIVE PLC Questions And Answers Today, 10:49 PM
Replies: 1
Views: 16
Posted By Ken Roach
Yes, the 1770-KF2 is a suitable way to connect to...

Yes, the 1770-KF2 is a suitable way to connect to the DH+ port on a PLC-5/10. Set them up for separate Node numbers and connect them with a piece of the appropriate Belden "blue hose" cable, with...
Forum: LIVE PLC Questions And Answers Yesterday, 01:06 AM
Replies: 13
Views: 413
Posted By Ken Roach
Frames identified by Wireshark as TCP...

Frames identified by Wireshark as TCP retransmissions are literally the same frame as another recent one, byte-for-byte.

There is no chance that these are re-tries of a message by the...
Forum: LIVE PLC Questions And Answers December 10th, 2018, 08:42 PM
Replies: 13
Views: 413
Posted By Ken Roach
I my guess about a mis-configured port is...

I my guess about a mis-configured port is correct, then putting the MicroLogix 1400 on a different port should change the behavior.

Unless there's a group of ports and this is a VLAN trunk...
Forum: LIVE PLC Questions And Answers December 10th, 2018, 12:44 AM
Replies: 13
Views: 413
Posted By Ken Roach
What that looks like to me is that the MicroLogix...

What that looks like to me is that the MicroLogix port has been set to have its traffic mirrored on the ControlLogix port, and then the ControlLogix port has been set to mirror its traffic to your...
Forum: LIVE PLC Questions And Answers December 8th, 2018, 12:54 AM
Replies: 4
Views: 352
Posted By Ken Roach
That's why you see a third wire in the trunk...

That's why you see a third wire in the trunk cable for SLC-500 Data Highway 485 networks; they use an isolated common conductor instead of ground or shield.

I like that RobustDC document; I've...
Forum: LIVE PLC Questions And Answers December 7th, 2018, 11:43 AM
Replies: 3
Views: 155
Posted By Ken Roach
It's generally recommended to use managed...

It's generally recommended to use managed switches in high-demand industrial networking applications because of the diagnostic features and the management features they provide.

In *some*...
Forum: LIVE PLC Questions And Answers December 7th, 2018, 11:30 AM
Replies: 6
Views: 233
Posted By Ken Roach
Scott (and the general readership) It's easy...

Scott (and the general readership)

It's easy to misunderstand the details of Ethernet-to-serial gateway or bridge devices and what protocols and applications they support.

There are many...
Forum: LIVE PLC Questions And Answers December 7th, 2018, 08:29 AM
Replies: 6
Views: 233
Posted By Ken Roach
I think you're misunderstanding the stuff you're...

I think you're misunderstanding the stuff you're reading. The CompactLogix is not directly "Modbus compatible" and Ethernet is fundamentally different than serial RS-232 or RS-485 signalling.
...
Forum: LIVE PLC Questions And Answers December 6th, 2018, 05:41 PM
Replies: 7
Views: 335
Posted By Ken Roach
There is a specialized search engine actively...

There is a specialized search engine actively scanning worldwide looking for exactly this type of vulnerability; Shodan.io (https://www.shodan.io/)

It's worth the time and money to buy or build a...
Forum: LIVE PLC Questions And Answers December 6th, 2018, 12:36 PM
Replies: 5
Views: 284
Posted By Ken Roach
I presume you're online with the MicroLogix via...

I presume you're online with the MicroLogix via its serial port, then ?

Is there a switch, or do you have them literally connected straight between ?

I'm not 100% certain that the servo and...
Forum: LIVE PLC Questions And Answers December 5th, 2018, 11:02 PM
Replies: 5
Views: 284
Posted By Ken Roach
Welcome to the PLCTalk forum community ! ...

Welcome to the PLCTalk forum community !

Generally a connection timeout really means a connection timeout.

Describe your IP addressing, subnetting, and physical configuration of the networking,...
Forum: LIVE PLC Questions And Answers December 5th, 2018, 11:05 AM
Replies: 7
Views: 389
Posted By Ken Roach
I was a peripheral part of a power plant...

I was a peripheral part of a power plant disaster. Everyone at the plant had a story about how they had just stepped behind a door or column or away from a window when the blast occurred; the fact...
Forum: LIVE PLC Questions And Answers December 2nd, 2018, 12:27 AM
Replies: 10
Views: 294
Posted By Ken Roach
In my opinion you want to look at Inductive...

In my opinion you want to look at Inductive Automation's Ignition product.

Even if their Java-based HMI/SCADA isn't what you need, the engine it runs on top of is based on SQL from its core; ...
Forum: LIVE PLC Questions And Answers December 1st, 2018, 02:19 AM
Replies: 4
Views: 379
Posted By Ken Roach
OK, so those sensors are using the Sigfox...

OK, so those sensors are using the Sigfox low-power wireless network to connect through gateways to an Internet-connected cloud server.

Do you know if your company has installed and controls those...
Forum: LIVE PLC Questions And Answers November 30th, 2018, 01:47 PM
Replies: 1
Views: 150
Posted By Ken Roach
With DC 24V cards, you have a choice between...

With DC 24V cards, you have a choice between 1756-IBxx (sinking) and 1756-IVxx (sourcing), but all AC input modules are effectively "sinking" inputs just because of the nature of alternating-current...
Forum: LIVE PLC Questions And Answers November 30th, 2018, 03:39 AM
Replies: 2
Views: 263
Posted By Ken Roach
Can you post a link to a user manual for the...

Can you post a link to a user manual for the MicroMotion, or its EDS file ?

Unfortunately you have probably identified a situation where you can select a particular "assembly" of data to be part...
Forum: LIVE PLC Questions And Answers November 28th, 2018, 09:06 AM
Replies: 2
Views: 149
Posted By Ken Roach
Welcome to the PLCTalk forum community ! You...

Welcome to the PLCTalk forum community !

You have made a statement of intent, with the implication that you would like general advice about the interface.

Please add any information you have or...
Forum: LIVE PLC Questions And Answers November 27th, 2018, 04:50 PM
Replies: 5
Views: 129
Posted By Ken Roach
Be aware that the PanelView Plus "Compact" and...

Be aware that the PanelView Plus "Compact" and the PanelView Plus 7 "Standard" terminals are limited to just one driver and just one controller data source.

But with the normal PV+ and PV+6, and...
Forum: LIVE PLC Questions And Answers November 27th, 2018, 01:15 AM
Replies: 3
Views: 178
Posted By Ken Roach
It's part of the Axis object, either the...

It's part of the Axis object, either the HomePosition or HomeOffset. You can read it with a GSV or write it with an SSV.
Forum: LIVE PLC Questions And Answers November 24th, 2018, 09:56 PM
Replies: 6
Views: 200
Posted By Ken Roach
Assembly numbers 100 and 101 are the most...

Assembly numbers 100 and 101 are the most commonly used for Input and Output data. Are you certain it's 111, not 101 ?

Check connectivity with PING, and TCPING, with a Web browser, and with...
Forum: LIVE PLC Questions And Answers November 23rd, 2018, 08:29 PM
Replies: 11
Views: 336
Posted By Ken Roach
Welcome to the PLCTalk forum community, BTJ. ...

Welcome to the PLCTalk forum community, BTJ.

It would be preferable to start a new thread for your RFID reader, especially since the solution to the original problem was specific to enabling the...
Forum: LIVE PLC Questions And Answers November 20th, 2018, 08:58 PM
Replies: 5
Views: 177
Posted By Ken Roach
The Samsung external SSDs are fantastic for speed...

The Samsung external SSDs are fantastic for speed and value. I store virtual machines and large project backups on them, and have run the VMs over a USB3.0 port in a pinch.

I'm tempted to just...
Forum: LIVE PLC Questions And Answers November 18th, 2018, 04:43 PM
Replies: 4
Views: 313
Posted By Ken Roach
What sort of loads are you lifting ? Anything...

What sort of loads are you lifting ? Anything safety related or overhead ?

How closely are the drive axes coupled; you refer to them as "conveyors"; is the horizontal axis lifted by the...
Forum: LIVE PLC Questions And Answers November 16th, 2018, 07:16 PM
Replies: 2
Views: 160
Posted By Ken Roach
Welcome to the PLCTalk forum community ! ...

Welcome to the PLCTalk forum community !

First, the technical answer: no, you cannot use a PLC-5 Scanner or a 1747-SN Scanner to run 1756 I/O with a 1756-DHRIO module as an Adapter.

Another...
Forum: LIVE PLC Questions And Answers November 16th, 2018, 05:06 PM
Replies: 7
Views: 312
Posted By Ken Roach
Yup; the first 12 inputs can be used with HSC or...

Yup; the first 12 inputs can be used with HSC or with interrupts for pulse-catching or discrete input interrupt features. You're on the right track !
Showing results 1 to 25 of 500

 
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