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A computer virus caused serious problems recently for an Australian electric utility.
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By Matt Warshawsky on 14 October, 2009 - 12:35 pm -
I guess I should add:
A firewall is actually just a piece of software running on an embedded...
By Matt Warshawsky on 14 October, 2009 - 12:14 pm -
In response to the various posts:
A firewall with no open ports (i.e. doesn't let any traffic...
By DaveMH on 14 October, 2009 - 8:21 am -
Michael
I don't think it is entirely fair to say that all vendors wash their hands and say it is...
By M Griffin on 13 October, 2009 - 9:35 pm -
In response to various posts: I was aware of the Sydney Morning Herald report, but that was one of...
By M Griffin on 13 October, 2009 - 8:45 pm -
In reply to Dilip: Standard routers and firewalls can help somewhat with older types of worms, or...
Hello Michael,
Thank you for posting this as I am trying to keep some kind of log on incidents...
And here
...
We are also a 24x7 manufacturing unit having three standalone SCADA running on Windows platform. I...
By Andrey Romanenko on 13 October, 2009 - 8:30 am -
Hello,
I agree with Michael's ideas on the replacement of the bridge with a more robust OS and...
By M Griffin on 13 October, 2009 - 3:06 am -
In reply to RK Sastry: I can imagine a number of ways to improve your system. However the fact that...
I am also interested in knowing the details about this case. In our installation, the SCADA/PLC...
RTU / TCP mapping
Want to connect a PLC to a existing Ethernet network..
Ethernet & TCP/IP
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By Riyazuddin on 13 October, 2009 - 3:08 am -
Ethernet Address (or MAC) is number that represent Network card & TCP/IP number is number...
need to link two modbus master devices
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By Darrin Hansen on 12 October, 2009 - 10:18 am -
ICC also sells such a gateway, which has multiple ports (2X RS-485 and 1X RS-232) that can...
By Patrick Lansdorf on 12 October, 2009 - 5:00 am -
Hi dexdyne,
HMS has a gateway that will fit your application, connecting two Modbus RTU...
Need Assistance Integrating a WDPF QLC Card to an Allen Bradley 1770KF2 module
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By Joel Tedder on 12 October, 2009 - 10:09 am -
Hello, have you reviewed the information in Westinghouse Manual U0-1130? ...
Need a PLC that runs on 12 volts and supports IEC 1131-3 Structured Text.
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Beckhoff has a large range of controllers that use their Twincat IEC 6-1131 software, allow you to...
Does TwinCAT have Function Blocks for TCP/IP?
How to put to master in the same Modbus bus RS485
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We manufacture a Gateway that allows two Masters over the same Modbus Slave devices. It is our DX...
By L.M. on 5 October, 2009 - 9:09 am -
It is possible to use master multiplexer.
For example:...
By dixinke on 5 October, 2009 - 12:34 am -
In the modbus network, there should no more than one master running at the same time....
By Lorne on 28 September, 2009 - 10:03 am -
Check out the PLC09 Arbitrator (www.calta.com). It was developed for exactly this application.
...
By Patrick L on 28 September, 2009 - 2:58 am -
Hi There,
HMS makes a gateway that is Modbus RTU slave to Modbus RTU slave. Connect one master...
By criders on 25 September, 2009 - 6:20 pm -
Hi,
I think that you would have to find a way to sync the two masters somehow. When one of the...
Remote of Speedtronic Mark V
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OPC is your best bet.
Talk to the various OPC makers to see if any of them will run on WinNT...
If i send the command(010300210001, crc, crc) using serial port in VB.NET. I don't get any response.
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The tutorial actually is great and should answer all you questions but just to add...
Point 2.) ...
> 1.) You have got to set up the port - Port Number, Baud rate, start/stop bits, data bit,...
Unfortunately you are a long way off the mark.
1.) You have got to set up the port - Port...
I am a newbie also, maybe you are closing the port before info or string is read. vb has examples...
Connectivity of HMI & AC 800F with multiple nodes in the network using Profibus cable.
S7 313C-2DP set as a DP Slave but a Master also appears on the network at same node
I would like to see some sample code. where a micrologic 1100 is being used as a Modbus master.
Does anyone know of multiple vendors of USB modbus plus devices?
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By Robert on 26 September, 2009 - 5:27 pm -
I work with with this adapter. Work fine but if you connect them to a different port it will get...
It sounds like you have had some personal bad experience with this. Can you expand on what...
By JoeS on 25 September, 2009 - 2:39 pm -
USB is not suitable for SCADA communications. There is a reason why there is so little support for...
This module works fine. Only issue is to use the same USB port all the time. The driver only...
Using a usb-arcnet coax to connect a notebook with TCI to a mark V
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Hello Everybody,
I'm very sorry for my late reply. What I can tell you guys so far is, that I've...
By agi on 25 September, 2009 - 10:44 am -
Sir,
May I have the information too ??
( to connect to mark-V(LM) via a
...
Communicating my Allen Bradley PLC with DF1 configured processor.
For DF1 full duplex is it 9300-USBS? or any other converters are available
For DF1 full duplex is it 9300-USBS? or any other converters are available
Problem connecting to Factorytalk historian server.
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Make sure you have the server name exact, and that the users names and computers to use the system...
How the protocol is implemented in a PLC?
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By andrzej on 24 September, 2009 - 2:30 pm -
Hello,
Try the websites :
www.modbus.org
www.modbus.pl
Regards
Andrzej...
Clone to new OS with new hardware or Clone to new hardware with same OS?
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