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- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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How to connect Wonderware to other SCADA system via OPC
New Replies:
By Wassim Daoud on 29 October, 2009 - 1:22 pm -
I see ... considering that it's a proprietary SCADA, I am hesitant on giving you any advise in...
We have a system working similar to what you describe, but the "central" level as you put...
It is a property SCADA system can support UNIX, LINUX and Windows....
Both local and central can control the field equipment. Of course, between them a mechanism should...
By Wassim Daoud on 28 October, 2009 - 12:45 pm -
What kind of Scada System are you planning on using on the Linux OS?
Wassim Daoud
Global...
Are you planning on using your central system for data collection and control or just data...
By Andrey Romanenko on 28 October, 2009 - 7:29 am -
First of all, it is good to hear Linux is advancing on the plant floor.
Although you may...
Any of you know how to minimize delay time in MODBUS RTU over RS-485 2-wire
New Replies:
By asaria on 28 October, 2009 - 11:48 am -
I had checked it. From panel, I tried to read data from slave using Modbus simulator, i got only 2s...
By Harvard on 26 October, 2009 - 4:44 pm -
RS485 (2 wire) is a half duplex communications path. Just like a 2 way radio one must KeyUp the...
By asaria on 26 October, 2009 - 10:24 am -
What do you mean by KeyUp and KeyDown timing?...
I'd check to see if the slave has a "response delay", or similar setting.
Also, since...
It is possible to get reply from logo in seconds if you can change/access modbus communication...
By Harvard on 25 October, 2009 - 11:32 pm -
Seems you probably have a KeyUp/KeyDown timing issue. The most common problem is the slave responds...
How do I communicate between Foxboro DCs and GSM Protocol?
Modbus RTU master for versamax PLC
Communication between s7200 and churchill radio's
Can anybody told me how to tune Baldor Linear motor .
New Replies:
OK, but I need more details of your application:
- Microflex operation mode (i.e. current or...
By Edwin on 27 October, 2009 - 12:40 am -
Linear encoder: -ATEK MLS1 series linear encoder with hall sensor.
Presently I am able to...
What type of linear encoder with Hall sensor do you have? Can Microflex drive perform brushless...
Using an old DOS program that relies on serial ports on a new PC without one.
New Replies:
By Kevin on 26 October, 2009 - 6:31 pm -
Today I have successfully used a part sold by another PLC manufacturer - HE-CPKB - Sold by...
PIC and PC communication via USB
New Replies:
By nav on 26 October, 2009 - 9:35 am -
thanks bro.... i will try
...
You will need to program both the PC and the PIC to talk via USB.
On the PIC end, Microchip...
time synchronization in DCS system
New Replies:
By M.Bhaskar on 25 October, 2009 - 11:51 pm -
Hi All,
DCS system receive time synchronization in form of Pulse which can be defined for second...
The system clock for most systems nowadays are very unlikely to drift more than a seconds in a day....
I want to read and write data from rs-232 in visual c++
method of connecting a DCS system to GE Mk6 using Modbus serial...
New Replies:
By Rshivabalan on 25 October, 2009 - 6:38 am -
The one of the ways to connect the MKVI HMI with the Foxboro DCS is by the GEGSM protocol. We are...
Need procedure for replacing a TAC Xenta 302 controller on a TAC Vista/LonWorks Network
Question about connection between two control units
New Replies:
Roy, that was my question, too.
Regarding the protocol used by the DCS, 'Ethernet' just isn't...
By Roy Matson on 23 October, 2009 - 12:55 pm -
Pham,
You do have a problem. In my experience most DCS systems have a Modbus communication...
By Wassim Daoud on 23 October, 2009 - 11:37 am -
This is a common challenge in automation world. The more often chosen solution recommended for it...
Connect an Modbus Slave Simulator to Scada
New Replies:
By Tallak Tveide on 22 October, 2009 - 1:13 am -
Ruby with Modbus
you'll find similar systems on Python, all free and open source
i am...
Nishith,
Simply Modbus offers a Modbus Slave Simulator.
Here is a link to their website:
...
By Lorne on 21 October, 2009 - 10:20 am -
Calta produces a Modbus simulator package. A demo is available at www.calta.com....
By Mark on 21 October, 2009 - 8:42 am -
Hello,
Check out the free slave simulators at: http://www.peakhmi.com/
Good luck,
Mark...
I would like to discover all Ethernet/IP enabled devices from the current network.
New Replies:
> If anyone has any other ideas, I would very much like to hear them. <
ODVA oversees...
Improving the communication data speed between OPC server to Application software.
New Replies:
By Fred Loveless on 21 October, 2009 - 9:53 am -
Are you using RSLinx or another manufacturers OPC Server. It makes a difference in recommending how...
Anybody who has succeeded in using af S7 USB adapter in VMware (windowsXP) on linux?
how to multiplex RS485 slaves over single RS232 channel
New Replies:
By Darrin Hansen on 20 October, 2009 - 9:06 am -
Hi Sven.
There are of course many gateways out there that could accomplish your task. Our...
>What exactly are you trying to do..
Hi Vance. Trying to do exactly what the two suggested...
Hi Patrick,
Thanks for the reply. Your product too does what we needed, but as I just said in...
Hi Jerry. Your product does exactly what we needed, but we've now decided to make connection via...
NTP/Modbus interface for time-stamping
New Replies:
There is no practical limit to the number or protocols that can be sent via a single Ethernet port....
By gc05 on 19 October, 2009 - 5:06 am -
The main protocol for the Scada system is modbus and the clock sync is NTP. However, we are trying...
Water/Gas Meter with Modbus/LonTalk/BACnet Compatibility
New Replies:
Hello Steve,
For your application, I recommend using a Sensus (or Sensus-compatible) water meter...
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