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Clarification regarding Microprocessor based relay, data concentrator and I/O Count or hard wire signals
Network Redundancy
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By Fred Loveless on 29 December, 2009 - 11:49 am -
ideally in a situation like that you would have dual ethernet cards for the IO. However when you...
Communications breakdown between DCS and PLC using Modbus communication between PLC and DCS.
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By Rudi on 29 December, 2009 - 4:42 am -
I think the only solution that helps with failing hardware is to create redundancy. With modbus you...
By Harvard on 24 December, 2009 - 11:15 am -
See www.national.com/an/AN/AN-1057.pdf which is titled "10 Ways to Bullet Proof your...
pl7/07 program not available. solutions?
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By Pal Tuska on 28 December, 2009 - 10:44 am -
Dear Costas!
I have the PL07 program. My firm is system integrator mainly with Schneider...
What is the range of Pellistor input?
DC motor controller for a 8kW powered 24-48 V DC motor
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What's kind of your motor (i.e. PMBL or others)? Is 8kW cont. or peak power?...
difference in the addressing scheme in alias addresses of PLC and Modbus addressing.
IS it possible to simulate the analog signal in rs emulator?
How calculate PIDE output?
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By Hamad on 24 December, 2009 - 6:02 am -
HI fellows,
Plz help me in that question.
thanks
...
Is Modbus/TCP RTU really running at 10M/100Mbps?
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By M Griffin on 23 December, 2009 - 6:37 pm -
Modbus/TCP will be sent at whatever speed your Ethernet connection is. That could be 10Mb (10...
By Tallak tveide on 23 December, 2009 - 4:46 pm -
Most implementations i have seen will let you select any baud rate for serial modbus. Disregarding...
By Nik Kinze on 23 December, 2009 - 4:24 pm -
I am reading your question and trying to decide what you are really asking.
Maybe this will...
By Andrzej on 23 December, 2009 - 3:16 pm -
Hello,
The speed of Modbus transmission is as fast as the slowest element in the chain. You can...
I'm looking to find out if my communication problem is a common one, and if anyone has a solution to it.
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The momentums have been known to be a bit picky with communications. Especially when noise is on...
The Siemens S7-1200 PLC
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By Steve Myres on 23 December, 2009 - 2:14 pm -
These look pretty cool from what little information I've seen. Looking forward to getting my hands...
By guppy on 23 December, 2009 - 9:48 am -
There will be no STL, just SCL S7-200 will be supported till 2012.
...
PLC to do remote switch on and off; replacing a physical switch
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By M Griffin on 23 December, 2009 - 11:56 am -
Use a relay to interface the PLC to the power supply. That will isolate the PLC from the PS, and...
By Hamad on 23 December, 2009 - 8:38 am -
Hi,
i read your message it generate lot of questions. what type of plc are you used?
what...
By Ken E on 23 December, 2009 - 8:29 am -
You need to research your PLC output type. Usually the digital IO is either a opto coupler...
Triconex ESD DO cards - DO output card is showing alarms
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Hi,
You can check the following.
1) Go to Tricon Diagnostic window and check any alarm...
Square root extraction in DCS
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By Almontser on 22 December, 2009 - 3:18 pm -
normally the default configuration for the flow transmitters is non-linear output, and you have to...
If the transmitter output is already a square root of the differential pressure, then the DCS...
By Roy Matson on 22 December, 2009 - 11:07 am -
"why should I have a square root extraction calculation (sqrt (input/100) * (Span high-Span...
I don't have the instruments specifications. I only have the P & ID's for analysis. But...
there are some smart transmitters which can be configured to give square root output. put any way...
You will have to determine if the output of the flow transmitter is actually flow or differential...
How can I simply convert from Ethernet to Modbus Plus
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Make sure that you clarify what you want to do. There are some gateways (bridges) on the market...
No communication with the PLC
Absolute compressor and gas turbine control systems.
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By Thomas on 21 December, 2009 - 11:47 am -
Another independent gas turbine control system specialist company with a few hundred installations...
can you please help me for this matter...i want to have a motor controller which is suitable to be interface with the plc seimens s7-200.
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The simpler way is using Analog Output 0-10V for speed regulation (instead of PWM one) and Digital...
Solution for display and alarm technology to monitor temperature.
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thanks kt,
WE do not require analog output. We need only contact type alarm output. Actually we...
Hi Sanjib,
I am not sure i understand your request. Do you mean how do you configure the...
Capabilities of the Automation direct LCD?
I specialize in SCADA programming and have a good knowledge of PCS 7, BUT HELP!!! I'm Lost I started a new project on S7 and have no clue as to where to start!
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By Jan Steen Nielsen, Denmark on 19 December, 2009 - 2:00 pm -
Hello dear "Dummy"
Please mail to me and I will give you the best help anybody can...
First time working with Moscad. Need to obtain software to configure then communicate with a modicon m340 PLC via Modbus.
A question that has been on my mind for some time...
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By ALF on 18 December, 2009 - 5:14 pm -
Your are right!. If you try to design and built your own plc with some 516 I/O digital points plus...
How this rung work?
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By MMAhsan on 18 December, 2009 - 5:04 pm -
Hi Ali,
You can study the Mark-5 manuals given to you from GE. It's described in the manual that...
Error nag at top of panelview when exiting with out saving changes
To connect the CompactLogix to Modbus, when should I use the Prosoft card (MVI69-MCM) and when shall I use the Allen Bradley card (1769-SM2)?
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By James Ingraham on 18 December, 2009 - 10:48 am -
Last but not least, you may not even need the Modbus card. There is a downloadable application...
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