from the Right way to do this? department...Pump Running Indication on Control Circuit
How can I properly wire my pump panel to show that when the pump is actually running I get an indicator on my PLC/HMI.
By Bob Peterson on 10 October, 2014 - 5:40 pm -
the normal way this is handled is by opening the power to the contactor coil if the CB trips. this...
from the automation department...Fast Alarms Between PLC and HMI
How can we make an hmi operator panel detect fast alarms?
By Jeremy Pollard on 10 October, 2014 - 12:45 pm -
Use an alarming sbr in the PLC to time expand.... with Rockwell it would be the TT (timer timing...
from the Forum department...PLCs for Beginners
I need to learn how to operate and use PLCs
By PLC Programmer on 10 October, 2014 - 2:49 am -
PLC programming has a lot of Logic involved. I would recommend you to start from there. Start...
By Ed Wilson on 6 October, 2014 - 5:44 pm -
I self-taught with a DirectLogic 05 from AutomationDirect. The components are very inexpensive and...
from the Forum department...Modbus frame size
Can I use the Modbus frame size larger than 256 bytes?
By Mohsen on 9 October, 2014 - 4:38 pm -
What happen if you request more than 125 registers? will Modbus device send out two response...
from the BMS department...Niagara report
How to have an excel report with Niagara?
from the Industrial Automation department...Modbus TCP/IP
Developing Modbus TCP/IP on RX63NB board with DP83620 as PHY layer interface.
from the Forum department...Adding Modbus register values together
How can you add MODBUS registers?
By ICP DAS on 30 September, 2014 - 7:12 pm -
I have a solution in which you will also have a display of the values and the sum. Using our...
from the General Engineering department...DCS vs PLC
Advantages of DCS over PLC for Gas turbine control
By FT on 26 September, 2014 - 2:53 pm -
I am in agreement and as a proponent of Allen Bradley systems, the difference is in the planning....
from the Forum department...Generator Load Sharing Issue
High amps on one generator
By DHAYANANDHAN on 24 September, 2014 - 9:52 pm -
> I have 3 Waukesha LNG generators that run in parallel, the number running depending on load...
from the ESD department...ProSafe-RS, Is It Online Configurable?
Notes when selecting ProSafe-RS as ESD system.
from the Water Treatment department...Chlorine Pacing for Water Treatment Plants
What kind of control strategy is most often used to pace chlorine (Sodium Hypochlorite) at a Water Treatment Facility or Reservoir?
Sorry Bob, correction: Speed = 0-100% Stroke = 0-100% Total residual Chlorine = 0-10mg/L Flow...
Some great replies here. Obviously experienced hands. I would only emphasize a couple of points...
By Bob Peterson on 23 September, 2014 - 9:47 am -
The thing is that you need to decide what your dosage rate per GPH is and work backwards from...
Thank you for this post. It helps me a lot on how to control the pump speed and stroke for sodium...
from the Forum department...Concept 2.6 Compatiblity Issue
Running windows 8.1 64bit OS and have a concept 2.6 compatibility issue.
Concept 2.6 is a Win-16 program. It still runs on new Windows OS's but only the 32-bit versions. ...
Sorry for the bad news: Concept is a 16 bit application and has not/will not be qualified on Win...
from the Mechanical department...Exit Guide vanes of Gas Turbines
Gas turbine exit guide vanes and how to use them
Hi fluid flow Can you please email me some stuff (presentations/pdfs) regarding cooling and...
Hello fluid flow Yes the turbine clearance may have increased. The turbine is operation with 1-2...
By fluidflow on 26 August, 2014 - 11:46 am -
Hello There, Izhar, you did not mentioned about the blade tip clearances. Any increase in it...
from the Forum department...GFD Chokes?
What does GFD Chokes mean? Is it related to gas flow calculations?
from the Forum department...Calculating Motor Specifications To Run a Conveyor
How to calculate specifications for motor to run conveyor system?
from the Forum department...Hot Air Dryer Supply / Exhaust Air Handling
Supply and exhaust air handling control method evaluation.
By Curt Wuollet on 28 August, 2014 - 7:27 pm -
IIRC, the quantity that was changing was the exhaust velocity. You already have your supply plenums...
Thanks for your response Curt. Do you mean that you would control the differential pressure...
thanks for your response Curt, Do you mean that rather than running my Supply Blowers at fixed...
By Curt Wuollet on 26 August, 2014 - 11:02 pm -
That differential pressure is the one I would control. Regards cww...
from the Education department...Java PID example
I am searching a PID controller example in Java with source code.
By James Ingraham on 28 August, 2014 - 12:11 pm -
Google turned up a few things. This one looks interesting: ...
from the Automation List department...Control Valve Cycle Measurement
How to measure the control valve cycles?
By Sam on 28 August, 2014 - 4:38 am -
I think you are making things more complicated than it needs to be. I have never heard about...
By Gerald Beaudoin on 27 August, 2014 - 1:43 pm -
Sure would appreciate any points of view on this one..... Cheers Gerald Beaudoin...
from the Forum department...Siemens Procidia upgrade
update info? Upgrading from Siemens 3.1 to latest version.
By anonymous on 27 August, 2014 - 2:52 pm -
> Can anyone give me a ballpark cost on upgrading from siemens 3.1 to the latest version? ...
from the Electrical department...Defeated Circuit Breaker
Is it possible to defeat a circuit breaker?
By Curt Wuollet on 26 August, 2014 - 10:34 pm -
Just about everything I've seen for decades is "trip free", but it does make one wonder,...
By Bob Peterson on 26 August, 2014 - 6:20 pm -
This is common place. The CB is typically trip free so it will trip regardless of whether the...
What kind of circuit breakers are they? In my experience most circuit breakers will have a...
from the I&C department...Fuse Monitor Alarm infi-90 DCS
Fuse monitor slave alarm of IMDSI02-NTDI01 DCS Infi90
By john on 26 August, 2014 - 1:59 pm -
Dear Mr. John Thanks for your help. Problem occurs at only one TU-Slave card where 11 modules...
By John on 25 August, 2014 - 8:32 pm -
Rather than chase the fuse details, let's go back and very clearly describe the problem. Can you...
Dear Mr. John Thank you very much for your sharing In our case all contacts are system...
from the Forum department...TCP/IP over Ethernet
Is TCP/IP on ethernet better?
Basically my application is to host a webserver on a microcontroller to host the data of VFD to a...
By Ken E on 26 August, 2014 - 8:56 am -
This is a very open ended question. As with most things it depends on what you are trying to do....
from the Instrumentation department...Installation of Ex-ia Converters in Ex-ia Junction Box
Installing Ex-ia converters in Ex-ia Junction Box instead of EX-d
from the electric department...Adding Two 4 -20 ma Signals to Equal One Output Signal
Adding two 4-20 ma signals to equal one 4-20 ma output signal without a PLC
By Curt Wuollet on 25 August, 2014 - 8:16 pm -
Actually, on reflection there is a cheap simple way if the input you are driving is the typical 250...
By Curt Wuollet on 25 August, 2014 - 8:00 pm -
The word add is misused here and if I get what you want to do, you will need some sort of...
By W.L. Mostia on 25 August, 2014 - 11:40 am -
There are a number of manufacturers that make calculation modules that can add two 4-20 mA signals...
By Carl Burgess on 25 August, 2014 - 10:00 am -
Check out: http://www.status.co.uk/files/Products/121.pdf - This has an 'adder' circuit using...
Laetrile is the pits