from the Forum department...Siemens S5 to ControlLogix Conversion
Translating a Siemens S5 in Statement to Allen-Bradly ControlLogx LAD.
from the twido suite department...PLC timed sequence
is it possible to stop all TON TOFF timers?
from the Master Thesis world department...Master Thesis Guidance With Protocols
Trying to decide which communication protocol is better for the API I am designing for my Master Thesis.
By JOhn Bryan on 30 September, 2014 - 10:31 am -
The security/cost of MODBUS is exceptionally inviting for most applications. It is a...
By Lynn August Linse on 29 September, 2014 - 10:29 am -
You could also look through the California Smart Grid initiatives, as they are trying to define...
Thank you all for your responses. I am strongly considering Modbus, because DNP3 seems to be...
By John Correa on 26 September, 2014 - 7:23 pm -
Hi. You must pay attention in the security (cryptography) issues. A large scale data network...
By Harvard on 26 September, 2014 - 12:28 pm -
I can only speak for the last 35 years (20 with the Fisher ROC series) and it has been Modbus all...
By Lynn August Linse on 26 September, 2014 - 10:10 am -
Wow, that's a tall order. Which is better? :-) Really it depends on your market. Modbus is great...
from the Forum department...Open Source PLC Programming Software
I wanted to know what are the best open source PLC Programming software to use
By visitor on 30 September, 2014 - 12:56 am -
> I wanted to know what are the best open source PLC Programming software to use? > I am a...
from the Engineer department...Why Consider Third Party Companies When Retrofitting/Supporting Your Gas Turbine Controls
Why do people who believe that the OEM is the best alternative for off-warranty service & retrofit contracts why?
Simon, Great philosophical question, and I'm going to try to answer each of your points. >...
from the Engineering department...Connectivity and Controller Tags for VB.NET 2012 OPC RSLinx
Setting up connectivity for VB.NET 2012 OPC. How do I list the TAGs in my controller?
from the Engineering design department...RS485 Connnection to DV-6 VE4006P2
Connecting DCS to VFDs on 485 Modbus RTU
Modbus is not plug-and-play even if Emerson's laughable marketing spiel, "Plug your Serial...
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...Contactless Card Reader and PLC
How to connect contactless card reader to PLC?
from the Automation List department...Why 4-20 ma is used in Analog Signals?
Why 4-20 ma is used in Analog Signals?
By Roy Matson on 26 September, 2014 - 2:18 am -
The point will be argued until 4 - 20 mA is dead and buried. Did anyone mention it was just a...
from the Instrumentation department...Thermocouple Temperature Drops Suddenly
Unexplained temperature drop while process is running
if grounded t/c's are being used, ground loops between the thermowell locations and its ground path...
By cmshelton on 25 September, 2014 - 7:24 am -
If your getting any kind of moisture or water that can cause wrong readings also....
I agree with the suggestion of a short between the + and - wires somewhere. It could even be a...
If you get a high mV reading across the thermocouple wires, then - moving the wires to make the...
By Litto on 24 September, 2014 - 1:21 am -
but if its the problem with cable or element, would i get milli volt corresponding to 950 or 900 on...
A drop to 100 is indicative of a short creating a false junction. A drop to zero is indicative...
If you are dealing with 950C as opposed to 950F, it could be a problem with the thermowell or the...
Somewhere between the hot junction and the analog input there's a short circuit in the extension...
from the Forum department...Free HMI/Process control software
Introduction of free, platform independent and open source HMI/automation software
Even if late, I'd like to chime in and mention there is also Eclipse SCADA...
from the Forum department...DCS analog input problem
DCS Analog input signals didn't work with ADAM card
By dave on 25 September, 2014 - 5:53 am -
I just want to comment that this is a great thread to follow. I enjoyed reading the dialog very...
Mr. Fawzy, That's a very interesting observation. A common for all channels is what allows...
Hi David, I got one information form yokogawa training material that last number in AI/AO cards...
from the Forum department...Encoder input module in PLC
For a 1700 ppr encoder input, is it necessary to use a High Speed Digital Input module in PLC?
By sensorless on 25 September, 2014 - 3:39 am -
> You have to look at a couple of things. > One is whether you need a quadrature signal or...
By Bob Peterson on 23 September, 2014 - 9:41 am -
You have to look at a couple of things. One is whether you need a quadrature signal or whether a...
from the Just cant figure it out! department...High Speed counter S7-200
I need help in figuring out how to use a HSC as a tachometer with the siemens S7-200. It seems simple enough.
By reza ghoddoosian on 24 September, 2014 - 5:42 am -
hi i am looking for an example about HSC in S7-200 so badly, i need a tangible example. i...
from the Forum department...Synchronizing Two ABB DCS Controllers
One type of status reading of ABB DCS says they are Synchronized, but other says they are 35% in Synchronized.
from the networking department...Information regarding tag in Control logix over Ethernet/IP
Are controller tag details for control logix is available on ethernet/IP? Using 1756-EN2T module in controller chassis for communication.
By Ikhtiander on 21 September, 2014 - 3:44 am -
Psahu, It is depend on what third party devices you would like to connect. Can you be more...
By Bob Peterson on 20 September, 2014 - 9:48 am -
The Ethernet/IP protocal is well defined in the spec for it. Best bet is to either buy the spec and...
from the Forum department...Yokogawa DCS Analog Module AAI143
Difference between analog mA value and their correspondent raw value.
I checked the Tunning parameters and there is an error. Maybe is a good idea to do an offline...
Tunning-Raw Value should be
4 mA ----> 0% 6.16 mA ----> 13.5% 8 mA ...
from the Instrument and Control department...Siemens S5 CPU 922 Run and Stop LED Do Not Turn ON
Run and Stop LED on front of Siemens S5 922 CPU doesn't turn ON on powering of rack. Only BASP LED on front of CPU is turned ON.
By Bob Peterson on 17 September, 2014 - 5:26 pm -
We have started getting a fair number of service calls for S5 units. They are closing in on thirty...
By Kevin Frechette on 17 September, 2014 - 1:37 pm -
The only thing I can think of is that the Rack is faulted. The backup battery may be missing or...
from the ModbusTCP department...PROSOFT MVI56-MNET Slave Response Time
PROSOFT MVI56-MNET communication response time and performance
from the PLC comm error department...TSX Premium PLC Problem
Telemecanique TSX Premium PLC unstable operation
By visitor on 17 September, 2014 - 10:28 am -
Thank you very much for your answer. I got contact with local Schneider representatives. They...
By chud on 17 September, 2014 - 4:02 am -
This could be programming......hardware....etc. etc. Without being online with the plc when this...
from the Forum department...RSLinx issue in VMWare WIn 7 32 bit VM
I can do a serial upload and download but I cannot go online with RSLogix 500 inside a VM running WIn 7 32 bit
I just got the 2 port version and it works like a champ. Upload, download and online. Thanks! ...
from the Communication department...Communication Between Control Logix and Centum VP Using Ethernet/IP
Communication not getting established between Yokogawa (ALE-111) and Control logix using Ethernet/IP.
from the seeking product recommendations department...Modbus TCP temperature monitor
I'm looking for a product recommendation
I am looking for much the same thing, a simple temp and humidity for my server room. I just want...
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