Posts from...
Today, Monday, March 15, 2010
Topic: Continuous process industries, DCS questions.
from the I&C department...
Pneumatic Control Valve
Originally posted by Amer 111 on 12 March, 2010 - 2:44 am
Pneumatic Control Valve Calibration
New Replies:
What is the exact problem? What aspect of the positioner are you trying to calibrate? - input...
Amer, Sometimes the control valve positioner is not linear travel wise i.e. 50% signal...
If I was in your position, First thing I would do is located the manual for the control valve you...
I know, but if I need to program the control valve to be full open when it reaches to 60% of the...
You shouldn't need to use a HART communicator. A mA source is what you need. Start the stroke at...
Originally posted by thybanhh on 15 March, 2010 - 1:35 am
What is the different between float and displacer level measurement
New Replies:
A float does just that, it floats on top of a liquid following the surface up and down. A...
http://www.iceweb.com.au/Technical/LevelTechnologies.html...
Topic: PLCs and related questions.
from the application: pilotless dc vehicle department...
Speed Control of a BLDC Motor with a PLC
Originally posted by PSJ on 15 March, 2010 - 4:04 am
Developing a pilotless dc vehicle - which will follow a
magnetic tape on ground.
New Replies:
Using PLC for control BLDC motors isn't good idea due to necessity to commutation of motor and use...
Topic: PLCs and related questions.
from the kariayam department...
Ladder logic simulator
Originally posted by cikenkari on 5 March, 2010 - 9:09 am
Ladder logic simulator software portable
New Replies:
http://www.plcsimulator.net/ Register first and then start programming.. You can even save your...
Originally posted by Phineas Phreak on 9 March, 2010 - 9:04 am
ABB AC800M controllers.
New Replies:
Thank you again. Regards, Phineas....
'they also claim it has to be done on site while connected to the 800xa via an engineering...
John, Thank you for your comprehensive and highly informative answer. Luckily, I have...
"It seems that downloading to a network of AC800's, the download software distributes the...
Topic: Engineering and workplace issues.
from the Forum department...
Pricing of DCS systems
Originally posted by Amit Anand on 11 March, 2010 - 6:23 am
How does a vendor reach the final pricing of a particular service for DCS and for a whole service contract?
New Replies:
Thanks a lot Sudeep. The % of list price may vary from 5% to 30% for support services (if I am...
Topic: Application Questions and Problems
from the Automation List department...
Calculating an average value of the wind direction
Originally posted by Ville on 18 May, 2005 - 7:46 pm
How do I calculate the average value of the wind direction when 0° and 360° are the same?
New Replies:
Hi Ville! Try to trap 360 value and output it as 0 so to make your average correct. Just add...
Sorry, alex001, your C program does not solve the problem. To see that it does not work, just feed...
I've written the following program in C. Can you tell me if it works correctly for your problem? ...
Topic: PLCs and related questions.
from the Automation List department...
Open source PLC hardware
Originally posted by William Sturm on 13 February, 2010 - 10:13 am
Creating homegrown PLC hardware
New Replies:
> According to Atmel's web site, it includes: >...
With regards to compilers: gcc-avr is in the Ubuntu (and therefore I imagine Debian) repositories -...
There are several different Creative Commons licenses. For all of them however, I don't think there...
Hi all Request for comments on releasing the design under a Creative Commons license. ...
What i find really interesting is the low threshold to being in the embedded Linux game. Even...
The AVR board looks like it would do the job for a Modbus/TCP interface, provided it works with the...
Topic: Programming languages.
from the Moving from Ruby to Structured Text department...
Global type declarations, Beckhoff TwinCAT
Originally posted by sulfur8 on 9 December, 2009 - 9:18 pm
How does one declare a global type declaration using TwinCAT?
New Replies:
By Roger Christopher on 14 March, 2010 - 3:17 pm -
Click on the Data Types tab in the left pane of the editor, then define your structures, enums and...
Topic: Power generation equipment control.
from the Forum department...
Flow divider magnetic pickup
Originally posted by mksod on 13 March, 2010 - 6:02 am
Got a malfunction in a magnetic pickup in flow divider
New Replies:
Dear CSA Thank you very much...
You need to jumper a good pick-up to <S>'s input after you disconnect the wires of the bad...
Topic: Software, including programming, OS issues, etc.
from the Forum department...
About operator action log in ABB 800Xa
Originally posted by any on 1 March, 2010 - 7:30 am
About how to put operator log action messages as events.
New Replies:
"I observed that when operator stops an equipment a event log is generated at same time the...
Topic: Application Questions and Problems
from the Instrumentation department...
Pressure Hookup
Posted by arfp on 14 March, 2010 - 10:10 am
Any provision to consider for connection of stainless steel tube of instrument tap to carbon steel block valve?
Topic: Human-Machine Interface and SCADA.
from the automation department...
ASPLA ICS
Posted by eslam on 14 March, 2010 - 9:45 am
Looking for documents and programming information for ASPLA ICS
Topic: Power generation equipment control.
from the forum department...
power deficiency
Originally posted by zulfi on 12 March, 2010 - 11:22 am
generator responds after load shedding
New Replies:
It seems you are asking what happens when a generator and some load (the "island") are...
Topic: Engineering and workplace issues.
from the INSTRUMENTATION department...
C CODE Help
Originally posted by POWERPC440EP on 12 March, 2010 - 1:55 am
C Code for enabling serial port in powerpc440ep
New Replies:
This class for serial communication works on many different operating systems. ...
I assume you are using Linux or something similar. Just type "linux serial port c code"...
Topic: Communications systems and equipment.
from the Maintenance department...
Upgrade the Mark V
Originally posted by DAMENE Amar on 7 February, 2010 - 7:53 am
To upgrade or to substitute the PANEL Mark V
New Replies:
It's presumed since you posted in a Mark V-related thread that you are looking for Mark V...
Hi, My company is looking to purchase OEM parts for GE Nuovo Pignone frame 5 to keep as spare...
Posted by Ricardo R on 13 March, 2010 - 3:07 pm
Problem with TSX Premium MODBUS TCP messaging not solved
Topic: Application Questions and Problems
from the Instrumentation department...
Duplex Thermocouple
Originally posted by MNak on 29 March, 2008 - 11:23 pm
What is duplex thermpcouple wire. Is it related to duplex sensor thermocouple.
New Replies:
Yes, duplex wire is similar to duplex elements. Duplex wire has two pairs of T/C wire for...
Topic: Sensor technologies.
from the Chemical department...
Density Measurment
Originally posted by Engineer on 10 March, 2010 - 8:02 pm
How can I reliably measure sodium hydroxide (50%) density online.
New Replies:
refractive index is used to measure flowing concentration of NaOH. See K-Patents' app note at ...
Funny how things work. I just started up a caustic plant this week that makes down 50% sodium h to...
Thanks All. In our process we are diluting raw caustic from 48% to 23%....
Topic: PLCs and related questions.
from the Automation department...
Two modbus master
Posted by Sylvain on 13 March, 2010 - 8:38 am
Quickpanel vs M340.
Posted by Rodrigo P on 13 March, 2010 - 5:13 am
I cant recover safety mode after a download in Delta mode to Siemens PLC.
Originally posted by CLD on 12 January, 2007 - 1:28 am
I have a digital weighing scale I need to connect to the PC using RS232 communication port.
New Replies:
increase input length to 7-8 it will work...
Topic: Information resources, documentation.
from the automation department...
Simatic s7 example
Originally posted by eslam on 11 January, 2010 - 2:50 am
how to start programing in Simatic s7
New Replies:
Hello Eslam Visit website "Controlwiki.com" Select "PLC Archive" Select...
Topic: Continuous process industries, DCS questions.
from the PID department...
Step7 with PID SIMO
Originally posted by step7 on 18 February, 2010 - 3:21 pm
Siemens Step7 with PID SIMO (single input, multiple outputs)
New Replies:
Hello Mr./Mrs. Noname Send me a mail. I think I can help by sending you a small program for...
Topic: PLCs and related questions.
from the News department...
Siemens S7-1200
Originally posted by Marc Sinclair on 1 April, 2009 - 1:39 pm
The Siemens S7-1200 PLC
New Replies:
I've spent some project time working with one of these. I really like the way that Step 7 Basic...
Topic: Application Questions and Problems
from the Forum department...
voltage drop
Originally posted by electrical on 12 March, 2010 - 10:15 am
i have an 800foot run of #12 rwu wire to be run to feed an 120 100 va transformer. is this adequate wire size
New Replies:
Electric... voltage-drop and conductor-loss are 2.67-V, and 2.22-W. respectively. If you want...
Try the following links for information on calculating voltage drop. ...
800 ft of #12 wire, single phase, will have voltage drop of approximately 2.7 volts/ampere....
Topic: Power generation equipment control.
from the Operations department...
Forced cooling
Originally posted by IBH on 12 March, 2010 - 8:41 am
Can we force cool a single shaft
New Replies:
You need to get procedure and recommendations from GE. This would likely involve operating the unit...
Topic: Application Questions and Problems
from the Forum department...
Controls problem
Posted by James on 12 March, 2010 - 4:55 pm
Need some help with a controls problem...
Topic: Communications systems and equipment.
from the Forum department...
Array of Strucure in MODBUS communication
Originally posted by Yugal on 12 March, 2010 - 6:58 am
transfer the Array of structure through MODBUS TCP
New Replies:
You won't be able to send all of that in one message, as it would take too many registers to fit....
Topic: Computers in manufacturing; also hardware discussion.
from the Automation list department...
question on Foxboro alarms
Posted by Mina Andrawos on 12 March, 2010 - 1:08 pm
Need help in finding a way to read alarm messages from the foxboro dcs using my application

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