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Thermal Overload
The threads that wouldn't die...
- 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?
Fortune
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Posts from...
Saturday, November 17, 2007
Polling with large SCADA with 33 PLCs/DCSs
New Replies:
By adel on 17 November, 2007 - 10:18 pm -
By adel on 17 November, 2007 - 10:18 pm -
sorry our WAN is bases on E1 channels that are in multiples of 64K . more than on channel can be...
The question is the right choice for level switch proper for sludge and slurry.
New Replies:
By Roy on 17 November, 2007 - 10:18 pm -
By Roy on 17 November, 2007 - 10:18 pm -
Hamid,
I worked in mining for many years. Ultrasonic meters work well on agitated tanks provided...
Siemens PCS7: Does it have the features to be called as a true DCS or is it a good PLC???
New Replies:
By Tom Tran on 17 November, 2007 - 10:17 pm -
By Tom Tran on 17 November, 2007 - 10:17 pm -
So far I have seen several excellent criteria for a good DCS system.
But we should consider:
...
By Mikho S on 17 November, 2007 - 12:52 am - Hi,
Any good DCS allows new control, I/O configuration and HMI to be developed, tested and...
Variations in P2 intervalve pressure
New Replies:
By gt__maint on 17 November, 2007 - 10:15 pm -
By gt__maint on 17 November, 2007 - 10:15 pm -
when we opened the front plate below the srv & gcv compartments in the running turbine, we saw...
Does anyone know if there is any device or product to interface SLC 500 5/03 to a MODBUS/RTU network of other brands and devices?
New Replies:
By Eddie Willers on 17 November, 2007 - 10:13 pm -
By Eddie Willers on 17 November, 2007 - 10:13 pm -
The most common and straightforward way to interface A-B controllers and Modbus network devices is...
By David on 17 November, 2007 - 10:13 pm - Prosoft is an Allen Bradley 'partner', specializing in communications modules.
...
By Roy on 17 November, 2007 - 10:12 pm - Alejandro,
Check out the "Prosoft" module, these slot into AB racks and have AB...
By Tom Tran on 17 November, 2007 - 10:12 pm - Alejandro,
You can have a Prosoft 3150 MCM module installed in the SLC rack. It is a...
By Pablo H. Halperin on 17 November, 2007 - 10:11 pm - Alejandro:
Try Prosoft.
You can find what you need at
...
How to communicate UPS with PC through Fieldserver
New Replies:
By dchartier on 17 November, 2007 - 10:09 pm -
By dchartier on 17 November, 2007 - 10:09 pm -
Hello shyam;
So basically you have a Modbus RS-485 network established, but you recieve no valid...
By Shyam on 17 November, 2007 - 1:04 am - Dear Sir,
Thanks for your reply. We are using Fieldserver FS-X40. We have installed 90-net...
How to slow down a motor quicker by wiring resistors across armature windings?
New Replies:
By Phil Corso, PE on 17 November, 2007 - 10:08 pm -
By Phil Corso, PE on 17 November, 2007 - 10:08 pm -
Responding to Cyam's 17-Nov (01:45)... I suggest the following procedure, but only if the...
By Roy on 17 November, 2007 - 10:07 pm - Cyam,
Shorting the windings with resistors should work well as your motor will try to act as an...
PLC scan time and TUV certification
New Replies:
By aliaswn on 17 November, 2007 - 10:07 pm -
By aliaswn on 17 November, 2007 - 10:07 pm -
Yes TUV requirement is 300ms for process and 500ms for fire and gas.
I dont think you will need...
Hydraulic Vs. Pneumatic valves
New Replies:
By Roy on 17 November, 2007 - 10:06 pm -
By Roy on 17 November, 2007 - 10:06 pm -
Hi instruguy,
In 40 years I have rarely seen hydraulic actuators used unless it's a water control...
from the Automation List department...
ISO control system for servos/analog sensors/analog outputs and communicationsNeed help searching for control system for Sr Design Project
New Replies:
By Roy on 17 November, 2007 - 10:05 pm -
By Roy on 17 November, 2007 - 10:05 pm -
Mike,
You might also check out Opto22.com
They have a modular PLC system that uses ethernet.
The...
By LeGa on 17 November, 2007 - 1:52 am - Look at new digital Elmo servo amp (http://www.elmomc.com) - I hope you'll find what you need....
How to calculate cable size, switchgears and fuses for feeders and equipment?
New Replies:
By Abhishek on 17 November, 2007 - 10:04 pm -
By Abhishek on 17 November, 2007 - 10:04 pm -
the calculation explained above is right basically
but actually transformer sizing also depends...
I need a mitsubishi plc tutorial to convert my project from omron plc program to mitsubiahi plc program
convert the cpu of s7 300 plc with s7 400?
Selection of thermal relief valves
New Replies:
By Roy on 17 November, 2007 - 9:45 pm -
By Roy on 17 November, 2007 - 9:45 pm -
Hi,
We use thermal relief valves on heat exchangers in case they are blocked in and the...
By S. Curyk P.E. on 17 November, 2007 - 1:23 am - A thermal relief valve is used when a liquid is blocked (i.e. a line or pipe between two block...
Is multi dropping possible on modbus? if yes how?
need a tutorial for Bailey infi-90 dcs...
New Replies:
By Bob on 17 November, 2007 - 1:56 am -
By Bob on 17 November, 2007 - 1:56 am -
I have the solution for you. A company has redesigned the faceplate. Write me at...
We are going to control the position and speed of a stepper motor using em 253 positioning module with Siemens S7 200 PLC (CPU 222, version - 02.01).
New Replies:
By LeGa on 17 November, 2007 - 1:50 am -
By LeGa on 17 November, 2007 - 1:50 am -
Because stepper is open loop position control? That you have cheaper solution with HSOutputs for...
I need to multiply an analogue value, from a sensor, by another value. The result will drive a digital display. I am looking for a standard product, not a PLC.
New Replies:
By Carl Burgess on 17 November, 2007 - 1:39 am -
By Carl Burgess on 17 November, 2007 - 1:39 am -
Check out the Medacs stuff from Status Instruments
http://www.status.co.uk
Regards,
Carl
...
I want to know the general procedure for Thermal Mass Flow Meters Installation.
New Replies:
By ELLI HUTCHINSON on 17 November, 2007 - 1:39 am -
By ELLI HUTCHINSON on 17 November, 2007 - 1:39 am -
You may go to our website:
http://www.thermalinstrument.com...
Preventive maintenance schedule for I&C
Description of the static frequency converter in gas turbines
How to connect normally close and normally open contacts as two different digital inputs?
Mark V start up gets to 95% speed and stays there!
New Replies:
By RTK on 17 November, 2007 - 1:10 am -
By RTK on 17 November, 2007 - 1:10 am -
Hello,
Is the aux lube oil pump and/or the aux hydraulic pump still running?
On occassion we...
What does CPD/FSR refdif mean?
planning to install a firewall between the PI and OPC server to protect the control network. How does that affect the data flow between the PI and OPC server?
New Replies:
By Saber on 17 November, 2007 - 1:06 am -
By Saber on 17 November, 2007 - 1:06 am -
Hello Salem,
Do you still need help on this subject? If yes drop me an email. For your...
Signal names and their significance
Which software I can use to program the S7-200 PLC?
The best method to calculate overall accuracy for natural gas metering system
All the Vendors claim their offering is a true DCS and 'can perform the assigned role'...
New Replies:
By Mikho on 17 November, 2007 - 12:56 am -
By Mikho on 17 November, 2007 - 12:56 am -
My industry colleagues tell me that some controllers cannot be updated with fresh (i.e. additional)...
when we start the compressor, message is "Wrong Phase Seq"...
New Replies:
By anoonmous on 17 November, 2007 - 12:56 am -
By anoonmous on 17 November, 2007 - 12:56 am -
The problem in your compressor is of the main 3 phase supply. You have to make a few attempts by...
Cannot use an eds file, data object missing error
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