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Control.com topic...
Process Control
Topic: Continuous process industries, DCS questions.
from the Forum department...
Westinghouse WDPF System
Originally posted by snitz50 on 31 March, 2009 - 11:42 am
What kind of processor is the Westinghouse WDPF and what is its intended use?
New Replies:
Did you get any information about WDPF systems migration? > I am writing my bachelor thesis...
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Calculating Pressure Transmitter Range
Originally posted by Kamaraj on 21 August, 2014 - 7:42 am
How can we test Rangeability of Pressure Transmitter?
New Replies:
what is the output of this transmitter? suppose its output is 04-20 mA than zero and span would...
Topic: Continuous process industries, DCS questions.
from the Chemical Engineering department...
PI Controller on a Reactive Distillation Column
Posted by Seyed Soheil Mansouri on 21 August, 2014 - 6:46 am
Tuning a PI controller for a dynamic reactive distillation column model.
Topic: Continuous process industries, DCS questions.
from the Heads, flows, pumps & motors combined department...
Pipe sizing for fluids and pump/motor selection
Originally posted by Eric on 20 August, 2014 - 5:14 pm
How do you select pipe size, metal as well as corresponding pump type with motors for process industry?
New Replies:
There are well known formulas for determining pressure drop across valves and thru piping and...
Posted by Eric on 20 August, 2014 - 5:34 pm
Selection process for gearboxes & chain for conveyors & packaging machines
Topic: Continuous process industries, DCS questions.
from the OSI vs. Aspen department...
OSI Pi versus Aspen Info Plus 21
Originally posted by holger on 6 July, 2010 - 6:22 am
Chemical company with batch processes has to decide if they buy Aspen tech or OSI.
New Replies:
go for GE Proficy Historian, Best in solution and pricing as well.......
Topic: Power generation equipment control.
from the Forum department...
PX_VIB_GAIN in Mark V
Originally posted by anonymous on 12 May, 2009 - 12:16 am
how PX_VIB_GAIN in mark V works?
New Replies:
I was on-site and had a look at this. The gain change was NOT a function of speed as the machine...
Perhaps GE has set the gain to vary with shaft rotative speed to create a sort-of parametric...
Topic: Application Questions and Problems
from the Instrumentation and Control department...
Replacing a Ball Valve with a Different Control Valve
Originally posted by Kamaraj on 19 August, 2014 - 5:47 am
how can we replace mechanically ball valve into electric or pneumatic valve?
New Replies:
few possibilities, you need to replace the valve, or at least contact the manufacturer of the...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Control Valve Position Command Signal
Originally posted by Gary on 11 August, 2014 - 2:28 pm
Looking for a device that generate control valve position signal for open loop control
New Replies:
the correct terminology is Remote/Local for the Setpoint Adjustments Auto/Man for automatic...
I think Roy got it - manual station. I thought almost any PID controller had an auto/manual or...
I believe you are looking for a Manual Loading Station, I haven't seen one for years. If you are...
just put your controller in manual and adjust the output > I need to manipulate a control...
This post of mine is not related to my other post about the integrating actuator TM-55. Sorry for...
Gary, If you are wanting to "...manipulate [the integrating] control valve's...
Most control valves are available with a positioner. Provide an analog signal (0-10V or 4-20mA for...
Topic: Continuous process industries, DCS questions.
from the Operation department...
Lube oil temperature and bearing vibration
Originally posted by lock_out on 12 June, 2007 - 10:33 pm
Is there any correlation between lube oil temperature and bearing vibration?
New Replies:
Check if you changed the OIL PUMP (attached to the turbine axis) during your last shut down. If you...
Topic: Power generation equipment control.
from the Mechanical department...
Atomizing air cooler modification
Originally posted by Izhar on 9 August, 2014 - 3:29 am
Atomizing Air Cooler Modification
New Replies:
> Power Saved in kWhr = (Main AA Comp Power rating in kWhr)*(Turbine running hours) > This...
Izhar, Power Saved in kWhr = (Main AA Comp Power rating in kWhr)*(Turbine running hours) This...
Izhar, What are each of the columns in the data? I see "GT," "Fr,"...
CSA/SB Thanks a lot for your inputs. CSA I really appreciate your responses. I am really sorry,...
I want to add my two cents. >> How would I be able to by pass the AA system as we are...
Izhar, I would be extremely surprised--but not shocked--to learn that there is no temperature...
One more thing, How would I be able to by pass the AA system as we are using gas only. We some time...
Thanks CSA/Fluidflow. I am learning al ot from you guys. Here is my response: CSA We have two...
Hello There, Atomizing Air is utilized for a)Make right solution of air fuel mixture in...
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Understanding Run Back in Burner Management System
Posted by fluidflow on 16 August, 2014 - 11:13 am
What is Run Back in a Boiler Operation?
Originally posted by MPAC on 15 August, 2014 - 1:29 pm
What is the difference between a Mark V type 'A' and a type 'B' Panel? Can you tell by looking at it?
New Replies:
MPAC, No; one can't tell from looking at the outside of the panel, or even by opening the doors...
Topic: Software, including programming, OS issues, etc.
from the urgent department...
Honeywell DCS & ESD Load Calculation
Posted by mostafa qasemi on 13 August, 2014 - 2:02 pm
CPU load calculation for control modules (in C300).
Posted by Gerald Beaudoin on 13 August, 2014 - 12:09 pm
A manufacturer of a valve and actuator specs the life at 2 million cycles and defines a cycle as 0-90 % movement. If a valve sits all day oscillating around 50-60, what constitutes a cycle for preventative maintenance purposes?
Posted by Benjamin on 12 August, 2014 - 3:39 pm
I need advice about a gas processing plant I'm trying to design, as an exercise.
Topic: Continuous process industries, DCS questions.
from the Forum department...
weight measurement from DP tx
Posted by bipin on 9 August, 2014 - 1:47 pm
weight measurement in a liquid tank which has different densities
Topic: Continuous process industries, DCS questions.
from the Forum department...
Null Current of Integrating Actuator
Originally posted by Gary on 7 August, 2014 - 11:49 am
What is the null current of an integrating actuator?
New Replies:
Wow, you are the best, Robert. I got more than I could from the woodward technical support. Thanks...
Robert Scott, EXCELLENT write-up! Thanks very much....
The TM-55 Actuators come in two types. One is the Proportional type. (This is not the type you...
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
RTD Thermowell Response Time
Originally posted by MSalem on 4 April, 2010 - 7:30 pm
Thermowell RTD response time calculation
New Replies:
Special calibration equipment is typically used for did testing. For 0-100Deg C, temperature...
Hello, I'm preparing a thermal response test setup. In which different temperature sensors i.e...
Topic: Continuous process industries, DCS questions.
from the tempreture control department...
Temperature Controller Problem
Originally posted by mahmoud on 5 August, 2014 - 4:09 am
Problems reading RKC temperature controller.
New Replies:
> I have rkc rex c700 temperature controller. Here is a link to the instruction manual for...
Topic: Local and wide area networking in factory automation.
from the The Banging Head Against Wall Department department...
RS485 Issues - Modbus Temperature Controller to Ethernet
Originally posted by Plutonius on 1 August, 2014 - 9:08 pm
I am currently have a bit of an issue connecting to a Love 2600 temperature controller via RS485 full duplex with a Grid Connect NET485 Modbus RTU to TCP ethernet bridge.
New Replies:
Are both Love and the RTU side of the bridge 4 wire, full duplex? If one side is 2 wire half duplex...
By Lynn August Linse on 4 August, 2014 - 10:17 am -
Do make sure the slave address is correct. For example, if the Modbus/TCP client/master is putting...
Topic: Power generation equipment control.
from the Maintenance department...
Problems with air intake and dirty turbine
Originally posted by Arianna Mambrini on 23 July, 2014 - 4:30 am
Air intake filters clean but turbine dirty
New Replies:
Hello There Eagerly waiting for your reply, as until you reply how can we know how problem was...
Originally posted by Vishal on 1 August, 2007 - 10:12 am
I have a system which transmits signals in RS 232C format. There is a CONTROL System, which accepts signals in RS485 Modbus Format.

Please share you thoughts as to what needs to be done to interface these to systems.
New Replies:
For a complete solution, you can use our Modbus RTU Utility to read the data using our RS-232 to...
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