Posts from...Today, Tuesday, March 11, 2014
from the Forum department...Power Factor Correction Panel
How to decide the Kvar required in a power factor correction panel to improve the power factor of 25 Kva load.
Sensorless… your statement that kVAr is "negligible" is in error. The figures you cite...
from the Forum department...Modbus TCP connection only sends 113655 Bytes of data before timing out.
I am creating a Labview VI which aims to send a MODBUS command over a TCP connection every 10 ms however, this only works up until 113655 bytes of data have been sent then the connection times out.
By Curt Wuollet on 11 March, 2014 - 9:17 pm -
Perhaps check if you are leaving connections open. Regards cww...
By Harvard on 11 March, 2014 - 6:47 pm -
Sound like a memory leak. Is it possible Labview is keeping each and every response in memory...
from the amazing department...analog signal 4-20ma/0-10V to rs232/485 by modbus RTU
Converting the analog signal such as 4-20ma,0-10V to rs232/rs485
By Curt Wuollet on 11 March, 2014 - 9:15 pm -
Get a Koyo Click from Automation Direct. Up to 36 channels of analog + RS232 and RS485 built in...
from the Forum department...Over current problems
Timed neutral overcuurent
Phil, The unit in question is now out of service for a top-end overhaul. We'll have to wait...
Don... thanks for the SLD. The three line-current CTs are wye-connected, and the 51N is responding...
Donnapa14... mine is Cepsicon [@] aol [.] com Phil...
Phil... here's my email address: donnapa14 [@] yahoo [.] com. Can you furnish me your email address...
Donnapa14... since your setup now consists of paralleled generators the situation becomes more...
Phil, With 2 units online running parallel, the usual per phase current draw is from a low of...
from the Engineering department...What is the Standard 3-phase voltage supply in the US
Nominal or "Standard" 3-phase voltage supply in the US? Is there a standard? If not, what is considered the "most common" industrial 3-phase supply distribution voltage?
By Bob Peterson on 11 March, 2014 - 8:22 pm -
4160 is pretty common. -- Bob http://ilbob.blogspot.com/...
By Bill Schwarz on 11 March, 2014 - 1:24 pm -
ANSI/IEEE Standard 141 (red book) specifies standard nominal system voltages. These also appear in...
By jimmy kwe on 11 March, 2014 - 5:08 am -
Sir, if may i know, what a standard medium voltage in usa? It's same like europe? 3kv/3,3kv... ...
from the Forum department...Flow meter's current output fluctuating
Flow meters in parallel pipe lines with same water source have current output fluctuations
Is it possible to check the flow with a portable ultrasonic meter to rule out any hydrodynamic...
By d- on 11 March, 2014 - 12:08 pm -
you might try using an electrical jumper between the piping flanges if you have metal piping, or...
By annonymous on 11 March, 2014 - 10:55 am -
Thanks for the detailed suggestion. Earthing provided to the flow meter is proper. In Fluctuations...
from the instrumentation department...transmitter calibration
General procedure for sensor trim of transmitter
Not exactly, you may gain some accuracy if you do the sensor trim close to the values of LRV/URV...
By NVQ on 7 March, 2014 - 11:28 pm -
As per your reply, I understand that for trimming the sensor input by apply LRV, URV to sensor....
from the Instrumentation department...Pressure transmitter
What will happen when connecting the 4-20 mA output of one transmitter parallel to other transmitters slot of PLC?
from the Engineering department...Control Room & Rack (Cabinet) Room design
Guidelines and standards for Control & Rack room design
By anonymous on 11 March, 2014 - 3:42 pm -
I suggest you choose one of the top5 DCS vendors and read their site planning manual thoroughly. ...
from the Forum department...HMI selectors identification
identifing some selectors on the HMI
Amr Karam24, Hello, again. 1) You probably already know this, but SC likely stands for...
from the Network Trouble department...Network Storms
Network Storm taking down control System.
from the AUTOMATION department...Best practice for flow measurement
For certain flow measurement what would be the best practice
By peter walker on 11 March, 2014 - 11:56 am -
Walt Some advice please. It is common practice to estimate flow rate from control valve...
from the Forum department...Modbus read error "break condition"
Schneider converter with modbus poll
from the load the machine department...Can I have power output from Gas Turbine starting 95% speed?
Loading the gas turbine without after 95% speed.
By Bob Johnston on 11 March, 2014 - 5:17 am -
"The generator output power through 11kV is taken directly, and feed directly to load. since...
> Kind of strange question. How are you going to "load the generator" if the breaker...
Controls_guy, Sorry, but your explanation is not clear. Most non-black start GE-design heavy...
By controls_guy on 10 March, 2014 - 8:49 am -
Thank you for quick response and detailed answer, Further to the continuation of the question, I...
By Bob Johnston on 9 March, 2014 - 8:20 pm -
Kind of strange question. How are you going to "load the generator" if the breaker is...
Controls_guy, Without closing any breaker? I don't think so. Having said...
from the Forum department...GE LM 6000 VBV position error
VBV a, b position feedback difference of 8-10%
from the Report generator department...Easy to use reporter package for Scada
Looking for an easy to use and flexible reporting package over the WEB.
By Achille1982 on 10 March, 2014 - 2:49 pm -
Hello, RBSReport is good for reporting. Cheap and easy. www.rbsreport.com...
from the Accurately measuring the goo department...Level measurement in conical polymer tank with mixer
Measuring liquid polymer level in a 1500 gallon High-density linear polyethylene conical tank with a mixer in the center and pump discharge in the bottom.
By Walt Boyes on 10 March, 2014 - 1:09 pm -
You have a real problem, because what you want is the "level in the tank if the mixer is...
from the Forum department...DC lube oil pump
How to operate the DC lube oil pump and the hydraulic at the same time
amr karam, You're welcome. When I get unusual questions like this it's usually the result of one...
By amr karam on 9 March, 2014 - 6:09 pm -
Thanks for your help, And i hope that i didn't disturb you by these abnormal operational...
There seems to have been some kind of event that you are trying to understand.... If you would just...
By Amr Karam on 9 March, 2014 - 9:04 am -
Thanks for your reply. Uhmm, I know i will have the turning gear motor locked if i lost the lift...
from the Forum department...level control in grain silo
What do you use to monitor the level of grain in a silo?
I have used rotary switches frequently in grain bins and they work very well. I have done very...
from the Forum department...AC/DC Ratings
AC/DC rating of switchgear
Engineer... although their "thermal" rating may be equal, i.e., Trms = Tdc, their...
from the ABB Advant department...ABB OS500 upgrade
ABB OS500 upgrade to newer version HP B2600
By MIKEVI on 8 March, 2014 - 4:55 pm -
Will, I will attempt to give you some answers to your questions, or at least what my experience has...
from the Forum department...power capacitor placement
power capacitor placement for a circuit
Engineer... Power Factor Correction (PFC) equipment location, in descending order of...
from the electrical department...votage drop
What voltage drop occurs in following case?
Duke... this subject is quite popular on this forum. I suggest you search Control.Com Archives for...
from the Automation List department...SB9600/SBEP protocols
Looking for any documentation source, web site, etc. regarding these protocols
By Paul on 8 March, 2014 - 5:43 am -
Hi Check out: http://paulbanks.org/projects/sb9600/ which is an open source library written in...
from the Forum department...Historian to DataWarehouse
Does anyone have experience with moving data from an Historian (PI, Proficy, Aspen, etc..)to a Data-warehouse?
By anonymous on 8 March, 2014 - 2:47 am -
Hello, Are you trying to move all the archive? If yes, Why would you do that? Rgrds....
from the Forum department...EEPROM Failure on Woodward Powersense Card
EEPROM Failure on Woodward Atlas II Powersense Card
from the Forum department...Gigaware Model 2603487 usb-serial converter pinout
pinouts for a Gigaware (bought at Radio Shack) model #2603487 USB to serial converter.
All of the adapters I've seen have the same pinouts as a 9-pin serial PC connector: ...
from the Custom Cabling department...Making extension for Molex P4 connector
Need to extend supplied cables that connect Adjustable Height Table legs to Controller Box.
from the I don't know what I'm doing department...Calibrating a Rosemont 3051
Trying to calibrate a 3051 for 4-20ma in a open tank.
Hi, here are a few things you could check: Have you remembered to press the "Apply"...
from the Forum department...Precise Position Control of Brushless DC Motor
Position Control of BLDC Motor with resolution of 1 degree. How to achieve it?
By Rolf Anderson on 7 March, 2014 - 1:57 pm -
> We routinely position servo motors to within 2 counts out of 2x10^6 counts/rev > of the...
New crypt. See /usr/news/crypt.