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OPC Server

Hello, I am having problems with an OPC server. I originally had planned to talk to multiple PLCs using the company's O...
0 comments posted 21yrs
posted by RFleming
0 comments posted 21yrs posted by RFleming

Where is the mistake? A very simple feedback loop

A very simple feedback control loop: input --> *(+-)* ---> 2/(s-1) ---*--> output There is a feedback connection from -...
5 comments posted 21yrs
posted by harry0d88
5 comments posted 21yrs posted by harry0d88

Differential controller for domestic hot water

Hi All I have a solar hot water system installed out here on the East Coast of England (Suffolk). It consists of Thermo...
17 comments posted 21yrs
posted by adrian
17 comments posted 21yrs posted by adrian

DG Classification - Kerosene

Can anyone tell me what the US/Canada Dangerous Goods classification for Kerosene (flash point 40degC) is, and what sta...
15 comments posted 21yrs
posted by cdorrough
15 comments posted 21yrs posted by cdorrough

Battery room ventilation requirements

Hi all, Has anyone seen the latest version of ASHRAE Guideline 21P relating to Battery room ventilation requirements? I...
4 comments posted 21yrs
posted by Raj_Sreenevasan
4 comments posted 21yrs posted by Raj_Sreenevasan

Control of Remote Devices with Serial Ports

If you're trying to do remote control of a device that has a serial port over the Internet (i.e., it's not in the same...
0 comments posted 21yrs
posted by newsguy
0 comments posted 21yrs posted by newsguy

Virus protection

Has anyone got virus protection on their process network, if so which AV product do you use.
2 comments posted 21yrs
posted by dont
2 comments posted 21yrs posted by dont

embedded linux displacing WinCE and VxWorks?

http://www.linuxdevices.com/news/NS4932714398.html The result of this report indicates that Microsoft's CE and VxWorks,...
2 comments posted 21yrs
posted by wireless
2 comments posted 21yrs posted by wireless

4-20mA scaling or offsetting ??????

I am working on a project where I have 1 DC drive which outputs a 4-20mA signal to a VFD, I want the VFD to follow the...
3 comments posted 21yrs
posted by paul
3 comments posted 21yrs posted by paul

Tacho or soft-tacho (from optical encoder)?

Hello, could anyone please give me some general rules or gudlines for deciding whether to choose a tachogenerator or op...
1 comments posted 21yrs
posted by hurak
1 comments posted 21yrs posted by hurak

Employment Oportunities

Good evening to the group, I am a CCST Level II Control / Instrumentation Tech in the Baltimore area looking to broaden...
0 comments posted 21yrs
posted by kb3jlc
0 comments posted 21yrs posted by kb3jlc

Controilling Equipment

Just an announcement that Wally's Wonderful Website (!) is active again after a year and a half of being dormant. Besid...
1 comments posted 21yrs
posted by walter
1 comments posted 21yrs posted by walter

2707-L8P2R DTAM

I have an Allen Bradley #2707-L8P2R DTAM that I am trying to replace. When we put on the new one, it sees the PLC, but...
3 comments posted 21yrs
posted by bgreer24
3 comments posted 21yrs posted by bgreer24

Kalman tuning

Hi, I am a newbie in need of help tuning a Kalman filter. The tuning knobs I have are the process noise of the filter....
4 comments posted 21yrs
posted by motorpg
4 comments posted 21yrs posted by motorpg

FS: RsLOGIX and OMRON

THIS IS A COMPLETE PROGRAMMING BUNDLE TO LEARN AND PROGRAM ON ALL PLC'S, AND ALL MMI. ALL THE SOFTWARE COMES WITH ACTIV...
0 comments posted 21yrs
posted by ahmedobaid
0 comments posted 21yrs posted by ahmedobaid