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DCS Modbus (and other digital) communications

Hey there, Our plant has a Bailey Infi 90 system, and that's the only system I know well. To talk to a modbus device wi...
3 comments posted 21yrs
posted by curtisk
3 comments posted 21yrs posted by curtisk

Valve Linearization

Hey there, I have a valve I have linearized on a pipeline inlet into our sour gas plant. Typically this 8" butterfly va...
5 comments posted 21yrs
posted by curtisk
5 comments posted 21yrs posted by curtisk

100Amps or more brushless servo amplifiers?

I'm looking for manufacturers of such amplifiers which could sustain continuos currents of 100Amps or more. Any clues wi...
1 comments posted 21yrs
posted by gotomytekdigital.com
1 comments posted 21yrs posted by gotomytekdigital.com

How do PLCs get data

A simple question (I've had very little PLC experience, forgive my ignorance) Say I have a device, like a thermocouple,...
5 comments posted 21yrs
posted by kgd_137
5 comments posted 21yrs posted by kgd_137

HART multi-drop cabling design guidelines

Hi, Are there any design guidelines available for HART multi-drop cabling systems (similar to Foundation Fieldbus Prime...
1 comments posted 21yrs
posted by Raj_Sreenevasan
1 comments posted 21yrs posted by Raj_Sreenevasan

Negative differentiator gain

Has anyone ever found the need for a negative differentiator gain? The reason I ask is because I have found that a type...
0 comments posted 21yrs
posted by peter
0 comments posted 21yrs posted by peter

[Shameless Plug] -- Embedded Systems Conference

I'll be delivering two presentations -- PID Without a PhD, and Basic Control Theory for Software Engineers. More detail...
51 comments posted 21yrs
posted by tim
51 comments posted 21yrs posted by tim

Maths Problem - Need all the help I can get!

Sorry for X-Posting but needing help quickly, hopefully someone can assist. The problem: Two voltages v1 and v2 are to...
3 comments posted 21yrs
posted by address
3 comments posted 21yrs posted by address

Current Transformer Test Set

Ratio any transformer, current, potential or power ! 0.1% Accuracy Microprocessor based ! CT saturation test to 1000VAC...
0 comments posted 21yrs
posted by vernon9998
0 comments posted 21yrs posted by vernon9998

Gold Purity

Dears I want to calculate the purity of the gold. Plz tell the formula to calculate the purity. Zalmey
3 comments posted 21yrs
posted by lalshad
3 comments posted 21yrs posted by lalshad

Impedances, Efforts and Flow in Passive Systems

While trying to design a controller for a passive system, I am a bit confused regarding the problem stated below: All s...
5 comments posted 21yrs
posted by sweet_n_mature
5 comments posted 21yrs posted by sweet_n_mature

poles of feedback connected systems

Dear all, is it possible to determine the poles of the combination of two transfer functions in a feedback loop when yo...
3 comments posted 21yrs
posted by mjohan3
3 comments posted 21yrs posted by mjohan3

Profibus

hi everybody iam new member!!! who can help me? about profibus protocol? exact 485? thanks I am working with step7 and...
0 comments posted 21yrs
posted by farhad.farhang
0 comments posted 21yrs posted by farhad.farhang