Why Need 250 ohms resistor in HART protocol
Need of 250 ohms resistor in HART protocol
By Mujahid Chougle on 29 January, 2015 - 10:17 pm
> Why do we need to include 250 ohms resistor in the loop while using HART protocol? -...
Filtering OLTC oil for reuse
ST ACV Command and Feedback Difference
ST ACV command and feedback difference is gradually increasing.
Drop Creation in Emerson DCS Server
Drop creation in Emerson Ovation Dcs.
By CT on 29 January, 2015 - 4:42 pm
> There are two basic types of drops that can be added to a system: workstation and controllers....
Very Low Frequency Grid Oscillations
Very low frequency 0.06Hz oscillations of grid frequency occurring in relatively weak system - not sure of exact mechanism
Electromagnetic flow meter problems
Posted by karthick on 12 May, 2014 - 3:47 am
Totalizer reading on electromagnetic flow meter of chemtrols errors.
Physics of ... Tap-Changer
The question is asked often, but never a viable answer!
Analog and Digital Signal Separation
Analog and digital field cable segregation in marshaling cabinet
Problems with Phase to Phase Heating Elements
Will this redesign have problems?
By Steve Myres on 26 January, 2015 - 11:09 pm
If the heaters are subject to mechanical damage, why not fix the mechanical design instead of...
By Bob Peterson on 26 January, 2015 - 5:46 pm
I am not sure what you mean by the numbers you posted. Are these voltages? What are you measuring...
By runescape on 26 January, 2015 - 4:05 pm
> For the present configuration what are the phase-ground voltage measurements when a...
By Bob Peterson on 26 January, 2015 - 10:57 am
I don't see how you gain anything from most of what you are proposing. Unless the equipment is just...
By runescape on 26 January, 2015 - 2:54 am
> I still don't understand how an ungrounded/unearthed supply influences Heater maintenance. Are...
By runescape on 26 January, 2015 - 2:30 am
I'll try to explain the problem. The machines in question perform a fast chopping motion and...
By Steve Myres on 25 January, 2015 - 8:23 pm
Running heaters with hots only and no grounded conductor shouldn't be causing you any problems;...
By runescape on 25 January, 2015 - 4:26 pm
https://www.dropbox.com/s/jafg1wxik6eftfw/Screenshot_2015-01-25-15-08- 53.png?dl=0 Drawing this...
Control Moment Gyroscope Transfer Function
Question about the methodology of determining the transfer function of a control moment gyroscope.
Writing a Driver for Modbus/TCP
How to write a driver in matlab for aModbusTCP connection between windows pc and an IPC using xPC
ID Fan Indicates Speed When It Is in Stop Condition
ID Fan is in Stop Condition but the DCS shows 700 RPMs
State Space Representation Does Not Work with Superposition Theorem
I need to get the state space model of a MISO circuit. I got the total differential equation from the superposition theorem but its state space model does not work.
Piping Material Specification
Looking for piping material specification information
By Saif on 25 January, 2015 - 3:54 am
Dear, this is very common line numbering system: D363-CH-118: usually give you info. about unit...
Example of Higher Order Control System
Need Examples of Higher Order Control System
Posible Damage from XLPE Cable Load
Effect or damage of XLPE Medium voltage and low voltage cable carrying load
Pings Over MODBUS But There Is No Reply
A PLC does not receive information from an equipment over Modbus TCP/IP protocol.
By Lynn August Linse on 23 January, 2015 - 9:05 am
I think you need to read the 'Ethernet radio' docs carefully! Many do severe packet filtering,...
Selecting A Pressure Switch for Hazardous Environments
Need some help selecting the right pressure switch in an environment with H2S present.
What is Temperature Spread and Delta?
Re-ranging a Pressure Transmitter
Need to re-range a pressure transmitter from 0 - 60 mbar to -30 to 30 mbar.
Master Degree in Automation
Posted by PeruvianAutomation on 20 January, 2015 - 6:40 pm
Looking for a program that offers a master's degree in Automation.
Optimal Control to Eeduce CO2 Emission
Looking for some guidance in designing an optimal control
what is floating earth system?
What is floating earth system? Why it is being used for the MarkIV and MarkV system?
ABB REF542 Plus TCP MODBUS
Looking for software that can log files over MODBUS TCP protocol.
Restriction Orifice Thickness Calculation/Formula and Source Standard
Looking for "Flow Measurement Handbook" by Miller for formula to calculate restriction orifice Thickness .
By d on 17 January, 2015 - 12:03 pm
All stress calcualtions should be done by a qualified mechanical engineer, it is simple enough. One...
Looking for mA to Ohm Converter
Looking for a device that can convert 4-20 mADC or 0-10 VDC to 1~5 KOhms.