Posts from...Today, Friday, April 18, 2014
from the Department department...Do I Understand PID's?
Just want to see if I understand these things.
A PID controller output depends on the error between the process variable PV and a target value or...
from the Forum department...Driving a Stepper Motor
I am seeking advice on the best methods to effectively control a stepper motor.
from the Instrumentation department...Vitec Vibration probe
Installing Vitec 4033-500 in place of 4033-400 velocity transducer
NVS, I don't believe the impedance difference will affect the Mark IV, but you should be certain...
By Franco Kew on 18 April, 2014 - 4:42 am -
Impedance here referring to the electronic segment from your sensing element. 4033-500 is designed...
from the inst department...Gulde control valves
Suppliers of GULDE control valves.
By Dipankar Biswas on 17 April, 2014 - 11:41 pm -
> Please let me know the suppliers of GULDE make control valves. We M/s Continental Valves...
from the instrumentation department...I/P positioner and I/p transducer Control valve
Difference between I/P positioner and I/p transducer
Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not...
By oil&gas on 17 April, 2014 - 5:26 am -
hi sir, I had a question why diaphragm is not used in i/p converter? why they using the bellows?...
from the Instrumentation and Control department...Communication between Speedac NXT weighing Controller and Honeywell Scada
Speedac NXT controller is not communicating with Honeywell Server via RS 485 serial communication.
Was the former device communicating properly right up until it was replaced or is the replacement...
from the ANY department...Software suggestions
New to automation and searching for a simple solution on some safety concerns.
from the Automation department...Hall/Magnetic Sensor
Hall Sensor Replacement Failed !
I can think of 4 common and several not so common output configurations for this type of sensors,...
from the Control department...SynGas Conversion Project
Pointers for Syngas Conversion project in India
Abhishek... what type of conversion process is involved? For example is it: a) Coal to Syngas? ...
from the Control&Automation department...Preselected mode for Mark V
PreSelected mode when connected to grid and Mark V trip
K.R. Manish, What is FGMO, please? This is a good discussion, and as such, I hope you...
By K.R. Manish on 17 April, 2014 - 3:44 am -
Dear CSA, With reference to the FGMO mode which you have described, I agree with you that it is...
from the Forum department...Can I say my device is MODBUS-RTU compaible when.....
Could I say that with the following facts my device is MODUS-RTU compatible
By Lynn August Linse on 17 April, 2014 - 11:10 am -
Looks good to me, and the 'no parity' option *IS* important as some Modbus devices don't support...
from the Instrumentation department...ML1400 PLC communicate PIC 16f874 over modbus protocol
ML1400 PLC communicate with PIC 16f874 over modbus protocol and write data to LCD connected to microcontroller
from the Forum department...MODBUS Break Condition & Checksum
MODBUS RTU using RS485 to RS232 converter connected to RS232 to USB converter to communicate with electric meter using MODBUS Poll.
By Lynn August Linse on 17 April, 2014 - 10:53 am -
Having the RS-485 +/- reverse (or swapped) will usually look like a BREAK condition if blindly...
By Steve Myres on 16 April, 2014 - 1:04 pm -
Maybe try a different converter (or your current setup with another slave). FTDI sells some that...
from the Automation department...DCS Yokogawa Communication Issue
Yokogawa DCS communication with Modbus slave device using ethernet redundant connection with ALE111.
By Elbert van der Bijl on 17 April, 2014 - 5:15 am -
this behavior is by design and it will not occur when the Modbus slave is correctly responding to...
from the Instrumentation & Control department...Liquid gas level measurement
Liquid Gas Level measurement
By Sam on 17 April, 2014 - 3:45 am -
The instrument to use in a application like this is a DP with capillaries and chemical seals with...
from the Forum department...Effect of improper grid connection on reactive power
Increase in reactive power drawl at generation source.
By K.R. Manish on 17 April, 2014 - 3:22 am -
Hi Neo, From what you have described, it sounds like that the generators are tripping due to...
from the measurments department...Standard for temperature measurement
Location of temperature measurements (problems)
from the Communications department...OPC server communicate with OPC server
How do one OPC server share data with another OPC server?
In order to facilitate such communication you typically use an OPC client that connects to both...
from the Forum department...Instrumentation cables sizing
Instrumentation cables sizing
By Franco Kew on 16 April, 2014 - 6:03 am -
Dear Ahmed Sami, Your question is incomplete I can say. Cable cross section and hazardous area...
from the Salse Department department...GPRS data transmission
Using GPRS modem to send data from PLC to OPC server on a PC with SCADA.
do you have a static IP address for PLCs? Alex. Contact me. Skype: skype_redfox...
from the Computer department...Serial Communication VB Code
Continuous reading of serial input
from the Forum department...Vijeo Citect ModBus RTU Write Problem
Vijeo Citect ModBus RTU Write Problem
> Anyone got the solution? try without tagwrite tagname = ArgValue1...
from the Automation and EMS department...Modbus Data transmission time
How to calculate time to receive data from slave to master in daisy chain connection of slaves, if my slaves are 20 and single master.
By Patrick Lansdorf on 16 April, 2014 - 1:55 am -
Hi, I have made a simple Excel sheet, where one can calculate the line time. You will need to...
By Steve Myres on 15 April, 2014 - 12:55 pm -
Slick idea on the prefetch! ...
By Lynn August Linse on 15 April, 2014 - 9:31 am -
>> What's a rule-of-thumb value for >> RTU-TCP latency in a Digi Modbus bridge...
By Bhadresh Sarvaiya on 15 April, 2014 - 1:29 am -
> Mr. Linse, > What's a rule-of-thumb value for RTU-TCP latency in a Digi Modbus bridge...
from the Forum department...SCADA RTU in Substation
Why use SCADA RTU in a substation? What is the purpose of SCADA RTU?
from the INSTRUMENTATION department...UREA FLOW METER
What type of flowmeter can be installed in a Urea duct as a source of FD and ID fan in the duct?
By Billy on 15 April, 2014 - 10:30 pm -
What are you measuring? Just air flow? We use a DP transmitter for our prill tower air ducts....
from the Which HMI do you simply Love or Hate? department...TOP 10 list of Best and Worst HMI & SCADA
I know everyone has their personal preferences, but I think it would be more interesting to discover which software is the Best or worst...
By Devin Montcrief on 15 April, 2014 - 12:28 pm -
> WinTr is advanced SCADA SOFTWARE for monitoring and saving data of manufacturing processes...
from the Level Control department...Magnetorestrictive Level Transmitter issues
Extreme vibration and loss of signal on level transmitters
By Sam on 15 April, 2014 - 8:12 am -
Hi Mateus, there is only one instrument when you are working offshore on a FPSO or Platform...
from the Power Electronic Engineering department...Medium Voltage Drive Variable Frequency Drive
Application of Medium Voltage Drive in industry to save energy, obtained desired output
from the I'm in trouble department...MODBUS ABB ACS550 Connection trouble
MODBUS connection trouble... How to create a virtual COMM port
By MC on 14 April, 2014 - 6:39 pm -
Looks like USB conversion would be your best alternative. Here's a device from a company that...
Song Title of the Week:
"They're putting dimes in the hole in my head to see the change