Today is...
Saturday, August 19, 2017
Welcome to, the global online
community of automation professionals.
Featured Video...
Featured Video
Wiring and programming your servos and I/O just got a lot easier...
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
Forum Archive
Relay contact oxidation and voltage levels
Posted by Jeremy on 12 December, 2013 - 9:04 am
For signalling and control, is 240vac more reliable?
Communication Failure NOTIFER FACP and MODBUS Gateway Card
Posted by Dinesh Chauhan on 12 December, 2013 - 7:52 am
Communication Failure NOTIFER FACP and MODBUS Gateway Card. (NCM Communication Failure)
Electronic Overspeed Detection
Posted by Karthik on 12 December, 2013 - 7:48 am
What is the response time for an Electronic Over speed Detection system
wonderware intouch software
Posted by Yos on 11 December, 2013 - 1:50 pm
Create pop-up message for user with Wonderward Intouch.
Modbus to DNP Conversion
Posted by jeff g on 11 December, 2013 - 12:07 pm
Looking for Converter
controlling flow between two vessels
Posted by Julius Nkosi on 11 December, 2013 - 12:03 pm
Control the level in a vessel while the other is transferring to the store tank, ensuring that only the desired is transferring while the other is being filled
Motor Starters vs. Breakers/contactors
Posted by Brad on 11 December, 2013 - 10:00 am
Is a motor starter ALWAYS needed?
Aspen InfoPlus 21 historian software or user manual
Posted by MANISH on 11 December, 2013 - 8:57 am
I having project on Matrikon OPC interface with Aspen InfoPlus 21 historian. I never worked on Aspen InfoPlus 21 historian before.
Gas and Air Intake Valve Controller
Posted by khairul on 11 December, 2013 - 2:28 am
I want to know what valve used to control intake of gas and air in GENSET if the electrical voltage as a source of controller.
Differential Pressure Teasing Question
Posted by SB on 11 December, 2013 - 1:13 am
For the trapped flow through the orifice, will any differential pressure be created?
Cognex checker
Posted by C1rcu17 on 10 December, 2013 - 10:13 am
cant get my cognex checker to work
ABB TZID-C Electro-Pneumatic Positioner
Posted by hknclk on 10 December, 2013 - 3:14 am
Control Parameters of TZID-C Positioner
Posted by Rajendra on 10 December, 2013 - 1:36 am
Doubts regarding the calibration and operation of smart type transmitters
Communication Problem with Moscad RTU (8XXXXXX)
Posted by Hassan Tariq on 9 December, 2013 - 11:34 pm
We are facing a problem while communicating with Motrola Moscad RTU CPU 300. It has modbus protocol and we are able to bring around 300 modbus registers using kepware opc server but there are some addresses like 8XXXXX which does not look to be modbus.
Reverse Power Problem in Cummins Generator.
Posted by Hassan on 9 December, 2013 - 11:45 am
Reverse Power Problem.
TGR and EHG faults on FIJI Steam Turbine
Posted by Wajid Hussain on 9 December, 2013 - 5:46 am
TGR light fault and EHG light fault
information about KWK me▀wandler CT bushing
Posted by Mozhgan Abootorab on 9 December, 2013 - 5:39 am
Looking for information about CT Bushing made by KWK Me▀wandler GMBH, used in ABB transformers
Posted by shyam on 8 December, 2013 - 3:11 pm
How to download LVDT feed backs to HMI via eprom?
Load Hunting
Posted by Senthil on 8 December, 2013 - 1:56 pm
Will Load hunting happen when turbine runs in parallel with 2 4MW Engine?
Earthing System
Posted by Zohaib Khan on 8 December, 2013 - 9:36 am
Design of Earthing System
Additional sites to learn about Power Plant Engineering
Posted by babs on 8 December, 2013 - 2:19 am
Any other Sites around for electrical engineering and power plant engineering?
Posted by Len1 on 7 December, 2013 - 4:28 pm
Searching for information to work out formulas
DLN Frame 5
Posted by Mustapha on 7 December, 2013 - 11:22 am
Why is IBH is compulsory when Fuel Gas pressure is lower than 21 barg?
short circuit estimation
Posted by engineer on 7 December, 2013 - 12:41 am
short circuit behaviour
Syncing two rotation machines
Posted by JoseyWales on 6 December, 2013 - 12:43 pm
PLC engineer trying to sync two machines dropping on a conveyor. They drop say 50+times per minute.
Power Factor and Reactive Power Flow for grid compliance
Posted by Stefan on 6 December, 2013 - 6:48 am
Which way does reactive power flow according to Grid power factor requirements
Connecting I/O cards between two PLCs
Posted by Kapil on 6 December, 2013 - 12:18 am
How to give the signal of one PLC to other PLC.
24V ac power supply can be laid with control cables in same conduit.
Posted by prem sagar on 5 December, 2013 - 1:51 am
24 v AC power supply can be laid with same conduit with control cables.
Serial link reliability
Posted by Ahmed on 5 December, 2013 - 1:00 am
Can I use serial communication between DCS and ESD to take close valves or should i use hard wired communication. This loop has no SIL and isn't essential for compressor shutdown
Centum Vp and VMware
Posted by Manas on 4 December, 2013 - 11:13 pm
How to create a virtual Centum Vp Engineering Station?
PLC training
Posted by Rick Lareva on 4 December, 2013 - 12:55 pm
Looking for books or other references for PLC training.
Control Valve Positioner Action & Travel Scale
Posted by Kazim on 4 December, 2013 - 10:01 am
Control Valve FF positioner (Masoneilan FVP-110) Action (Direct/Reverse) and travel scale range.
EExed and EExde certification
Posted by KHG on 3 December, 2013 - 2:15 pm
EExed and EExde certification and hazardous area question
WonderWare Upgrade Issues
Posted by lmcpeek8 on 3 December, 2013 - 11:44 am
Upgraded PC. WonderWare updated from 7.1 to 2012 R2 (10.6).
EIPNET anybody used it?
Posted by Mark Q Norman on 3 December, 2013 - 10:03 am
This looks good but no examples.
Allen Bradley DH+ network with RSLogix OPC server
Posted by Ala Zand on 3 December, 2013 - 6:33 am
Unable to read/write data from/to a A-B PLC 2/30 on DH+ network using RSLinx as OPC server
DWATT value
Posted by emelito on 3 December, 2013 - 4:59 am
Can the sudden change of DWATT to negative value can cause a trip of a Gas Turbine generator?
BLDC speed range
Posted by Johan on 3 December, 2013 - 3:46 am
How to increase maximum speed of a brushless DC motor?
Composer Not Connecting to Controller
Posted by FU on 2 December, 2013 - 11:41 pm
Assist with connection issue between Harmony Composer and BRC300 Controller
Going to Premix Mode from Lean Mode
Posted by abdi on 2 December, 2013 - 11:37 pm
why premix not done in GE FRAME9
GE Application Experience - GEZ-3226BB
Posted by GE on 2 December, 2013 - 5:08 pm
GEZ-3226BB - GE Application Experience
woodward controller 8290-190
Posted by Lance on 2 December, 2013 - 2:44 pm
idle stability control board
Ethernet/IP via HMI Advanced
Posted by Mark Q Norman on 2 December, 2013 - 8:54 am
Using HMI Advanced to test my Ethernet/IP device.
Creating Passwords in Vijeo Designer Lite
Posted by tsaii on 2 December, 2013 - 4:52 am
How to create and use passwords in Vijeo Designer Lite
Posted by Mohsen on 2 December, 2013 - 12:56 am
What is the common range of approach temperature for an economizer in HRSG of a combined cycle plant?
jet pulse filter
Posted by Andalas University on 2 December, 2013 - 12:10 am
application of bag filter with jet pulse filter system
attainable isentropic efficiency for gas turbines
Posted by Abudu kamal on 1 December, 2013 - 12:14 pm
the quest to discover the attainable isentropic efficiencies of gas turbines in gas power plants would be very important in creating a guideline for gas power plant design
3 Phase system (Electrical)
Posted by Santanu Das on 1 December, 2013 - 10:41 am
3 phase distribution transformer
MB300 Upgrade
Posted by Mikey on 30 November, 2013 - 10:50 am
MB300 infrastructure upgrade options.
EX d obstruction
Posted by Peter Watson on 30 November, 2013 - 9:56 am
Obstructions of flamepaths on ex d equipment. Do minimum distances apply to ex d spigot joints?
Kienzle ER3/2 ER3 ER112 Protocol
Posted by Volttan on 30 November, 2013 - 9:12 am
Kienzle ER3/2 ER3 ER112 Protocol
Watlow F4 not being detected
Posted by Paul on 29 November, 2013 - 9:39 am
Watlow F4D will communicate with one computer but is not detected on another.
Unity Pro dynamic array
Posted by polar54 on 29 November, 2013 - 4:42 am
use of unity PRO dynamic array allow
Ex e certified enclosure with an intrinsically safe circuit
Posted by Arsalan on 28 November, 2013 - 2:22 am
Exe or Ex ia enclosures. Both the certifications are unclear.
Automation and Control
Posted by Sri Vignesh on 27 November, 2013 - 11:42 pm
Advice on studying for a Masters in automation and control
Wire Marking
Posted by bill on 27 November, 2013 - 9:33 pm
Looking for a certain type of wire marker
Grounding Shield cable for automotive/robot
Posted by Hanlin on 27 November, 2013 - 11:38 am
if the robot or others use a battery do we need to ground the shield?
Using a smartphone to communicate with RSLogix
Posted by Mark on 27 November, 2013 - 3:05 am
Using a smartphone to communicate between RSLogix and PLC
IOLink reviews
Posted by James Ingraham on 26 November, 2013 - 6:03 pm
Has anyone tried IOLink?
Inverted Pendulum Balancing
Posted by Javier on 26 November, 2013 - 4:38 am
I have some theoretical questions about a problem with Inverted Pendulum Balancing
Modbus tcp/ip with serial gateway response format
Posted by aroon on 26 November, 2013 - 12:30 am
Response format for the modbus tcp/ip with serial gateway tsxetg100
Scripting visual basic in Factorylink
Posted by Oriel Babilonia on 25 November, 2013 - 12:21 pm
I having a lot of error with script in visual basic of Scada Factorylink V7.5 of siemens.
HART communication
Posted by P. Mahesh on 25 November, 2013 - 5:04 am
HART multidrop limitation
Type of Enclosure Protection Class
Posted by sAm on 25 November, 2013 - 1:13 am
Does anyone has hierarchy of protection class (for example: Exd > Ex nL).
SCADA Software Language
Posted by raju on 23 November, 2013 - 11:16 pm
What software language does SCADA use?
WINCC software training
Posted by Mohammad Balal on 23 November, 2013 - 5:23 am
Looking for WINCC V6.2 training software Download
Woodward Governor Servo Position Controllers
Posted by j_dubya on 22 November, 2013 - 11:25 pm
Woodward Governor Servo Position Controllers not following demand
How to link Simulink model into GUI in Matlab
Posted by ravindra on 22 November, 2013 - 2:07 pm
Linking a GUI interface with simulink for water tank application
Ethernet/IP and Python
Posted by Mark Q Norman on 22 November, 2013 - 9:31 am
Need some help on using Python to test Ethernet/IP implementation.
agitator motor control and working condition indication
Posted by sudheesh on 22 November, 2013 - 12:36 am
agitator motor control and working condition indication
PID Controller philosophy for Distributed controlled systems
Posted by sanjiv on 22 November, 2013 - 12:22 am
Standards defining controller status (auto/manual) in DCS in case of failure of input
WinCC tags
Posted by aryan on 21 November, 2013 - 2:31 am
Creating new WinCC tags?
Serial Server Connection to Ethernet Problem
Posted by Tim Olson on 20 November, 2013 - 1:15 pm
I am having problems getting through my serial server to the device connected to its COM port.
Arduino Communication Library for S7
Posted by Dave Nardella on 20 November, 2013 - 11:47 am
Free Ethernet library for ARDUINO
BSR and Bit Shifting
Posted by Marcos on 20 November, 2013 - 9:30 am
Usage of a BSR and bit shifting
Temperature Transmitter Span Setting and Calculations
Posted by Rizal28 on 20 November, 2013 - 9:15 am
Temperature Spans - Different span, different measurement
Induction Motor in the Dynamometer Application
Posted by ElecEngEnas on 20 November, 2013 - 8:51 am
Inquiry about an Induction Motor in the Dynamometer Application eNews # 320 - 20 November 2013
Posted by Jim Pinto on 19 November, 2013 - 8:03 pm
The latest eNews is on the web
Lock Graphic focus in FactoryLink
Posted by Rick on 19 November, 2013 - 2:17 pm
Need to lock the focus of graphic in FactoryLink
Frame 6B Flow Divider Speed?
Posted by MarkBT on 19 November, 2013 - 9:20 am
Can anyone help with some information on the flow divider?
temperature compensation equation
Posted by Jerome on 18 November, 2013 - 2:53 pm
how to compensate an air flow signal for temperature compensation
Honeywell PKS OPC Connectivity
Posted by Mechatronica on 18 November, 2013 - 2:04 pm
Trying to connect Honeywell control valves to OPC
High lube oil tank Pressure in a frame 5D gas turbine
Posted by CLNG on 18 November, 2013 - 9:56 am
Help needed to understand high lube oil tank pressure.
Gas Turbine Shut Down Signal
Posted by abdi on 18 November, 2013 - 6:16 am
changing the signal trip of HRSG Boiler from the shut down gas turbine signal to speed's gas turbine reach to 2850 rpm.
Minimax System
Posted by Saad on 18 November, 2013 - 5:56 am
having problems with the Minimax FMZ4100 system in our plant as several loops and groups are malfunctioning.
HEX/Decimal to date and time from modbus
Posted by Thomas Nissen on 18 November, 2013 - 3:37 am
HEX/Decimal to date and time from modbus
Passing an analog value from PLC to DCS
Posted by Michael on 18 November, 2013 - 2:53 am
Transferring an analog value from a 1769-OF8C AO to a Series C (C300) Honeywell Experion AI IOMA.
Short circuit resistance and reactance
Posted by aryan on 18 November, 2013 - 2:41 am
short circuit resistance and short circuit reactance.
Need recovery from Wonderware Intouch window maker starting error
Posted by mohamed azad on 18 November, 2013 - 12:43 am
I am having some working troubles in wonderware intouch window viewer
Mark-V and Proficy Historian
Posted by sdbarman on 17 November, 2013 - 11:57 pm
Communication between Historian and Mark-V Cimplicity 5.1
Profibus Connection issue
Posted by Nick on 17 November, 2013 - 7:26 am
Profibus connection :: How to connect 3 Profibus RS 485 cables into one RS 485 socket.
Steam Turbine Commissioning
Posted by Mxromen on 17 November, 2013 - 6:34 am
After commissioning GE C7 Steam turbine, what kind of tests needs to be done?
Using CMS in MKVIe
Posted by Ch Amir Islam on 17 November, 2013 - 5:47 am
What is the function of CMS (Configuration Management System Software)?
Steam Flow Switch
Posted by Ben Janvier on 16 November, 2013 - 10:24 am
Need a steam flow switch for MP Extration
Orifice flow
Posted by Vimal Gupta on 16 November, 2013 - 9:41 am
Spray water flow transmitter shows reading after spray control valve opening above 60%. Below 60% valve opening, flow in Tx shown zero.
How to troubleshoot a PLC
Posted by Femi on 15 November, 2013 - 6:16 pm
What are the causes of PLCs breakdown/failure
Re: How can I communicate with PLC 5/10 or PLC 5/15
Posted by Ikhtiander on 15 November, 2013 - 11:49 am
Communication PLC5/10 & PLC5/15 with laptop through serial (9 pin) connector or USB
Modbus rtu over rs232, Master sending requests continuously
Posted by Rachit Kumar on 15 November, 2013 - 9:41 am
No mention of this possible scenario in specification.
exhaust frame blower motor for GE 7FA Turbine
Posted by Mohammed Akbar Khan on 15 November, 2013 - 8:11 am
Exhaust frame motor is drawing high current during start up.Later after turbine loads its amps reduce.
Intrinscally safe solenoids and non IS cables
Posted by Goran on 15 November, 2013 - 7:29 am
IS barriers + IS solenoid + NON IS illuminated cable