Today is...
Tuesday, September 17, 2019
Welcome to, the global online
community of automation professionals.
Featured Video...
Featured Video
A tutorial introduction to programming using the QuickBuilder Programming Environment.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
Forum Archive
Mark-IV Logic Forcing ID CODE is Disabled
Posted by SANJAY MALLIK on 25 April, 2019 - 2:13 pm
Our Mark-IV control system of GE Gas turbine having logic forcing issue as Id Code which is require to force the logic have been disable since 2017.
Calculating the Parameters for an Asynchronous Motor
Posted by Dipen on 25 April, 2019 - 12:53 pm
Using an asynchronous motor to control the flow of material for a 3D printer
Modbus TCP to IEC 104
Posted by trn31 on 25 April, 2019 - 2:46 am
Need help reading live data into IEC 104.
Modbus TCP with OMRON E5EC
Posted by sherry on 24 April, 2019 - 10:29 pm
How to get the OMRON controller address to read/write
MarkV Servo Range
Posted by sid100 on 24 April, 2019 - 12:10 pm
How to check servo range from IO_CGF.LST File in MarkV?
Electrical Energy Measurement
Posted by shaheed on 24 April, 2019 - 4:02 am
Calculation requested for Multiplying factor for Electrical Energy Meter where there is difference in meter volt and PT volt.
Why Need Submersible Marine Liquid Level Sensor?
Posted by Holykell on 24 April, 2019 - 3:59 am
Is it necessary to use a submersible marine liquid level sensor for measuring seawater level?
Modbus Communication from S7 400 to PSCA GE Module
Posted by Filimone on 24 April, 2019 - 1:56 am
After upgrade from S7 315-2 DP processor to S7 414-4H, receiving bad quality data error
Auxiliary Boiler
Posted by SSAAFF on 23 April, 2019 - 1:22 pm
Definition of what a hot standby for auxiliary boiler is
Motor Protection Questions
Posted by monkey77 on 22 April, 2019 - 1:36 pm
MPCB's, Contactors and Overload relays
How to Control Exhaust Temperatures?
Posted by farhankhan2019 on 22 April, 2019 - 7:52 am
We have GE Frame 9E machines control is of GE MARK-VIe. We want to control exhaust temperature of turbine.
Aeroderivative Engine PGT25+G4
Posted by shahabas on 22 April, 2019 - 3:03 am
Why there is no electrical pump in aeroderivative engine?
AGC Fail in Power Plant
Posted by loghman on 20 April, 2019 - 2:52 am
When the unit is under control of AGC, which conditions causes that the unit gets out from Remote control?
GE Fanuc 90-70 Backup
Posted by kld_rm on 19 April, 2019 - 10:19 am
Backup of PLC GEFanuc 90-70 on laptop.
Measuring Steam Quality
Posted by ryanb on 18 April, 2019 - 4:00 pm
Need a good way to measure the quality (dryness fraction) of saturated steam going into a hospital sterilizer.
Reversing an Allen Bradley Servo
Posted by dgauthier54 on 17 April, 2019 - 9:56 pm
Reverse a servo, Allen-Bradley 2094-AM02 module, on an existing, proven machine.
RO Calculation for Flow Measurement
Posted by sfatehi on 17 April, 2019 - 7:00 am
RO calculation for variable area flowmeter before it.
Submersible Hydrostatic Pressure Level Sensor: the best solution of static pressure level measurement
Posted by Holykell on 17 April, 2019 - 3:16 am
Submersible hydrostatic pressure level transducer uses a pressure level sensor of 316L stainless steel housing and MEAS TE diffusion silicon core as the signal measuring component
EGT 20 Deg C Lower Than Expected
Posted by wanfauzan on 17 April, 2019 - 2:51 am
During cogen plant commissioning, EGT during full load is 20 deg C lower than expected, which results in less steam in HRSG simple recovery. Can the EGT be increased will IGV setting?
Communication Fault in Bailey DCS800xA System
Posted by jabbi_king on 17 April, 2019 - 2:12 am
Communication fault in NCOMMERR on IMMFP02 in DCS800xA System after upgrade from INFI 90
Engine Exhaust Temperature Sensor (Thermocouple)
Posted by rakibcnrd on 17 April, 2019 - 12:43 am
Engine head thermocouple installation process.
GE frame V Gas Turbine Starting Device Trip
Posted by SANJAY MALLIK on 15 April, 2019 - 3:40 pm
GE frame V gas turbine trip due to starting device trip at 2200-2300 rpm during startup where as starting diesel speed is 1900 happens 4 to 5 times during startup.
Installing VNET Card Driver for CENTUM CS 3000
Posted by ashistc on 14 April, 2019 - 10:20 am
Problem in installing VNET card driver in PC. Three cards appearing instead of two.
Recording Data to Excel for Every Hour For More Points
Posted by Mohammed on 14 April, 2019 - 6:02 am
How to record reading from HMI at every one hour in excel sheet?
IGV Control On
Posted by Chromatin on 14 April, 2019 - 2:02 am
Why does inlet air temperature increase? Is it because IGV control is on?
Grounding an Equipment Enclosure
Posted by magic_din on 13 April, 2019 - 5:04 am
Grounding an equipment enclosure to an available TGB
An SSR to Control AC Loadbank at 1kHz PWM
Posted by ianfinlay on 12 April, 2019 - 3:35 am
Looking for an AC SSR (Dc Controled) switching up to 200A
GE Frame7AE Exciter Control
Posted by jeff33003300 on 11 April, 2019 - 8:29 pm
Question around generator voltage control.
Enthalpy Drop Across Steam Condenser
Posted by SSAAFF on 11 April, 2019 - 5:42 pm
What is the best enthalpy drop across the air cooled condenser for steam turbine? What the effect of ambient temperature of the air cooled condenser?
Measuring Petrol Level in Oil Tank
Posted by Holykell on 11 April, 2019 - 3:24 am
The only answer for measuring petrol level in fuel tank.
Machine Automation and Integration standards
Posted by sanchit9590 on 10 April, 2019 - 12:31 pm
Looking for line integration and machine programming standards, similar to PackML is packaging lines and can be extended to other machines
Honeywell Experion CM Slow Scheduling
Posted by Big_Dale on 9 April, 2019 - 7:39 pm
Honeywell Experion R4.1 - want to schedule a PID block to execute once an hour.
Bailey INFI90 DCS
Posted by matifou on 9 April, 2019 - 5:51 am
BAILEY INFI90 DCS obsolescence
Nexgen 2000 PLC
Posted by Akin Segun Sunday on 8 April, 2019 - 3:44 pm
Communication and I/O logic of Nexgen 2000 plc
Implementation of Modbus RTU Protocol in AVR
Posted by Rudrendu Mahindar on 8 April, 2019 - 9:50 am
Implementing Modbus RTU protocol in atmega32
GE Frame 5 Ratchet Issue
Posted by mousaab on 7 April, 2019 - 9:44 am
Turbine ratchet not running
Temperature High Spread
Posted by metti on 7 April, 2019 - 2:15 am
High spread temperature trip in HITACHI H-25 gas turbine at startup
GE Frame-9E Standard Combustion Machine
Posted by rokan_123 on 6 April, 2019 - 1:04 pm
GE-9E Load behaviour in Temperature control mode ON & OFF are different.
Bulk Modbus Points Display
Posted by chaudhurysid on 6 April, 2019 - 5:38 am
Displaying 25K Modbus points on a computer without PLC.
L64D_P/N - Intermittent Voter Mismatch
Posted by Zachary747 on 5 April, 2019 - 11:11 am
Intermittent L64D_N and L64D_P voter mismatch alarms on Mark V
Instrumentation Training
Posted by kody916 on 4 April, 2019 - 8:18 pm
Website for online instrumentation training
GE D11, LP Inlet Pressure Control SP?
Posted by Kurths on 4 April, 2019 - 7:56 pm
We have two GE7FA.05 CT's on a GE D11 steamer. I'm trying to nail down exactly what the LP inlet pressure adjustment is used for.
Mark V Start Motor and Shaft Turning
Posted by sommy_35 on 4 April, 2019 - 2:26 am
Start motor does not take over shaft turning
Blind Spot of Non-contact Ultrasonic Level Sensing
Posted by Holykell on 3 April, 2019 - 4:31 am
Regarding the dead zone that occurs in the use of the non-contact ultrasonic level sensing.
Gas Turbine Trip Due to Damper Open Signal Loose
Posted by mrabby on 2 April, 2019 - 12:28 am
HRSG at the rear of the diverter damper fallen.
Posted by learning_elec on 1 April, 2019 - 4:26 pm
I need to find a way of using toolboxST without a server
Simulator for GE Mark VI
Posted by engsofian on 1 April, 2019 - 2:15 pm
What is the procedure for the setup of GE Mark VI simulation?
Field Instrument or Design for Pull Cord in Belt Bonveyor
Posted by boosterhidrogen on 1 April, 2019 - 4:48 am
Better design/sensor for pull cord switch in belt conveyor
Easy PC code for Logging Modbus TCP
Posted by 111sas111 on 1 April, 2019 - 1:23 am
Looking for source code for a Windows environment to use with Modbus so I can build a basic historian.
Power Plant Generator Control
Posted by tommy_yotsakorn on 1 April, 2019 - 12:05 am
Power plant generator control mode between MVAR, voltage control and PF
Startup/Shutdown/Trip Effect on Turbine Lifetime
Posted by nldgseeker on 31 March, 2019 - 2:50 am
Could you please advise what the effect of unit shut down, trip, start up on turbine life time?
MarkVIe: When put in ISO generator purging is shown
Posted by Esoteric_Stone on 30 March, 2019 - 6:26 pm
The turbine was running on the droop mode. When its mode was changed in to ISO, Generator purging was shown in HMI (status_fld).
Synchronization in MarkV and MarkVIe
Posted by Esoteric_Stone on 30 March, 2019 - 5:54 pm
I want to discuss synchronization in detail including the logic of relays K25, K25P and K25X.
Removing Measurement Orifice Plates to Stop Restrictions in Pipeline
Posted by Winwinston on 29 March, 2019 - 12:14 pm
Question About Removing Measurement Orifice Plates to Stop Restrictions in Pipeline
Process Historian: PI Vs PHD
Posted by selva on 29 March, 2019 - 4:50 am
Does anyone have a latest comparison of Process Historian systems, PI versus PHD? List of Advantages/Challenges.
Mark VIe: Excessive Volt/Hertz Trip
Posted by Esoteric_Stone on 28 March, 2019 - 7:23 pm
Within five seconds after synchronization, GT is tripping on EXCESSIVE VOLT PER HERTZ trip.
The Efficiency of Ultrasonic Level Sensor
Posted by Holykell on 28 March, 2019 - 5:34 am
The efficiency of ultrasonic level sensor can be improved by monitoring the fluctuation of liquid level in pump station
High Exhaust Temperature Spread
Posted by Madupat on 28 March, 2019 - 5:01 am
Our GT, frame 6, Mark 6E, trips on high temperature spread when on gas firing mode.
Mark V to MarkVIe Migration
Posted by Mousaab on 28 March, 2019 - 2:25 am
Mark V Life extension
Frame 6 DLN Loading Issue
Posted by minhao_lee on 27 March, 2019 - 10:27 pm
Inspection of 11KV Generator and Its BL Exciter
Posted by champak on 27 March, 2019 - 1:20 pm
How to inspect LSTK power generation (with HRSG boiler)
Approved Diesel Fuel Shut-off Valve
Posted by vsegvic on 27 March, 2019 - 12:49 pm
Looking for producers of type approved fuel shut-off valves.
Modbus. dll File for VB or Excel
Posted by Adolfo Leon Hernandez Abadia on 27 March, 2019 - 11:42 am
Modbus. dll Is required for VB or Excel
Modbus TCP Reading 32 bit Registers Problem
Posted by Ricardo78 on 27 March, 2019 - 10:08 am
Trying to read the input registers through Modbus but have problems with 32bit registers.
When Do I Need Y-Pattern Needle Valve?
Posted by Tharwat on 27 March, 2019 - 7:52 am
I want to purchase needle valves as a replacement for built-in needle valves (Y Pattern).
Supply of Reactive Power through Generator/Exciter
Posted by MGP on 27 March, 2019 - 5:09 am
We are planning to provide ancillary service to the grid by means of reactive power support by raising or lowering the excitation of our turbo generator.
Posted by kld_rm on 26 March, 2019 - 4:51 pm
HAZID study requirements
TNR Reverse Power Not Detected
Posted by sugarboi on 26 March, 2019 - 9:33 am
cause of TNR reverse power Not Detected
COe Emissions
Posted by shouvonik22 on 26 March, 2019 - 7:48 am
Questions about Servomex 2700 combustion gas analyzer for measuring oxygen percent and COe(ppm) emissions
VAR Control on Siemens SGT5-4000F
Posted by tonytomson on 25 March, 2019 - 8:05 am
Help needed with VAR control as part of reactive capability curve verification
Controlling Two Micromaster 440 Drives
Posted by Crowfoot on 25 March, 2019 - 6:41 am
Looking for a method to control two AC drives which must work together driving a semi coupled load.
HART Communication
Posted by problem on 24 March, 2019 - 8:24 pm
HART communication between field transmitter and MTL5544D
MarkVIe Deadbus Breaker Closure Simulation
Posted by Esoteric_Stone on 24 March, 2019 - 3:48 pm
How to simulate the DEAD BUS BREAKER closure while the GT is off but the BUS is LIVE.
GE Speed Protection
Posted by jalestine on 24 March, 2019 - 11:19 am
What is meant by protective and control speed?
Confusion over SRV Checkout on Frame 6B with a Flenco DLN1 Gas Module
Posted by Stumped on 23 March, 2019 - 5:41 pm
Frame 6B (as only) combustion turbine DLN1 module has a fisher V300 ball valve as an SRV. Confused on discrepancies between original control document and original commissioning book.
Wheelspace Thermocouple Exact Location
Posted by Techieraa on 22 March, 2019 - 8:41 am
Want to gain a clear understanding of wheelspace thermocouples
Fluid Batching Application
Posted by Tofunmi on 22 March, 2019 - 4:27 am
Water batching process control solution which will have a batch counter (E+H RA33), Control Valve, and E+H Flowmeter (Picomag)
Frame-3 GE GT EOP Motor Characteristic Curves
Posted by vikas on 22 March, 2019 - 2:59 am
Looking for Frame-3 GE make GT EOP motor characteristics, efficiency load curves, etc.
Modbus RTU Help
Posted by JD_mod on 21 March, 2019 - 8:09 pm
Need modbus help. Issues with read functions sending to master.
Serial Communication with Gardner Denver ES+ Controller
Posted by gallo27 on 21 March, 2019 - 5:41 pm
Having trouble trying to communicate to Gardner Denver ES+ Controller via RS232 serial connection. Trying to send ASCII requests to controller but I don't get anything back.
Learning Supcon and Other DCSs
Posted by santosh sarma on 21 March, 2019 - 1:46 pm
Portability of things learned from using Supcon to other DCS
Flue-gas Desulfurization (FGD) Logic Insterlocks Design
Posted by ArenasM on 21 March, 2019 - 3:39 am
Are there any regulations (EU or others) that define the limitation and regulation of the startup of a Boiler if its FGD is out of service?
Foundation Fieldbus
Posted by autogeek on 20 March, 2019 - 6:46 pm
Difference between FF, HART, 4-20ma communication. Does a FF transmitter require 4-20ma signal?
Modbus Communication with Danfoss VLT FC360
Posted by MONAK on 20 March, 2019 - 6:04 am
Cannot fetch data on serial communication using Modbus with Danfoss VLT FC360.
Activate Tables Menu in Instrument index of INtools
Posted by dovestar on 20 March, 2019 - 3:07 am
Activating the tables menu in SmartPlant Instrumentation
SFC CPU Card Replacement Fault
Posted by ansmehmood on 19 March, 2019 - 11:17 am
Converteam SFC installed at our site and now have problems after replacing a problem CPU card.
VFD on 300 KW , 440 Volts Compressor
Posted by mushahid on 19 March, 2019 - 12:46 am
Replacing Reduced voltage starter to VFD on 300KW Motor drive compressor
Polling Slaves from 2 Masters
Posted by Sean Campbell on 18 March, 2019 - 8:20 am
Can devices configured as Modbus Slaves send data to 2 separate Masters?
High fuel flow
Posted by psajay1992 on 18 March, 2019 - 3:04 am
Working on simulation for 6FA machine. Need help to debug.
Modbus RTU to Bluetooth
Posted by chromeaccent on 15 March, 2019 - 11:50 am
modbus RTU to bluetooth converter
PLC Programing Beginner
Posted by kwameplc on 15 March, 2019 - 11:04 am
Looking for advice on the purchase of a training kit to learn PLC programming at home
A New Modbus-TCP Server Simulator
Posted by Talat Dogan on 15 March, 2019 - 9:47 am
New Modbus-TCP Server Simulator freeware is ready for download.
Coal Power Plant Coordinated Unit Control
Posted by Micik1 on 15 March, 2019 - 9:11 am
Basic types of unit control in a coal fired power plant
Model-free Controller Simulation
Posted by David on 15 March, 2019 - 8:57 am
I am designing model-free controllers and I would like to simulate its performances.
Installing a Flowmeter to Calculate Gas Quantity and Display Information in Control Room
Posted by abdouzita103 on 15 March, 2019 - 3:58 am
Installing a new flowmeter to calculate gas quantity passing through a pipe and displays in control room
Should I use a Regenerative Drive?
Posted by imran0413 on 15 March, 2019 - 1:51 am
Load is driving motor so motor is actually working as generator. Is there any advantage of installing Regenerative drive?
Mark 5 Processor Showing Faults
Posted by Hamed87 on 14 March, 2019 - 12:57 pm
Mark 5 processor showing faults and alarms after restart
Online Calculator for Time-Optimal Jerk-Limited Trajectories
Posted by cheeco on 14 March, 2019 - 6:14 am
Calculate and download time-optimal trajectories with jerk limitation online
Loadcell with S7 1200 and HMI
Posted by burakuzun on 13 March, 2019 - 4:03 pm
weight control with using Siemens S7 1200 and HMI screen
Induced Over Voltage Test of Transformer
Posted by shaheed on 13 March, 2019 - 8:09 am
What will be the normal current during during the test of induced over voltage of a 200KVA 11KV/400V 3 phase transformer?