Today is...
Saturday, November 28, 2015
Welcome to, the global online
community of automation professionals.
Featured Video...
Featured Video
Watch an animation of a conveyor stacking operation demonstrating the use of a move on a gear command.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
Forum Archive
High Vibration on Axial Compressor
Posted by Jhon wick on 27 November, 2015 - 8:40 am
Found high vibration on 11 stage axial compressor at 2nd bearing housing.
Struggling with PID
Posted by thucar on 27 November, 2015 - 2:05 am
New to the whole process control and PID world but determined to make my custom PID controller work. i've hit a bump on the road though.
Two 4-20mA Signals from a Single 4-20mA Signal
Posted by Ikhtiander on 26 November, 2015 - 8:07 pm
Looking for a cheap device that can re-transmit a single 4-20mA signal to two 4-20mA signals. Something like a repeater device that can split the 4-20mA signal into 2 streams without signal degradation.
Software Details Required - Siemens
Posted by mufeedh6 on 26 November, 2015 - 7:16 am
Needs details of the supporting software to communicate Siemens PLCs to Wonderware SCADA
Demonstrate Function Check of Zener Barrier
Posted by Akdas on 26 November, 2015 - 3:13 am
Demonstrate function check of Zener barrier
How to Model a Control System?
Posted by Dawud_Beale on 25 November, 2015 - 5:36 am
Need help with how to develop a control strategy and develop a modelling document
Neutral Contact while Synchronizing
Posted by lakmalp on 24 November, 2015 - 2:50 am
Why the neutral of generator should be disconnected from grid after synchronization?
In RSView All 32 Trends Windows Only Show "Loading Historical Data Files"
Posted by Shayan on 24 November, 2015 - 1:46 am
In RSView32 while opening trends window "Loading Historical Dta Files" is appearing and not displaying any trends.
What Does DIN 3210 - G0 Stand For?
Posted by SRPO9002 on 23 November, 2015 - 4:16 pm
What is DIN 3210 and ISO 5210 stands for?
Vibration Sensor Monitoring
Posted by allen bradley on 23 November, 2015 - 12:45 pm
What is the use of system monitor (3300/03) in Bently Nevada.
Emerson Ovation Standalone Virtual Host Installation
Posted by pointgrey on 23 November, 2015 - 12:10 pm
How to install Emerson Ovation standalone virtual host
ATEX Certification
Posted by viki03v on 23 November, 2015 - 5:19 am
Combination of Ex d and Ex m through I.S. barrier
What Would You Look for in DCS HMI?
Posted by Nagesh_Mysore on 23 November, 2015 - 2:32 am
Since DCS has inbuilt HMI, what would be your key features you look for from HMI perspective?
Selecting Fuses for Switch Gear Relay
Posted by khaleel on 23 November, 2015 - 2:06 am
Any one suggest me how to calculate the fuse rating.
Air Leak Checks in Low Pressure System
Posted by kmnskiran on 22 November, 2015 - 10:58 pm
How to find out minor air leaks from polyurethane and push in fittings
Flow Measurement
Posted by ect_09 on 22 November, 2015 - 10:27 pm
How pressure transmitter can be use as flow transmitter?
Single Loop Controller Configuration
Posted by anandshnkr1990 on 22 November, 2015 - 10:17 am
Configuring a Single loop Controller
Gas Turbine 9FB Trips after Combustion Mode Change
Posted by elomoon on 21 November, 2015 - 9:15 am
In a gas turbine 9FB single shaft configuration in two successive starts, when stopped being 12 hours, it is then they start shooting to change the mode of combustion of 1D to 3D, a DLN 2.6 system.
Liquid Level Indicator
Posted by salahelwakil on 21 November, 2015 - 1:30 am
How to repair cable attached to liquid level indicator?
Yokogawa Prosafe RS Edit
Posted by haideralallaq on 20 November, 2015 - 5:13 pm
Need to add, edit, remove some loops in the logic on Yokogawa Prosafe RS
DNP3 to AB PLC through OPC
Posted by on 20 November, 2015 - 12:37 pm
I have DNP3 devices that push unsolicited updates to an OPC server. I have a CompactLogix PLC that needs to consume that information.
Real World Examples of Analog Output Card Applications.
Posted by bin95 on 20 November, 2015 - 11:08 am
What are some real world examples of PLC analog output card usage besides the obvious motion control?
Different Values between Analog Input to PLC in HMI and Field Instrument.
Posted by Macerick on 20 November, 2015 - 9:02 am
Analog input current drops only during plant running but in shutdown it's normal.
Minimum CPH Inlet Temperature
Posted by radharaju on 20 November, 2015 - 8:44 am
what should be minimum CPH inlet temperature and minimum flue gas temperature at outlet of CPH in case of HRSG running on Natural Gas.
Frame-V Gas Turbine Flame Detector Bypassed
Posted by barindra75 on 20 November, 2015 - 8:14 am
Frame-V gas turbine running in gas fuel, flame detector bypassed.
Installing DeltaV 11.3 on Windows 7 Platform
Posted by rodrider on 20 November, 2015 - 6:05 am
Steps for installing DeltaV 11.3 on windows 7 platform
Zero Trimming DP and P and Multivarible Transmitters
Posted by chillwin on 19 November, 2015 - 10:04 am
How would I go about zero trimming a DP and P on a multivarible transmitter?
Migration Aspentech to OSi Soft Using OPC
Posted by datacontrol on 18 November, 2015 - 7:19 pm
Historian Migration from Aspentech to Osi Soft
Questions on MkVI (EGD) - OPC Server communication
Posted by luissz on 18 November, 2015 - 4:26 pm
Developing an HMI for a MkVI. Can EGD consumer exchanges be defined as read/write direction?
Generator NDE Bearing Axial Vibration High
Posted by vithalani on 18 November, 2015 - 12:30 pm
Problem with high vibration at generator NDE in axial direction after excitation.
PCA198-CXB Arcnet Card Berg Jumper Guide
Posted by topcat123 on 18 November, 2015 - 11:03 am
Looking for Arcnet card type PCA198-CXB jumper setting guide.
Graduate Fellowship for PhD in Control
Posted by snoroozi on 18 November, 2015 - 6:42 am
I am looking for a control engineering graduate who wants to do a sponsored PhD.
Monitoring I/O data from a PLC Using Visual Basic
Posted by faidhizakwan on 18 November, 2015 - 6:04 am
Want to send data to a PLC using visual basic and also read output data from PLC using visual basic.
Frequency Drive and Communication Cable Ground
Posted by Kingrosekhan123 on 18 November, 2015 - 4:57 am
Can frequency drive and communication cable have the same ground?
MKVI - Synch. Permissive Trouble (K25P - TTUR)
Posted by vince64 on 17 November, 2015 - 5:18 pm
Synchronization not working: permissives ok but K25P not activated; auto synch ok, K25 is activated at each synch turn; no closing command for the 52G breaker
Chromalox Temperature Controller Alarm Output
Posted by TheSource on 17 November, 2015 - 11:26 am
Looking for some input or guidance on getting 120V output for an audible alarm on a chromalox temperature controller.
Mapping Registers to Data Reference
Posted by Juergen on 17 November, 2015 - 7:47 am
I do not know how I have to map our generator paramters to the MODBUS TCP Addresses.
Fire Mode
Posted by Maythem on 17 November, 2015 - 6:13 am
What is the main uses of fire mode?
PLC and Gear Motor help
Posted by AlfredoAMD on 17 November, 2015 - 12:51 am
Trying to find a proper combination of a PLC and Gear Motor for a simple chain conveyor system I'm developing.
Questions About Combustion Nozzle Design
Posted by jameelrahman on 16 November, 2015 - 1:04 pm
Trainee engineer in gas power plant has questions about combustion nozzle design.
M-bus to USB/RS-232 adapter to Convert M-bus to MODBUS
Posted by brandons on 16 November, 2015 - 3:50 am
Looking for a recommendation on an m-bus to usb/RS-232 converter to convert from m-bus to MODBUS
Fire and Gas System / Safety Instrumented System
Posted by allenbradley on 15 November, 2015 - 1:44 pm
Is FGS linked with SIS?
Citect Modbus with FloBoss600
Posted by hany5757 on 15 November, 2015 - 11:47 am
Have the CPU of floboss 600 flow computer with its front panel and no screen. How to access the data that sent from it to Citect HMI through MODBUS?
Is an Automation engineer in India a Diploma Level or technician Level Job?
Posted by Rushi Shroff on 15 November, 2015 - 8:03 am
Is job of an Automation engineer in India merely 'Diploma level' or technician level?
Microsoft Message Analyzer
Posted by EuroEager on 15 November, 2015 - 4:46 am
Microsoft Message Analyzer capabilities for Modbus
Problem Saving Data on Delta PLC
Posted by mahshid on 15 November, 2015 - 3:34 am
Delta PLC overwriting data at shutdown
Modicon Quantum Failure
Posted by maticman38 on 14 November, 2015 - 8:40 pm
Hi, I'm new to this forum. Modicon Quantum PLC fault.
How Many PLCs Are Required
Posted by manmod on 14 November, 2015 - 1:30 am
How many PLCs are you using in an oil/gas measuring station?
MODBUS with Different Power Supplies
Posted by Azayel on 13 November, 2015 - 9:41 pm
MODBUS, two different power supplies 12V and 24V.
Control Valve Sizing
Posted by anaalmansuri on 13 November, 2015 - 5:33 pm
Control Valve Cavitation Problem
Bently Nevada Vibration Monitor
Posted by allenbradley on 13 November, 2015 - 3:35 pm
Connecting/using Bently Nevada vibration monitors
MODBUS Device Interface Segregation
Posted by Matthew Raterman on 13 November, 2015 - 2:10 pm
Best practices for separating various devices communicating to a MODBUS master to minimize communication failures.
Fire and Gas Control Panel Configuration
Posted by fatimafert1 on 13 November, 2015 - 11:43 am
Promel FGP 04 communication problem on GE gas Tubine
What Will Happen if Delta Connected Motor in STAR
Posted by Gmahesh on 13 November, 2015 - 2:04 am
Motor winding heated due to wrong connection?
Voltage Control Generator
Posted by Taha Omar on 12 November, 2015 - 3:30 pm
how can a voltage control generator supply real and reactive power?
Posted by Eradz on 11 November, 2015 - 6:45 pm
Trying to get MODBUS TCP over IPsec VPN
3051 Capsule Transmitter Out of Range
Posted by junah on 11 November, 2015 - 2:06 am
3051 capillary transmitter out of range problem
1771-IL Manual
Posted by Bruce427 on 10 November, 2015 - 8:34 pm
Need manual for an old 1771-IL isolated input module. SERIES A - Rev B
Experion PKS Display Blackout/Inverted Video
Posted by mcwv on 10 November, 2015 - 7:08 pm
After DCS conversion from Foxboro I/A to Honeywell Experion PKS R430, analog values will flash black for one refresh rate periodically.
Emergency Lube Oil Pump for ALSTOM 13E2
Posted by sudamadhav on 10 November, 2015 - 6:41 pm
Emergency lube oil pump for 13E2 is designed on what basis? For 13E2 its a twin speed; why twin speed?
Time Synchronisation in GE 369 and 469
Posted by Noor on 10 November, 2015 - 1:54 pm
I want to time synchronize GE 369 and 469 relays
QA Testing... Beyond Point 2 Point
Posted by Gage_Stryker on 9 November, 2015 - 5:43 pm
When point to point fails to pick up wiring issues...
Internal Failure Message in Atlas Copco Air Regulator
Posted by govoni2015 on 9 November, 2015 - 3:27 pm
Atlas Copco Air Regulator Electronikon shutdown and is flashing error
Sewer Backup Problem
Posted by Bernie V on 9 November, 2015 - 2:51 pm
Looking for equipment to monitor building sewer line flow so we can be alerted to an imminent backup.
MODBUS on Siemens S71200 PLC
Posted by urimadar on 8 November, 2015 - 10:30 am
Writing to Siemens S71200 PLC using TCP/IP MODBUS
Air Coming from AA Booster Compressor Body Vents
Posted by barindra75 on 8 November, 2015 - 6:40 am
Mild hot air is coming out from AA booster compressor body vent holes when booster compressor is not in operation.
Steam Turbine Load Reduction
Posted by Sandeep on 8 November, 2015 - 5:07 am
Steam turbine load reduction
Mark VIe - Live and Initial Value
Posted by Sardar99 on 8 November, 2015 - 3:08 am
Can somebody explain me what are the live value and Initial value?
SIMOCODE with TIA Portal
Posted by Jamal Hamdan on 7 November, 2015 - 5:43 pm
SIMOCODE with TIA Portal
MW Hunting in GT
Posted by vinayak_paranjape on 7 November, 2015 - 1:31 pm
MW hunting in Gas Turbine
SAPCV That Will Reduce and Control from 8 bar to 0.1 bar
Posted by VJ on 7 November, 2015 - 7:52 am
Looking for a self-regulating valve that can reduce and control from 8 bar to 0.1 bar output
Excitation Control of Hydrogenerator
Posted by manojbaral on 7 November, 2015 - 4:01 am
Field voltage of brushless excitation system for a hydro-generator of 22 MVA capacity
Slow Level PID Loop
Posted by Ormo on 6 November, 2015 - 7:50 pm
Slow level PID loop with telemetry delay
Safety Barriers and Isolators
Posted by AllenBradley on 6 November, 2015 - 10:46 am
How does process transmitters function when it is connected to a barrier or isolator?
AB OB16E Electronic Fuse Tripping
Posted by mjtracy on 6 November, 2015 - 10:43 am
I am getting a Fuse LED lit up on my 1756-OB16E output module when energizing multiple output channels.
Isentropic Efficiency Calculations
Posted by AdamIR on 6 November, 2015 - 3:55 am
Calculating isentropic efficiency for compressors, not sure about absolute pressure
Inter Domain Communication Issue in Yokogawa DCS after Upgrade
Posted by Kaleemullah Memon on 5 November, 2015 - 10:41 pm
Inter Domain Communication Issue in Yokogawa DCS after Upgrade from CS3000 to VP R5.04
Safety PLCs
Posted by BillyMac on 5 November, 2015 - 9:09 pm
Learning about safety PLCs
Migration from SLC500 to 5000
Posted by BillyMac on 5 November, 2015 - 9:02 pm
Time to migrate to 5000 platform
Yokogawa Centum VP 4.03 in Windows 7 environment
Posted by Bolek on 5 November, 2015 - 3:14 pm
I need to install Centum VP 4.03 on HIS in Windows 7 environment.
Recommended Low-Cost Modbus RTU Mixed-Signal Remote I/O Module
Posted by beck92 on 5 November, 2015 - 12:35 pm
Seeking recommendations for a simple, low-cost Modbus remote I/O module w/ analog I/O, digital I/O, 2A+ relays
Provox Algorithm
Posted by betress on 5 November, 2015 - 12:00 pm
Has anyone converted Series PID Algorithms to Velocity PID Algorithms?
Can No Longer Verify MODBUS String from Slave Device
Posted by SMF on 5 November, 2015 - 8:27 am
Modscan software quit working suddenly, and I cannot reestablish communication with slaves.
Communication between SI580E and PLC Modicon 340
Posted by hassansaper on 5 November, 2015 - 5:58 am
How to read data via RS 485 from Load Cell indicator SI 580E in Unity Pro
SIL Calculation for HIPPS Loop
Posted by SpecialProjects on 4 November, 2015 - 11:13 pm
When to use Risk Reduction Factor (RRF) in SIL calculations
GCV Fluctuations
Posted by bkarim55 on 4 November, 2015 - 2:20 pm
Could the GCV Instability to be the raison that the GT goes to Exhaust temperature Control?
Interfacing Printer with a Light Signaling Incoming FAX
Posted by Lance on 4 November, 2015 - 1:13 pm
Can a printer/fax machine act as an input for a lamp to signify incoming faxes?
Small Address Model MODBUS
Posted by Marcelo Mancilla on 4 November, 2015 - 10:40 am
How to read MODBUS registers with small address mode and convert to MODBUS register to large mode (1-49999)?
E stops
Posted by engineer1000 on 4 November, 2015 - 4:54 am
Type of 2 core wire to use to wire e stops together
Robot E-stop over Ethernet - Guardlogix
Posted by RoboKD on 3 November, 2015 - 1:15 pm
Guardlogix Ethernet module to robot safety
MODBUS Link with VFD
Posted by REJIN GEORGE on 3 November, 2015 - 6:04 am
Encountering a VFD-PLC communication problem while communicating with HMI
Getting Error Code 0x01 While Doing Transmission
Posted by BPatel on 3 November, 2015 - 5:44 am
Modbus TCP Frame giving 0x01 error message.
Difference Between an AC-DC-AC Inverter and AC Inverter
Posted by Gama81 on 2 November, 2015 - 10:52 pm
What are the differences between an AC-DC-AC inverter and an AC inverter, even the DC inverter?
Alternator Stator Windings Insulation
Posted by champion_ip4p on 2 November, 2015 - 5:50 pm
How far does VPI are water resistant?
Air Extraction from Compressor Discharge
Posted by Obiloko4 on 2 November, 2015 - 11:06 am
Cooling of extracted air from compressor discharge.
Piggyback 4-20 ma Signal from DP Transmitter?
Posted by acmercg on 2 November, 2015 - 9:23 am
Need to mate a new system with old one. Can I piggyback 4-20ma signal from DP transmitter?
S5 1430 TCP connection
Posted by bobmarcel on 2 November, 2015 - 12:46 am
How to establish communication between S5 115U via CP1430 TCP and S7 using a TCP connection with out ISO on TCP connection?
Auto Transformer Issues
Posted by azizam on 1 November, 2015 - 10:45 pm
Auto transformer with automatic on load tap changer
Interested in Learning Allen-Badley PLCs?
Posted by sdgates on 1 November, 2015 - 10:26 pm
Looking for feedback from potential/future Allen-Bradley users.
Gas Turbine GE PG9171E Flow Parameters
Posted by AAK on 1 November, 2015 - 11:56 am
Gas turbine PG 9171E design flow parameters are required. Gt inlet air flow, Gt exhaust air flow and air flow from 5 stage (cooling and sealing air).