Today is...
Sunday, March 26, 2017
Welcome to Control.com, the global online
community of automation professionals.
Featured Video...
Featured Video
EtherCAT with CTC’s master lets your multivendor network play well together...
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
Forum Archive
2
replies
Questions on Lift Oil and Effect of Orifice Pressure
Posted by Aptx4869 on 16 November, 2016 - 9:42 am
Effect of the lockable flow control valve on lift pressure. Orifice effect on pressure and flow rate.
CC-link Communication
Posted by Madhumati on 16 November, 2016 - 6:25 am
Using CClink Slave NT and observing that I/O data bytes are getting shifted.
4
replies
Modbus RTU Polling Delay
Posted by Graham Pyatt on 16 November, 2016 - 5:06 am
Implementing Modbus RTU system (PLC to 4 slaves). Necessary to set the polling delay to 100mS. No indication of polling delay requirement in Modbus Protocol. Why a delay?
5
replies
Hitachi H-25 Gas Turbine Exhaust Spread and Wheel Space Temperature
Posted by MHB on 14 November, 2016 - 2:15 am
Facing high exhaust temperature spread on our Hitachi H-25 gas turbine since August. After HGPI in October high exhaust temperature spread observed again on machine start up.
7
replies
Gas turbine Speed VS Load
Posted by bmehda on 13 November, 2016 - 12:26 pm
Questions about load for a gas turbine running three centrifugal compressors in series
1
reply
Problems with Level Measurement Using Displacer Sensor
Posted by Shamsuddin on 12 November, 2016 - 2:50 am
Problem faced in level measurement using displacer sensor 249B with DLC3010, Process pressure 700 psi and Process temperature 80 Degree F to 100 Degree F.
8
replies
RS485 Challenge
Posted by tansie on 11 November, 2016 - 7:11 am
One RS485 device does not work when it is in the RS485 network with the other six devices, but it works when it is the only device on the network.
1
reply
Testing Overspeed Sensor
Posted by geeH on 11 November, 2016 - 6:31 am
Testing a Perkins 838/14 over speed sensor
2
replies
VCRC Diagnostic Trouble
Posted by Obiloko4 on 10 November, 2016 - 4:23 pm
There are certain alarms that are active and holding the unit from getting to Ready to Start
1
reply
Modbus TCP Connect with Website
Posted by Kasia on 10 November, 2016 - 3:59 pm
Can I connect from website with PLC S7-1200
9
replies
GE Frame 6b Ratchet Motor
Posted by davidmcc on 10 November, 2016 - 12:37 pm
What steps do we take after a ratchet pump failure?
South East DCS User Group Meeting
Posted by Joe Scott on 10 November, 2016 - 9:41 am
South East User Group DCS Meeting in Birmingham AL
3
replies
BT Fan Stopped on Cooldown Timer Complete
Posted by vimal gupta on 10 November, 2016 - 5:37 am
Frame-V machine turbine vent fan stops on T62CD timer completion
SGT-600 Bearing RTDs
Posted by Dimonaman on 10 November, 2016 - 1:50 am
Looking for information on Siemens SGT-600 bearing RTDs
1
reply
Cascade PID for Density & Flow Control.
Posted by fuzzymridul on 9 November, 2016 - 8:22 pm
Density & Flow Control with dosing in line.
1
reply
Modbus RTU Communication Between HMI HNC-TP2507 and DANFOSS FC51
Posted by Sebastian Azcurra on 9 November, 2016 - 3:02 pm
I need to operate an FC51 with an HMI (HNC)
1
reply
HRSG
Posted by mna on 9 November, 2016 - 2:03 pm
GTs with triple pressure HRSG with line from IP econ
4
replies
Compressed Air Extraction from Heavy Duty Gas Turbine
Posted by niazbibiyana on 9 November, 2016 - 11:30 am
I need to be clarified about various types of air extraction from compressor side at heavy duty gas turbine (9F.03)
8
replies
3 Way Valve Drain Port "Vent"
Posted by Aptx4869 on 9 November, 2016 - 11:13 am
Benefit of 3 way valve drain port, stamped "vent"
5
replies
Power Problem
Posted by Marvin on 9 November, 2016 - 10:16 am
VFD Causing Harmonics
2
replies
LM 6000 Dual Compressor
Posted by SK on 8 November, 2016 - 11:05 pm
Why does the LM6000 use LP and HP compressor and LP and HP turbine?
Bently Nevada Module 3500/61
Posted by Mihir Ramkrishna on 8 November, 2016 - 6:45 am
Temperature Display problem in BN 3500/61 module when Laptop is connected to it.
Bently Nevada 3500 Power Supply
Posted by djafer on 8 November, 2016 - 5:50 am
Looking for additional power supply
4
replies
MarkV Historian
Posted by Rajesh on 8 November, 2016 - 3:34 am
Historian is connected with 8 Gas Turbines and running with out of memory
3
replies
Liquid Fuel System Articles
Posted by Aptx4869 on 7 November, 2016 - 10:08 am
Articles about that water cooled check valve or 3 way-valve would increase the readability of LF System.
4
replies
MODBUS - RTU Implementation Using AVR ATMEGA32A Controllers and RS485
Posted by Kshitij_Lakhani on 7 November, 2016 - 6:05 am
Simple MODBUS - RTU implementation using AVR ATMEGA32A controllers and RS485 as the electrical layer.
1
reply
BLDC Control Board
Posted by Dinesh on 7 November, 2016 - 1:37 am
Looking for recommendations for an evaluation board for a BLDC hub motor.
6
replies
Lube Oil Pump
Posted by Aptx4869 on 5 November, 2016 - 12:55 pm
Both Lube Oil Pumps running at the same time
PV800 HMI Multiple Position Switch
Posted by willsted on 4 November, 2016 - 4:55 pm
Batch tank system, Is it possible to make a six position selector switch with a HMI? I am using a AB Panel-View 800
4
replies
Endress and Hauser Promag 53 Network Failure
Posted by Maclaughlin on 3 November, 2016 - 3:16 pm
Trying to figure out why FITs lose network communication at times.
Scheidt & Bachmann V11 Pump Communication Protocol
Posted by kovacevicdr on 3 November, 2016 - 8:13 am
Trying to connect Scheidt & Bachmann fuel dispenser to computer
4
replies
GE HMI OS - Windows 10 availability
Posted by 10_ac on 3 November, 2016 - 8:12 am
Is the Windows 10 OS available for GE HMI application Toolbox for MKVIe?
3
replies
Setting VTUR Circuit Braker Adaptive Close Time
Posted by topcat123 on 3 November, 2016 - 4:38 am
Setting for CB1CloseTime and adaptive time on MK6E VTUR
2
replies
GE Diagnostic Alarms
Posted by modulusyoung on 2 November, 2016 - 5:41 pm
How to disable GE Diagnostic Alarms from being broadcast in the WorkstationST environment?
2
replies
Modbus Library in MATLAB
Posted by reza_Hdr on 2 November, 2016 - 2:44 pm
Want to communicate between controller and MATLAB via Ethernet cable using Modbus over Ethernet
6
replies
Python Based HMI
Posted by Navigator on 2 November, 2016 - 9:54 am
Looking for reference on Python based port communication/HMI
2
replies
Shaft Grounding for Steam Turbine
Posted by PSMoudgalya on 2 November, 2016 - 6:57 am
What should be grounded on a condensing turbine?
1
reply
Circuit Protection for a Pump
Posted by revamp on 2 November, 2016 - 6:15 am
How to size circuit protection for a pump
5
replies
Modbus Errors in HVAC System - Invalid CRC and Response Not from Requested Slave
Posted by sx3 on 2 November, 2016 - 5:03 am
Modbus errors after connecting heat pump to HVAC, Invalid CRC, Operation times out, Response not from requested slave.
8
replies
MKVIe IO Pack Failures
Posted by Chutney on 1 November, 2016 - 10:09 pm
MKVIe IO Pack Failures and "Module Required" meaning.
1
reply
Absolute Encoder SSI Interface and Grey Code
Posted by Warnakula on 1 November, 2016 - 1:22 pm
How does an absolute encoder works with the SSI interface and what is grey code all about?
FastTrak PLC Programming Software
Posted by geoffrybrown on 1 November, 2016 - 12:18 pm
What are your FastTrak PLC programming software experiences?
Saia PCD - Saia Burgess Controls
Posted by Ulvis on 1 November, 2016 - 8:06 am
Anyone using Saia-PCD PLCs?
2
replies
Gas Orifice Plate Resizing
Posted by chillwin on 1 November, 2016 - 6:31 am
Changing gas orifice plate sizing
GE Workstation ST OPC AE Server
Posted by modulusyoung on 31 October, 2016 - 6:45 pm
Does anyone has experience with GE WorkstationST OPC AE server?
Unity Pro Loop Drawings
Posted by apps_man on 31 October, 2016 - 6:41 pm
Printing a module edge loop wiring drawing from Unity Pro.
3
replies
Gas Turbine Inlet - Turbine Inlet Temperature
Posted by ABDELAALI on 31 October, 2016 - 4:26 pm
How to calculate turbine inlet temperature and what parameters control the evolution of this temperature?
6
replies
Rockwell PLC PID Setpoint Ramp
Posted by old guy on 31 October, 2016 - 9:19 am
Rockwell PLC PID setpoint ramp question
Gas Turbine Inlet Pressure Loss and Exhaust Pressure Loss
Posted by GTguy99 on 31 October, 2016 - 7:59 am
Why is total pressure loss used for Inlet Pressure Loss and static pressure loss used for Exhaust Pressure Loss?
7
replies
Vacuum at Bearing Housing
Posted by Aptx4869 on 30 October, 2016 - 9:23 am
Purpose behind keeping the bearing housing at vacuum
4
replies
How PLC Communicates with DCS
Posted by Mans92 on 30 October, 2016 - 3:58 am
How does a PLC relate to the DCS
1
reply
Retro-fitable Noninvasive Flow Meter for Measuring Pressurised Water
Posted by billythepipe on 30 October, 2016 - 3:01 am
Want to put some inexpensive non-invasive sensors to measure pressurized water flow rate in 1/2" pipes.
2
replies
Automation Deliverables
Posted by Mans92 on 29 October, 2016 - 7:27 am
Main Automation deliverables
7
replies
Will a VFD Output Single Phase?
Posted by Mays on 28 October, 2016 - 5:04 pm
VFD outputting single phase
4
replies
RSView32 and SQL
Posted by Quantum866 on 28 October, 2016 - 9:10 am
How to Read a SQL Table into RSView32 Tags
2
replies
Mark V HMI No Data
Posted by EngHarthi on 27 October, 2016 - 8:05 pm
One of Mark V HMIs shows no data. However, Data can be seen from other HMIs.
Webserver Communication ABB RTU560 CMR01
Posted by hijashmk on 27 October, 2016 - 8:52 am
Unable to setup webserver communication for ABB RTU560 CMR01
Document That Describes IEEE Different Earthing Standard?
Posted by bhushan_javle04 on 27 October, 2016 - 3:43 am
Which IEEE earthing standard can be called when safety and instruments are connected at one end to the panel?
1
reply
Siemens S7-400 Does Not Power On
Posted by Abdul Mateen on 27 October, 2016 - 1:25 am
Siemens S7-400 would not power on after communication error.
1
reply
GE 9FA Gas Turbine Fan When Running Standby Fan Getting Reverse Rotation
Posted by amanat on 26 October, 2016 - 2:21 pm
Gas turbine fans when running standby fan getting reverse rotation which is leading to burnt motor
1
reply
Honeywell Experion SCADA vs PCDI Communication
Posted by thomasicsc on 26 October, 2016 - 11:22 am
Using PCDI vs SCADA in Honeywell Experion with Modbus TCP
Request for Guidance - Single Integrator Issues
Posted by Jeremy Pollard on 25 October, 2016 - 11:41 pm
Single integrator looking for advice on how to explain the value of an informed resource to a VP.
Delta PLC Communication Issue
Posted by Madhumati on 25 October, 2016 - 7:35 am
Facing communication issue with Delta DVP 28SV PLC when powered OFF & ON.
Errors in Logic When Replacing Omron CPU
Posted by Ali Raza on 25 October, 2016 - 6:02 am
Logic errors after replacing Omron CQM1 CPU 21 with CQMH1 CPU 21
Percent of Volatile Matter Left After Burning LPG
Posted by Kamaraj on 25 October, 2016 - 3:22 am
How much amount of LPG can be released to atmosphere, and after burning of LPG how much % of volatile matters can be released to atmosphere via chimney?
PL7 Xway Connection Lost after Second TSXETY4103 Added
Posted by vincentocn82 on 25 October, 2016 - 12:30 am
Premium PLC remote xway connection lost after added second ETY module
2
replies
Drum Three Element Level Control
Posted by shamsedin on 24 October, 2016 - 7:42 am
what is merits and demerits of three element drum level control?
Centum VP Illegal Exit
Posted by Boscokk on 24 October, 2016 - 4:17 am
Illegal Exit Code after installing Centum VP R6
Under Voltage Setting
Posted by Meto on 23 October, 2016 - 2:55 am
What is a rule of thumb setting for the busbar under-voltage relay time delay.
1
reply
Gas Flowrate and Volume Measurement
Posted by dannys on 22 October, 2016 - 4:05 pm
Disparity in volume of gas captured by barton chart recorder from a gas vending company and ABB totalizer used the gas fired power station.
2
replies
Siemens T-3000 Reports Question
Posted by PEHE on 22 October, 2016 - 9:50 am
We're struggling with using T-3000 and creating useful reports.
2
replies
GE Mark VI PID
Posted by Mully on 22 October, 2016 - 6:04 am
Looking for information about the tuning parameters for a oil cooler control loop. It is being controlled by an ISA_PID MK-VI block.
2
replies
52G Re-Closure Logic
Posted by saurabhstalone on 22 October, 2016 - 4:49 am
Understanding the 52G automatic re-closure logic in MKV GE Frames gas turbines controls
6
replies
Stator RTD Showing High Value During Running
Posted by Anurag Bhardwaj on 22 October, 2016 - 12:06 am
Ohm Stator RTD values for motor vary.
3
replies
PWM 4 to 20 mA Signal To Go To PLC
Posted by dpm123 on 21 October, 2016 - 11:36 am
Connecting a sensor outputting 4-20mA PWM signal to an existing PLC that can only accept analogue 0-10V or 4-20mA signals and/or digital inputs
12
replies
2-Wire Network Recommendations
Posted by nuatn on 21 October, 2016 - 10:38 am
Asking for recommendation for a networking framework that uses existing unshielded twisted pair.
1
reply
Monitoring and Controlling Central Air Conditioners
Posted by nabilnathir on 20 October, 2016 - 6:56 am
Questions about setting up automation project for central air-conditioning system
3
replies
Allen Bradley PLC as Ethernet/IP Adapter
Posted by Madhumati on 20 October, 2016 - 6:14 am
Can Allen Bradley PLC be configured as Ethernet/IP slave or adapter?
1
reply
Gas Turbine Tripped on Rotor Axia Shifting but Parameter Normal
Posted by CCPP Guddu on 20 October, 2016 - 1:04 am
Siemens unit 136 MW Gas turbine V 94.2 running on base load and suddenly tripped on "Axial shifting Tripped". Parameters normal and under limit.
New to PLC
Posted by sneha on 19 October, 2016 - 2:43 pm
New to plc would like more information about addressing in PLCs
1
reply
Sea Water Intake
Posted by Djafer on 19 October, 2016 - 6:19 am
Measuring differential level of sea water on transmitter band screen
Automated Packing of Little Bags
Posted by croautomation on 19 October, 2016 - 2:09 am
Project is to solve automation of packing little "pieces" which are collected in big box.
3
replies
Problem with Allen Bradley 5/40 CPU
Posted by Mihir Ramkrishna on 18 October, 2016 - 11:57 pm
After maintenance, an different version of program was in processor after powering up PLC.
1
reply
Electronic Pressure Sensors
Posted by hany5757 on 18 October, 2016 - 12:27 pm
Different electronic sensors used recently for pressure transmitters. Any comparison for the advantage and most important the disadvantages (limitations) for each type?
5
replies
Steam Turbine Operated in Pressure/Power Control Mode
Posted by ThirstyMonkey on 17 October, 2016 - 5:45 pm
What are pros/cons when a steam turbine operates in pressure control mode and in power control mode?
DCS Modbus with Mark Vie
Posted by samehsabry2010 on 17 October, 2016 - 5:33 pm
Creating redundant communication using Modbus and Yokogawa DCS with HMI Mark Vie
17
replies
Turbine Not Attaining FSNL
Posted by Obiloko4 on 17 October, 2016 - 4:00 pm
Turbine fails to reach FSNL. It has been a long time since starting turbine.
1
reply
Ex ia Low Voltage Power Supply
Posted by Andrew H on 17 October, 2016 - 10:54 am
Looking for an [Ex ia] DC power supply with entity parameters; 4V < Uo > 8.4V; Io <= 200mA; Po <= 1.3W
DB-II scale to PC through USB
Posted by delwar on 17 October, 2016 - 12:33 am
Connecting DB-II Scale to PC though USB port
1
reply
PID Configuration of Minimum Flow Controller for Centrifugal Pump
Posted by hany5757 on 16 October, 2016 - 10:35 am
For Centrifugal Pump PID minimum flow controller, is there a special way of configuring it different from normal PID flow controller??
2
replies
Synchronous Motor/Generator
Posted by Terence Sundgren on 14 October, 2016 - 11:31 am
Is it possible to use a synchronous generator in "motoring" mode to synchronize your power machine to the grid, and then start generating by putting power into your machine?
3
replies
Requirements for Sil 3 System
Posted by wilebinabbas on 14 October, 2016 - 6:48 am
Questions about SIL 3 system requirements
3
replies
Mark VI VME CPU Card
Posted by Godswill on 14 October, 2016 - 5:58 am
Looking for the possible price range of Mark VI VME CPU Card
3
replies
Modbus Discrete Input
Posted by choi on 14 October, 2016 - 4:42 am
Confusion about using Modbus to read the status of discrete inputs
1
reply
Power Plant Blackout After Load is Rejected
Posted by Maaz Naseer on 13 October, 2016 - 3:28 pm
Power Plant blackedout when a load of 35MW was rejected. How to keep the system stable after that and prevent blackout?
Honeywell Experion R430.1 SCADA Questions
Posted by ar_basell on 13 October, 2016 - 7:29 am
Using Honeywell R430.1 Scada and have some Quickbuilder questions
4
replies
Adding an Ethernet/IP Adapter to Micrologix 1400 PLC
Posted by Madhumati on 13 October, 2016 - 3:37 am
Looking for a procedure to add an Ethernet/IP adapter device to Micrologix 1400 PLC configuration
1
reply
Controlling a Stepper Motor
Posted by Gabriel on 12 October, 2016 - 9:12 pm
Controlling a stepper motor using variables, but am losing power when it starts moving
1
reply
Position Control w. PLC and VFD
Posted by MRTNTW on 12 October, 2016 - 11:12 am
Position control using sensorless vector techniques.
3
replies
Machine Tripping on Negative Reactive Power Flow
Posted by rak11226 on 12 October, 2016 - 4:51 am
The in house machine which is a 34.5 MW Gas turbine tripped on negative reactive power flow while conducting the load throw off test.