Posts from...
Today, Saturday, August 2, 2014
Topic: Local and wide area networking in factory automation.
from the The Banging Head Against Wall Department department...
RS485 Issues - Modbus Temperature Controller to Ethernet
Posted by Plutonius on 1 August, 2014 - 9:08 pm
I am currently have a bit of an issue connecting to a Love 2600 temperature controller via RS485 full duplex with a Grid Connect NET485 Modbus RTU to TCP ethernet bridge.
Originally posted by humble3 on 1 August, 2014 - 6:45 am
Our mist eliminator is bringing out heavy mist which then condensate back to oil - causing serious oil shortage
New Replies:
fluidflow, When a situation like this comes up on a unit which has been running properly in the...
Hello there, The job of mist eliminator is to maintain a slight negative pressure on the lube...
Topic: Power generation equipment control.
from the POWER GENERATION department...
Testing spark plugs of mark5 control system
Originally posted by SHYAM on 21 December, 2013 - 1:00 pm
What are the logic signals required to force, for testing purposes the spark plugs of frame5 Gas turbine externally when mark5 control system is in shut down condition?
New Replies:
be_anon, Thanks for the information! So, the diagnostic circuit operates...
Batman, I have a better thread (not forum--control.com is the forum, which has individual...
> I don't think we know when 30SG-1 changes state, actually. This may help, from the manual. ...
> Can you provide a link to the comment so I can build on the information for the explanation? ...
Batman, Can you provide a link to the comment so I can build on the information for the...
CSA, I have not faced any problem with this alarm, but when I was going through the start up...
Batman, I don't think we know when 30SG-1 changes state, actually. We don't know if it changes...
CSA, I am really amazed by your sheer persistence to offer help to the needy. And after spending...
Batman, 30SG-1 "drives" l30sg1. You should think of it like this:
    ...
CSA, Thank you for the quick reply. I was under the impression that, a) 30SG-1 & l30sg1...
Topic: Power generation equipment control.
from the serious department...
charge accumulator
Originally posted by Kene on 23 October, 2011 - 1:17 pm
charge accumulator method
New Replies:
Is this accumulator a piston or bladder design? even with both designs, If they have not be...
MJ, You can't go wrong with JFB's advice and procedure. We are basically in agreement: the...
Thanks CSA, We have checked in Device Summery & PID drawings, But the pre-charged pressure...
Topic: Power generation equipment control.
from the Mechanical department...
Exit Guide vanes of Gas Turbines
Originally posted by Izhar on 19 July, 2014 - 4:24 pm
Gas turbine exit guide vanes and how to use them
New Replies:
Dear Izhar, I regret to respond after such a long pause. I was busy with some mundane...
Topic: Power generation equipment control.
from the Forum department...
GSM Protocol and MARK VI
Originally posted by Ahmed samy on 27 April, 2014 - 7:08 am
GSM connection between mark VI and Ovation
New Replies:
Did you get? Do you need something else about this communication (GSM)?...
Topic: Engineering and workplace issues.
from the Instrument department...
2 Wire Loop Powered Transmitter
Posted by Lc1 on 1 August, 2014 - 11:38 am
Powering a 2 wire loop powered transmitter
Topic: Application Questions and Problems
from the Federal Pacific Electric Co heater department...
Controling an 8Kw electric heater
Posted by Ken on 1 August, 2014 - 10:19 am
Bought old never used 8Kw ceiling mount electric heater, trying to figure wiring.
Originally posted by any author on 31 July, 2014 - 3:40 am
Gas Turbine power station has tripped on surge protection many times due to grid frequencies variation from 50Hz to 49.2Hz.
New Replies:
> The first question is: > What does the OEM (Original Equipment Manufacturer: Ansaldo) say...
any author, The first question is: What does the OEM (Original Equipment Manufacturer:...
Topic: PLCs and related questions.
from the Please Help department...
Send And Recieve data between To S7-1200 Plc's
Posted by Donovan on 1 August, 2014 - 3:15 am
Need Help on how to transfer data between two S7-1200 Plc's
Posted by sreekanth on 1 August, 2014 - 12:55 am
The GT frame 6b and the control system is MARK VI TMR unit was tripped from the HVAC short circuit.
Topic: Communications systems and equipment.
from the software department...
Read/Write serial port using php
Originally posted by vasudevan on 31 July, 2014 - 6:22 am
Read/Write from windows serial port using php
New Replies:
That's perfectly understandable if it's the same port. The writing program locks it (exclusive...
Topic: Motion control, servos, steppers, etc.
from the Siemens/Schneider/Beckhoff or other?! department...
New to the motion world
Originally posted by raph_rf on 29 July, 2014 - 12:04 am
Hello I have a new project with 11 axes of motion (Servos) and need advice on one of three options.
New Replies:
By James Ingraham on 31 July, 2014 - 4:48 pm -
From a technical standpoint, I don't think there's anything wrong with the three choices you've...
Topic: PLCs and related questions.
from the Automation List department...
Need a siemens expert
Posted by Curt Wuollet on 31 July, 2014 - 4:33 pm
Can I replace a toasted analog module on a S7-224 without having the program?
Topic: Power generation equipment control.
from the engineering department...
Mark VIe logic block
Originally posted by N.V.Q on 28 July, 2014 - 10:43 pm
Time_Sec block in Mark VIe system.
New Replies:
N.V.Q, Here's a logic diagram for the TIMER_SEC block which might help:
        1    ...
N.V.Q, PULSE block. No Block Help for this block either, eh? Very bad GE. ...
N.V.Q, I refer you to the first response: "When the log_in (logic input) is true (logic...
Dear Sir CSA. One more block of Mark VI need your help. The block name is PLUSE, with two...
Thank you very much for your answer. This is basic block, using many where so understand it is...
Topic: Engineering and workplace issues.
from the control systems department...
Orifice Tapping Point
Originally posted by amanemisa on 31 July, 2014 - 4:35 am
Orifice tapping point for additional DP flow transmitter
New Replies:
Depends on the criticality of your emergency criteria. Most operating plants typically require...
Topic: Engineering and workplace issues.
from the electrical, domotics department...
modbus-scada
Originally posted by Remi Van Damme on 2 July, 2014 - 1:15 am
is it possible in a modbus network to have a SCADA system which polls for data from the slaves and another SCADA system which also collects data from the same slaves?
New Replies:
We have 2 solutions for your application. In order to avoid having 2 masters in your PC, you will...
Originally posted by Vishal on 1 August, 2007 - 10:12 am
I have a system which transmits signals in RS 232C format. There is a CONTROL System, which accepts signals in RS485 Modbus Format.

Please share you thoughts as to what needs to be done to interface these to systems.
New Replies:
For a complete solution, you can use our Modbus RTU Utility to read the data using our RS-232 to...
there are lots of vendors who give rs 2323 to 485 convertors. i use MOXA convertor which is a basic...
An old PC and some software will do that. But if it's converting from Modbus ASCII to Modbus RTU...
Topic: Engineering and workplace issues.
from the Instrumentation and Control department...
Control Valve Questions
Originally posted by Anil Bathra on 30 July, 2014 - 3:49 am
fail safe position of control valve
New Replies:
Thanx Raymond. But how double acting Piston type control valve will work for fail safe position?...
Failsafe with regards to control valves implies either you require your process line to close or...
Topic: Power generation equipment control.
from the Power Generation department...
Getting a better understanding of GT control PART 2
Originally posted by Neo on 11 July, 2014 - 10:48 pm
Getting a better understanding of GT control PART 2.
New Replies:
CSA: L63CSHH and L63ETH trips are not listed in trip Display on the HMIs at my site, so they...
CSA: Glad to receive your reply,and i have been waiting for your reply.I thought you are busy...
CSA, Thanks for the appreciation :) But this is nothing as compared to what you're doing for...
Topic: Engineering and workplace issues.
from the Instrumentation & Control department...
VFD Pump Control
Originally posted by raynvd on 30 July, 2014 - 9:03 am
Is VFD pump control faster than pneumatic valve control
New Replies:
I'd seriously doubt it. The VFD is limited in both the speed with which it can increase flow...
Topic: Software, including programming, OS issues, etc.
from the Instrumentation and control department...
Teleperm ME function block
Originally posted by Raymond Mpofu on 16 June, 2014 - 4:44 pm
Meaning of the 'HUPE' Teleperm ME function block in the GET (Graphic Engineering Tool) function diagram
New Replies:
Thanks for the response. In other words, its for audible alarming purposes, but is it only for...
By Alex Olokhtonow on 30 July, 2014 - 8:34 am -
Hello! It's a horn stimulation signal. > Can anyone explain the meaning of the 'HUPE'...
Topic: Power generation equipment control.
from the From Excitation Department department...
EX2000 Fault : ST 717_ _PS AC IN and FL 711_ _MCP SYNC
Originally posted by electricalman on 7 July, 2014 - 3:58 am
We have EX2000 with static exciter type which is installed on our Steam Turbine Generator, made by GE.
New Replies:
In my experience, these two alarms are tied together. The FL711 is sometimes driven by the fact...
> We also have the same error code 717 on our EX2000. We changed the DCFB board > but that...
Topic: Power generation equipment control.
from the Controls department...
GE Gas Turbine IGV angle
Originally posted by BND on 28 June, 2014 - 4:31 am
What is the logic? GTG is not operating in Temperature Control mode.
New Replies:
CSA, Already i checked the diesel engine loaded speed which was 2320 rpm and replace the torque...
Topic: PLCs and related questions.
from the Process Control department...
Genius Bus
Originally posted by Chris IWO on 29 July, 2014 - 2:35 am
Lost of Genius Bus LAN
New Replies:
> What are that likely factors that affect the GE LM 70 30 Genius Bus LAN to drop off? 1....
Topic: Power generation equipment control.
from the Forum department...
Standby AC power supply for power plant
Originally posted by masoud on 28 July, 2014 - 2:36 am
Which is a more reliable AC backup power supply UPS or Inverter?
New Replies:
Switching time is more important after failures of mains supply. so UPS is better solution and...
Topic: Engineering and workplace issues.
from the OPC to CS3000 communication department...
Reading text information from OPC to yokogawa CS3000
Originally posted by ANWESHA on 3 July, 2014 - 4:08 am
Is it possible to read text/string from OPC to CS3000 in some way?
I would like to read a Batch number which is scanned and fed to OPC and display in the graphics of CS3000.
Is that possible?
New Replies:
Hi Anwesha, If your customer uses a data historian (e.g. Exaquantum) you will probably find that...
Topic: Communications systems and equipment.
from the Department of Redundency Department department...
Using OPC to communicate with GE MKVIe
Originally posted by Brian on 4 June, 2014 - 2:31 pm
I'm trying to find out if anyone is using OPC to talk to a GE MKVIe from an ABB INFI90 DCS System.
New Replies:
Some years ago we developed code to directly communicate with GE Mk VI controllers and this runs on...
Topic: Programming languages.
from the Forum department...
KOYO vs ADC memory type
Originally posted by Eric on 29 July, 2014 - 3:50 pm
KOYO and ADC - what do they stand for?
New Replies:
Koyo R = register I assume I, Q = common input & output nomenclature outside the US. M =...
Topic: Power generation equipment control.
from the POWER PLANT department...
IGV for DLN Type Without IBH
Originally posted by ABDI on 24 July, 2014 - 1:56 am
If a turbine has DLN (Dry Low NOx) combustors, IGV exhaust temperature control is not operator-selectable. Is it always on?
New Replies:
Actually, I'm not done with this thread. This issue started back in December of...

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