Posts from...
Today, Wednesday, August 20, 2014
Topic: Sensor technologies.
from the Need to find a sensor department...
Lightning Sensor
Posted by Andrew on 19 August, 2014 - 7:18 pm
I'm trying to find a lightning sensor
Topic: Power generation equipment control.
from the Operations department...
Load Commutated Inverter and Generator Neutral
Posted by Vinu on 19 August, 2014 - 5:43 pm
Difference in GE & SIEMENS Load Commutated Inverters.
Topic: PLCs and related questions.
from the Forum department...
Accessing Real Time in GE FANUC PLC
Originally posted by kk on 19 August, 2014 - 6:12 am
How to get real time in GE FANUC VERSAMAX PLC for a calculation.
New Replies:
This link should provide sample logic for a 90-30, however, it should be the same for Versamax...
Originally posted by Bill Futch on 12 August, 2014 - 4:08 pm
Starting motor does not cutout when a normal shutdown is given below 60% speed.
New Replies:
Bill, I am working on a reply to your post. Sounds like an interesting site, can't imagine...
One correction, when the turbine speed was holding 30% and the starting motor didn't drop out, the...
Thank you all for your replies. I apologize for this long post but I have a lot to talk about. ...
Topic: Power generation equipment control.
from the Mechanical department...
Gas Turbine Gearbox Bearing Damage
Originally posted by Izhar on 6 August, 2014 - 12:53 pm
Possible causes for gas turbine gearbox bearing damage
New Replies:
Hello Toral I have taken some of the readings. I am surprised. Please see the below response. I...
Topic: Application Questions and Problems
from the Instrumentation and Control department...
Replacing a Ball Valve with a Different Control Valve
Originally posted by Kamaraj on 19 August, 2014 - 5:47 am
how can we replace mechanically ball valve into electric or pneumatic valve?
New Replies:
few possibilities, you need to replace the valve, or at least contact the manufacturer of the...
Posted by ioudas on 19 August, 2014 - 1:16 pm
Trying to connect a bm85 to a 984 265. Via MODBUS+
Topic: Continuous process industries, DCS questions.
from the Forum department...
Control Valve Position Command Signal
Originally posted by Gary on 11 August, 2014 - 2:28 pm
Looking for a device that generate control valve position signal for open loop control
New Replies:
the correct terminology is Remote/Local for the Setpoint Adjustments Auto/Man for automatic...
I think Roy got it - manual station. I thought almost any PID controller had an auto/manual or...
I believe you are looking for a Manual Loading Station, I haven't seen one for years. If you are...
just put your controller in manual and adjust the output > I need to manipulate a control...
This post of mine is not related to my other post about the integrating actuator TM-55. Sorry for...
Topic: Communications systems and equipment.
from the Forum department...
Modbus Register Address
Originally posted by Whitepage on 15 August, 2014 - 4:30 am
I have a question about entering the register address in our program PME when I have a 4-digit address.
New Replies:
If you are attempting to pair a master that won't allow configuration of offsets >9999 to a...
Dear Fred , Thanks for your advice. But now i don't know what i have to do for this...
Dear Darrin, Thanks for your reply Can you help to show me the way i can change the modbus...
Yes Fred is correct in the breakdown of the "region" (4=holding register) vs. the offset...
Topic: Power generation equipment control.
from the CONTROLS department...
Increase External Load Mode of Turbine
Posted by BOB on 19 August, 2014 - 8:23 am
How can we increase initial load of GT (GE 9FA) after startup while being in external load?
Topic: Continuous process industries, DCS questions.
from the Operation department...
Lube oil temperature and bearing vibration
Originally posted by lock_out on 12 June, 2007 - 10:33 pm
Is there any correlation between lube oil temperature and bearing vibration?
New Replies:
Check if you changed the OIL PUMP (attached to the turbine axis) during your last shut down. If you...
Topic: Power generation equipment control.
from the Forum department...
Air filter DP v/s Air Flow
Originally posted by Sadashiv Bhise on 18 August, 2014 - 8:12 am
On rainy days Gas turbine unit load drops from 108 MW to 70 MW, reduction in air flow although there no increase in DP across Air filter.
New Replies:
> seems problem with air intake filter DP measurements. is it showing correct reading? It is...
seems problem with air intake filter DP measurements. is it showing correct reading?...
Topic: PLCs and related questions.
from the Instrumentation department...
Local Fault on SLC 500
Originally posted by casualguy on 18 August, 2014 - 3:28 am
Local fault indication on our SLC 500
New Replies:
In my experience, Flex I/O doesn't seem very mechanically robust, especially the little plugs...
have you checked to see if the power supply feeding the set of flex modules is large enough for all...
Topic: Power generation equipment control.
from the Forum department...
PX_VIB_GAIN in Mark V
Originally posted by anonymous on 12 May, 2009 - 12:16 am
how PX_VIB_GAIN in mark V works?
New Replies:
Perhaps GE has set the gain to vary with shaft rotative speed to create a sort-of parametric...
Originally posted by Harvard on 15 August, 2014 - 1:17 pm
Need to know how a slave device that lacks access to the RS-485 COMMON manage to maintain a Receiver common mode voltage between -7 and +12.
New Replies:
This would still be a chicken and egg issue. If this Slave has a valid receive then it would...
By Lynn August Linse on 18 August, 2014 - 10:17 am -
I guess one work around would be - if you have the common wire available in the bus cable - is use...
No, it keeps the bus from drifting off when neither is transmitting. My thought is that the bus is...
I too gave consideration to the external fail safe biasing as being a ways and means of trapping...
It's possible that the slave device is broke. That is, the common terminal is unintentionally open....
Thank you for the responses and no this is not a trick question. I am dealing with a...
Common mode voltage can be construed as the average of the differential signals, the more apt...
It can't. It may work, it may not....but you're basically playing with fire. We come across many...
By Lynn August Linse on 15 August, 2014 - 2:29 pm -
A trick question? It of course cannot, and it risks damage, although the most common symptom is...
Posted by Jolek on 18 August, 2014 - 1:36 pm
Turbine MKVIe controllers not reaching online state
Topic: Power generation equipment control.
from the Mechanical department...
Atomizing air cooler modification
Originally posted by Izhar on 9 August, 2014 - 3:29 am
Atomizing Air Cooler Modification
New Replies:
> Power Saved in kWhr = (Main AA Comp Power rating in kWhr)*(Turbine running hours) > This...
Posted by JW on 18 August, 2014 - 10:03 am
Development and transfer of logic on RSLogix to PLC via DNP3
Originally posted by ASCF on 4 March, 2014 - 4:08 am
I try to connect a Power Circuit breaker from Schneider to a Siemens PLC using Modbus RTU protocol.
New Replies:
Hi! Do you have some solution on your problem. I see we have the same HW and the same problem,...
Posted by banny on 18 August, 2014 - 4:45 am
How earth the collocated shelter that feed from one generator and spaced far apart?
Posted by . on 18 August, 2014 - 4:41 am
What is the position for Mark 4 HSAA card jumper when we want to perform calibration?
Topic: Power generation equipment control.
from the Low frequency operation of STG department...
Steam TG Low Frequency Operation in Island Mode
Originally posted by Storm Rider on 15 August, 2014 - 4:35 pm
Can I generate more power using low frequency operation of STG?
New Replies:
Storm Rider, It's not possible to run a turbine-generator set in parallel with...
Originally posted by faisal on 17 August, 2014 - 5:40 am
During start up combined cycle, GE 9E mark VI gas turbine tripped.
New Replies:
Faisal, Alarms occur in a sequential chronological order. That means that a list of alarms is...
Topic: Power generation equipment control.
from the Process Control department...
PQM II Setup for Generator
Originally posted by Chris IWO on 14 August, 2014 - 5:28 pm
Configuring a GE PMQ II for metering the power readings. Can anyone help with the specification I need to enter into the PQM?
New Replies:
Thanks CSA > I just had a quick look at the PQM II manual (GEK-106435P)--and it's pretty ...
Topic: Power generation equipment control.
from the operations department...
Loss of Cooling Water to Steam Turbine Condenser
Originally posted by sriram sandep on 12 August, 2014 - 7:13 pm
What will happen in special circumstances when there is a loss of Cooling water supply to the condenser
New Replies:
In addition to this reply, there is chance of breaking of condenser rupture disc if both CW pumps...
Topic: Power generation equipment control.
from the Mechanical department...
Frame 9E Gas Turbine
Originally posted by Izhar on 7 July, 2014 - 11:52 am
Frame 9E gas tubine impulse/reaction stages and special coating on compressor stages.
New Replies:
Hello There, Compressor Section Stage 0-1 C450 compressor bladeing (carpenter custom 450)...
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Understanding Run Back in Burner Management System
Posted by fluidflow on 16 August, 2014 - 11:13 am
What is Run Back in a Boiler Operation?
Originally posted by MPAC on 15 August, 2014 - 1:29 pm
What is the difference between a Mark V type 'A' and a type 'B' Panel? Can you tell by looking at it?
New Replies:
MPAC, No; one can't tell from looking at the outside of the panel, or even by opening the doors...
Topic: Communications systems and equipment.
from the modbus community department...
RS-485 cable recommended reference
Originally posted by bammaroc on 13 August, 2014 - 6:33 am
RS-485: Reference recommended cable for Modbus communication between DCS and MVI94-MCM systems or PLC
New Replies:
I have to apologize, Belden doesn't make a bonded pair RS-485 cable, the cat cables would probably...
Posted by Oil & Gas on 15 August, 2014 - 12:11 pm
I need to know how to communicate between telemetering system and PC using cables RS232.

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