Posts from...Today, Wednesday, August 20, 2014
from the Need to find a sensor department...Lightning Sensor
I'm trying to find a lightning sensor
from the Operations department...Load Commutated Inverter and Generator Neutral
Difference in GE & SIEMENS Load Commutated Inverters.
from the Forum department...Accessing Real Time in GE FANUC PLC
How to get real time in GE FANUC VERSAMAX PLC for a calculation.
By Tye Scott on 19 August, 2014 - 4:43 pm -
This link should provide sample logic for a 90-30, however, it should be the same for Versamax...
from the Forum department...GE Frame 7EA Combustion Turbine Starting Motor
Starting motor does not cutout when a normal shutdown is given below 60% speed.
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. ...
from the Mechanical department...Gas Turbine Gearbox Bearing Damage
Possible causes for gas turbine gearbox bearing damage
Hello Toral I have taken some of the readings. I am surprised. Please see the below response. I...
from the Instrumentation and Control department...Replacing a Ball Valve with a Different Control Valve
how can we replace mechanically ball valve into electric or pneumatic valve?
By d on 19 August, 2014 - 1:30 pm -
few possibilities, you need to replace the valve, or at least contact the manufacturer of the...
from the IT department...BM85 connections to a 984 265 Via MODBUS
Trying to connect a bm85 to a 984 265. Via MODBUS+
from the Forum department...Control Valve Position Command Signal
Looking for a device that generate control valve position signal for open loop control
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...
By d on 18 August, 2014 - 3:21 pm -
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...
from the Forum department...Modbus Register Address
I have a question about entering the register address in our program PME when I have a 4-digit address.
By Darrin on 19 August, 2014 - 8:46 am -
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...
By Darrin on 15 August, 2014 - 3:20 pm -
Yes Fred is correct in the breakdown of the "region" (4=holding register) vs. the offset...
from the CONTROLS department...Increase External Load Mode of Turbine
How can we increase initial load of GT (GE 9FA) after startup while being in external load?
from the Operation department...Lube oil temperature and bearing vibration
Is there any correlation between lube oil temperature and bearing vibration?
By Christopher on 19 August, 2014 - 8:19 am -
Check if you changed the OIL PUMP (attached to the turbine axis) during your last shut down. If you...
from the Forum department...Air filter DP v/s Air Flow
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.
By Bhise Sadashiv on 19 August, 2014 - 12:09 am -
> seems problem with air intake filter DP measurements. is it showing correct reading? It is...
By Gtman on 18 August, 2014 - 2:59 pm -
seems problem with air intake filter DP measurements. is it showing correct reading?...
from the Instrumentation department...Local Fault on SLC 500
Local fault indication on our SLC 500
By Steve Myres on 18 August, 2014 - 10:05 pm -
In my experience, Flex I/O doesn't seem very mechanically robust, especially the little plugs...
By Bob Peterson on 18 August, 2014 - 10:31 am -
have you checked to see if the power supply feeding the set of flex modules is large enough for all...
from the Forum department...PX_VIB_GAIN in Mark V
how PX_VIB_GAIN in mark V works?
Perhaps GE has set the gain to vary with shaft rotative speed to create a sort-of parametric...
from the Forum department...Slave Device Lacks Connection to RS-485 Common Connection
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.
By Harvard on 18 August, 2014 - 4:32 pm -
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...
By Curt Wuollet on 17 August, 2014 - 12:17 am -
No, it keeps the bus from drifting off when neither is transmitting. My thought is that the bus is...
By Harvard on 16 August, 2014 - 8:43 pm -
I too gave consideration to the external fail safe biasing as being a ways and means of trapping...
By Curt Wuollet on 16 August, 2014 - 5:45 pm -
It's possible that the slave device is broke. That is, the common terminal is unintentionally open....
By Harvard on 16 August, 2014 - 10:39 am -
Thank you for the responses and no this is not a trick question. I am dealing with a...
By Curt Wuollet on 15 August, 2014 - 8:07 pm -
Common mode voltage can be construed as the average of the differential signals, the more apt...
By Darrin on 15 August, 2014 - 3:10 pm -
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...
from the IEC department...Unable To put MKVIe Controller Back Online
Turbine MKVIe controllers not reaching online state
from the Mechanical department...Atomizing air cooler modification
Atomizing Air Cooler Modification
> Power Saved in kWhr = (Main AA Comp Power rating in kWhr)*(Turbine running hours) > This...
from the Forum department...DNP3 Communication Issue - Transfering Program to MicroLogic PLC Via DNP3
Development and transfer of logic on RSLogix to PLC via DNP3
from the Forum department...Modbus RTU communication between Siemens CP441-2 and Schneider Compact NSX
I try to connect a Power Circuit breaker from Schneider to a Siemens PLC using Modbus RTU protocol.
By htrendafilov on 18 August, 2014 - 7:19 am -
Hi! Do you have some solution on your problem. I see we have the same HW and the same problem,...
from the Forum department...Earthing a Collocated Shelter That Feeds Separate Generators
How earth the collocated shelter that feed from one generator and spaced far apart?
from the Forum department...Mark 4 Speedtronics HSAA Card jumper position for SRV, GCV Calibration
What is the position for Mark 4 HSAA card jumper when we want to perform calibration?
from the Low frequency operation of STG department...Steam TG Low Frequency Operation in Island Mode
Can I generate more power using low frequency operation of STG?
Storm Rider, It's not possible to run a turbine-generator set in parallel with...
from the operation department...MARK VI Out of Service During Start Up of Combined Cycle
During start up combined cycle, GE 9E mark VI gas turbine tripped.
Faisal, Alarms occur in a sequential chronological order. That means that a list of alarms is...
from the Process Control department...PQM II Setup for Generator
Configuring a GE PMQ II for metering the power readings. Can anyone help with the specification I need to enter into the PQM?
Thanks CSA > I just had a quick look at the PQM II manual (GEK-106435P)--and it's pretty ...
from the operations department...Loss of Cooling Water to Steam Turbine Condenser
What will happen in special circumstances when there is a loss of Cooling water supply to the condenser
By Gtman on 17 August, 2014 - 2:06 am -
In addition to this reply, there is chance of breaking of condenser rupture disc if both CW pumps...
from the Mechanical department...Frame 9E Gas Turbine
Frame 9E gas tubine impulse/reaction stages and special coating on compressor stages.
By fluidflow on 16 August, 2014 - 11:55 am -
Hello There, Compressor Section Stage 0-1 C450 compressor bladeing (carpenter custom 450)...
from the Instrumentation and Control department...Understanding Run Back in Burner Management System
What is Run Back in a Boiler Operation?
from the Forum department...Difference Between Mark V Type 'A' or 'B' Panel
What is the difference between a Mark V type 'A' and a type 'B' Panel? Can you tell by looking at it?
MPAC, No; one can't tell from looking at the outside of the panel, or even by opening the doors...
from the modbus community department...RS-485 cable recommended reference
RS-485: Reference recommended cable for Modbus communication between DCS and MVI94-MCM systems or PLC
By cww on 15 August, 2014 - 2:28 pm -
I have to apologize, Belden doesn't make a bonded pair RS-485 cable, the cat cables would probably...
from the Instrumentation department...Communication Between Telemetry System P6008/9 and Computer
I need to know how to communicate between telemetering system and PC using cables RS232.
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-- Groucho Marx
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