Search results

Mauricio Marquez, As much as I HATE to agree with ControlsGuy25 (and I do!), this topic (of dual fuel (gas/distillate, or gas/liquid) operation, especially when distillate/liquid fuel has not been used for a long time) has been covered MANY times before on Control.com. MANY times. All past...

Direct Digital Controls - for HVAC control. Thanks, Bertus!

Please--what is DDC?

Raf80, You should only copy the files that changed.

GToperator/Pat, I don't have access to the Mark IV Maintenance Manual at this writing, and I don't immediately recall ever seeing the ”negative” sign under a contact--a highlighted or un-highlighted contact. When a contact is highlighted, it means that ”power” can pass through the contact. The...

Makster Thanks for keeping us up to date on the situation. It is much appreciated!!!

Raf80, Hmmm..... When calibrating LVDTs (one DOES NOT calibrate the SRV or GCV (or IGVs)--one ONLY calibrates the LVDT feedback from devices equipped with LVDTs), there should typically be only two (2) files which change in the unit-specific directory: ACALIB.DAT and IOCFG_Q.DAT (for an <I>) or...

makster, Ahhh, now I understand the preoccupation with Diagnostic Alarms. I have pulled several "new" spares out of the warehouse/stores only to find they don't work properly. Mark VI is not a young control system (it's not that old either). BUT, the biggest problem I encounter when pulling...

bijumkk There were three documents which were provided with every Mark II: The Control Specification, System Setting; the Control Specification, System Adjustments; and, the Control Specification, Operating Sequences (or something similar). The second of the two above usually contained LVDT...

Makster, Methinks you are reading too much (i.e., overthinking) the situation with the TREG and TPRO card communication with the VPRO. Some Diagnostic Alarms are less meaningful than others; in my personal opinion, these Diagnostic Alarms fall firmly in that category. The ETR relays are on the...

Have you tried: 1) Exchanging the non-working RTD for another working RTD on the monitoring system? If so, what were the results? (If the problem "follows" the intermittent RTD to a new channel/input on the monitoring device, then there's something wrong with the interconnecting wiring, and/or...

cheedee, Thank you for the feedback!

jagadeesh_73680, Use the P&IDs to go through the Hydraulic System systematically. That's always the thing to do in cases like this. At the hydraulic "block" where the relief valves and air-bleed check valves are located if the relief valves are relieving there is usually a very large flow of...

remonroy, That ”coaxial cable” is the IONET and it's how the VPROs talk to the UCVx, through the VCMI. 10Base2 Ethernet requires Ethernet termination resistors at both ends of a segment of cable. Is the IONET configuration not described/diagrammed in GEH-6421? What kind of testing do you...

Ahmedetrby, Depending on the age of the unit you are referring to, GE Belfort has control over the design and control philosophies of GE-design Frame 9 (E/F) heavy duty gas turbines, and it's likely your question would be best directed to them. No one really knows why GE Belfort does some...

cheedee, Thank you for the update. We look forward to hearing more. I am presuming this is the "new" Mark VI.?.?.? If so, I would like to know if this alarm has persisted since the "new" Mark VI was powered-up or if it just started recently, and if it just started recently was it after I/O was...

eng.hydarkazem, Look for GEI-100620.pdf on the HMI; it's the 'WorkstationST Alarm Viewer Instruction Guide.' It has LOTS of pictures and some good information you might be able to use to get WorkstationST Alarm Viewer (re-)set up and configured properly. (And, again, all of my responses presume...

Ahmedetrby, What is prompting you to ask this question? Is there some condition or operational problem that has you asking why there is no secondary gas manifold purge? In my personal opinion, gas fuel purging is necessary when there is a high risk of hot combustion gases flowing into fuel...

eng.hydarkazem, Alarms from a Mark VIe are displayed using WorkstationST Alarm Viewer. WorkstationST Alarm Viewer has many, Many, MANY possible display filters and various configurations that can, if improperly set or configured can result in no alarms being displayed in the viewer even though...

Hamada ramadan, We are not there beside you, and I don't want to be guessing at what you want or are trying to ask. A LOT of people (engineers and plant managers, in particular) have this (false) idea that two (or more) turbines sitting next to each other on the same site will most always have...