V
hai
Can any one tell me the procedure to reboot the mark vi controller cards?
Can any one tell me the procedure to reboot the mark vi controller cards?
J
John emery
You can download the procedure at GE ControlsConnect. I am not in the office right now to provide it but if you have not registered for this ge site you can find it by searching on google. All these docs are avail. If you have trouble logging in feel free to email me at [email protected].
hai,
Your question is a little unclear, and we don't know enough about the Mark VI at your site.
Is the Mark VI a TMR or a SIMPLEX turbine control panel?
Does it have a <PD> Power Distribution "core" (module), with a door, and printed circuit card in the back of the core with lots of bat-handle switches and cables and fuses and some LEDs?
Are you trying to power down and re-boot just the control processor(s), or the entire panel?
If you're just trying to re-boot the three processors in a TMR panel will you be re-booting them one at a time?
I doubt if any re-booting instructions at GE Controls Connect would have the detailed information for all of the above scenarios--once you provide the details of what it is you want to do and what kind of control panel you're working on.
Your question is a little unclear, and we don't know enough about the Mark VI at your site.
Is the Mark VI a TMR or a SIMPLEX turbine control panel?
Does it have a <PD> Power Distribution "core" (module), with a door, and printed circuit card in the back of the core with lots of bat-handle switches and cables and fuses and some LEDs?
Are you trying to power down and re-boot just the control processor(s), or the entire panel?
If you're just trying to re-boot the three processors in a TMR panel will you be re-booting them one at a time?
I doubt if any re-booting instructions at GE Controls Connect would have the detailed information for all of the above scenarios--once you provide the details of what it is you want to do and what kind of control panel you're working on.
vijay,
The part that would definitely be missing from any procedure you obtained from GE Controls Connect would be the admonition to open all the auxiliary motor starter mains breakers (including any DC pump motors) before powering down all of the control processors at once or powering down <R> in a SIMPLEX Mark VI. (Actually, in a TMR control panel once you powered down a second processor at the same time any other was powered down, the scenario below would occur!)
GE, particularly for their heavy duty gas turbine applications, use a philosophy they call "drop-out-to-run". This refers to the state of the discrete output relays of the Speedtronic turbine control panel which start/stop auxiliary motor starters (usually including the Emer. L.O. Pump motor).
They connect the NC (Normally Closed) contacts of discrete output relays used to start/stop auxiliary motors to the control circuits of the motor starters. To close the NC contacts, the discrete output relay must be "dropped out", de-energized, false, zero. The contacts must be open to stop the auxiliary motor.
In other words, to start an auxiliary motor the discrete output relay must be de-energized. And to stop that auxiliary motor the discrete output relay must be energized.
This is done because GE primarily use electromechanical relays for discrete output relays for auxiliary motor starters, because the predominant failure mode for the electromechanical relays is to fail in the de-energized state. GE's heavy duty gas turbine control philosophy is that if the relay driving an auxiliary motor should fail (in the de-energized state) the auxiliary motor will start and run when it should not be running, which will be a clue to the operator and maintenance technician that the discrete output relay has failed.
The reverse of this logic is: If the discrete output relay fails (and the predominant failure mode is the de-energized state) and an auxiliary motor (remember, this includes the Emer. L.O. Pump) needs to start and run, if the Speedtronic tries to energize the discrete relay output and it doesn't pick up (because it's failed) the motor will not start and run at all. Better an auxiliary motor start and run when it's not supposed to run than it not start and run when it's not supposed to.
Also, if the discrete relay output is energized to run and it fails or has failed, that fact won't be known until the Speedtronic tries to start and run the motor and it doesn't run. In this case the motor will not start and run when it's supposed to--and if it's a "critical device" then the reliability of the unit could be adversely affected.
So, if the application at your site is a GE-design heavy duty gas turbine, this means that to start a motor the discrete output relay has to be de-energized (dropped out), and to stop a motor the discrete output relay has to be energized (picked up).
That means when the unit is at rest and you are preparing to power down the panel or all of the control processors most of the discrete relay outputs used to start/stop auxiliary motors will be energized by the Speedtronc (presuming the unit is not on cooldown). If you don't open all the auxiliary motor starter mains breakers before powering down the panel or all of the control processors (or the second of three control processors in a TMR panel) then every motor that is driven by a NC discrete output relay contact will start and run--at the same time! Because the discrete output relays that are energized by the Speedtronic when the control processors are controlling outputs will all de-energize at the same time.
I've been at many sites where the auxiliary transformer relay over-current setting was very marginal, meaning that when all the auxiliary motors started and ran at the same time the auxiliary transformer protective relay would trip and the turbine, in some cases the entire plant, would "go black" (lose AC mains power).
So, write your own procedure using any information you might receive from all sources so that you have considered all of the possible effects of what you might be trying to do so that you don't need to "light your torch" (turn on your flashlight) when you are rebooting Mark VI control processor(s). And so that you don't have to explain to the Supervisors and Managers what happened, and why it will never happen again....
Now, if you have re-booted all of the control processors and they are now back at a controlling state with their outputs enabled, and this Mark VI is controlling and protecting a GE-design heavy duty gas turbine you will likely see at least one alarm indicating that the unit is NOT on cooldown (hydraulic ratchet; turning gear; slowroll; whatever the means at your site is called that's used to prevent the compressor rotor from warping when it's hot/warm).
That's because the default mode of the Speedtronic panel when it's powered-up is try to put the unit on cooldown. The Speedtronic doesn't know if the turbine rotor is hot or cold, so it tries to protect the rotor by putting the unit on cooldown--and when there aren't any auxiliary motors running, it can't, hence the alarms.
At this point, you need to go into Toolbox and find the logic signal that will allow you to de-select cooldown control. That signal name is usually L62CD, and it's usually driven by a timer or a combination of a timer and a counter. You will need to force L62CD to a logic "1" to be able to select COOLDOWN OFF from an HMI display.
You will need to unforce L62CD to see if it remains a logic "1" or returns to a logic "0" BEFORE selecting COOLDOWN OFF. Sometimes, forcing it to a logic "1" will latch it to a logic "1"; sometimes it won't. If it stays at logic "1", then you can select COOLDOWN OFF and start closing auxiliary motor mains breakers.
If it returns to a logic "0" when you unforce it, then you are going to have to figure out how to toggle the counter to get L62CD to remain a logic "1" when you unforce it so that you can go select COOLDOWN OFF and then go and close auxiliary motor starter mains breakers. Because, if you can't select COOLDOWN OFF and have the unit remain off cooldown and you close the Aux. L.O. Pump motor starter mains breaker the motor will immediately start! With you standing in front of the starter! (And that's a violation of most safety procedures these days in most parts of the world.) So, you want to make sure COOLDOWN OFF is selected and remains off when you unforce the permissive so that no auxiliary motor starts when you close its motor starter mains breaker. (You'll know that cooldown is off when the process alarm(s) telling you that it's not on can be cleared from the Alarm Window.)
Hope this helps!
Again, I would wager good money the above would be missing from any procedure you might obtain from GE Controls Connect. But, then, I've been wrong before and I will be wrong again in the future, probably the not-too-distant future, either.
And I would like to be wrong about this, too; but, well, odds are against that. GE Controls Connect pretty much focuses on the Speedtronic equipment, and forgets that in the field it's connected to live equipment and a turbine, auxiliaries, and a drive device (generator, compressor, etc.). They might know a lot about the Speedtronic, and how to reboot the control processors, but if you blindly follow any procedure you might get without remembering there are field devices and instruments and motor starters all driven by the Speedtronic you might get a rather large surprise--especially if you aren't carrying your torch!
The part that would definitely be missing from any procedure you obtained from GE Controls Connect would be the admonition to open all the auxiliary motor starter mains breakers (including any DC pump motors) before powering down all of the control processors at once or powering down <R> in a SIMPLEX Mark VI. (Actually, in a TMR control panel once you powered down a second processor at the same time any other was powered down, the scenario below would occur!)
GE, particularly for their heavy duty gas turbine applications, use a philosophy they call "drop-out-to-run". This refers to the state of the discrete output relays of the Speedtronic turbine control panel which start/stop auxiliary motor starters (usually including the Emer. L.O. Pump motor).
They connect the NC (Normally Closed) contacts of discrete output relays used to start/stop auxiliary motors to the control circuits of the motor starters. To close the NC contacts, the discrete output relay must be "dropped out", de-energized, false, zero. The contacts must be open to stop the auxiliary motor.
In other words, to start an auxiliary motor the discrete output relay must be de-energized. And to stop that auxiliary motor the discrete output relay must be energized.
This is done because GE primarily use electromechanical relays for discrete output relays for auxiliary motor starters, because the predominant failure mode for the electromechanical relays is to fail in the de-energized state. GE's heavy duty gas turbine control philosophy is that if the relay driving an auxiliary motor should fail (in the de-energized state) the auxiliary motor will start and run when it should not be running, which will be a clue to the operator and maintenance technician that the discrete output relay has failed.
The reverse of this logic is: If the discrete output relay fails (and the predominant failure mode is the de-energized state) and an auxiliary motor (remember, this includes the Emer. L.O. Pump) needs to start and run, if the Speedtronic tries to energize the discrete relay output and it doesn't pick up (because it's failed) the motor will not start and run at all. Better an auxiliary motor start and run when it's not supposed to run than it not start and run when it's not supposed to.
Also, if the discrete relay output is energized to run and it fails or has failed, that fact won't be known until the Speedtronic tries to start and run the motor and it doesn't run. In this case the motor will not start and run when it's supposed to--and if it's a "critical device" then the reliability of the unit could be adversely affected.
So, if the application at your site is a GE-design heavy duty gas turbine, this means that to start a motor the discrete output relay has to be de-energized (dropped out), and to stop a motor the discrete output relay has to be energized (picked up).
That means when the unit is at rest and you are preparing to power down the panel or all of the control processors most of the discrete relay outputs used to start/stop auxiliary motors will be energized by the Speedtronc (presuming the unit is not on cooldown). If you don't open all the auxiliary motor starter mains breakers before powering down the panel or all of the control processors (or the second of three control processors in a TMR panel) then every motor that is driven by a NC discrete output relay contact will start and run--at the same time! Because the discrete output relays that are energized by the Speedtronic when the control processors are controlling outputs will all de-energize at the same time.
I've been at many sites where the auxiliary transformer relay over-current setting was very marginal, meaning that when all the auxiliary motors started and ran at the same time the auxiliary transformer protective relay would trip and the turbine, in some cases the entire plant, would "go black" (lose AC mains power).
So, write your own procedure using any information you might receive from all sources so that you have considered all of the possible effects of what you might be trying to do so that you don't need to "light your torch" (turn on your flashlight) when you are rebooting Mark VI control processor(s). And so that you don't have to explain to the Supervisors and Managers what happened, and why it will never happen again....
Now, if you have re-booted all of the control processors and they are now back at a controlling state with their outputs enabled, and this Mark VI is controlling and protecting a GE-design heavy duty gas turbine you will likely see at least one alarm indicating that the unit is NOT on cooldown (hydraulic ratchet; turning gear; slowroll; whatever the means at your site is called that's used to prevent the compressor rotor from warping when it's hot/warm).
That's because the default mode of the Speedtronic panel when it's powered-up is try to put the unit on cooldown. The Speedtronic doesn't know if the turbine rotor is hot or cold, so it tries to protect the rotor by putting the unit on cooldown--and when there aren't any auxiliary motors running, it can't, hence the alarms.
At this point, you need to go into Toolbox and find the logic signal that will allow you to de-select cooldown control. That signal name is usually L62CD, and it's usually driven by a timer or a combination of a timer and a counter. You will need to force L62CD to a logic "1" to be able to select COOLDOWN OFF from an HMI display.
You will need to unforce L62CD to see if it remains a logic "1" or returns to a logic "0" BEFORE selecting COOLDOWN OFF. Sometimes, forcing it to a logic "1" will latch it to a logic "1"; sometimes it won't. If it stays at logic "1", then you can select COOLDOWN OFF and start closing auxiliary motor mains breakers.
If it returns to a logic "0" when you unforce it, then you are going to have to figure out how to toggle the counter to get L62CD to remain a logic "1" when you unforce it so that you can go select COOLDOWN OFF and then go and close auxiliary motor starter mains breakers. Because, if you can't select COOLDOWN OFF and have the unit remain off cooldown and you close the Aux. L.O. Pump motor starter mains breaker the motor will immediately start! With you standing in front of the starter! (And that's a violation of most safety procedures these days in most parts of the world.) So, you want to make sure COOLDOWN OFF is selected and remains off when you unforce the permissive so that no auxiliary motor starts when you close its motor starter mains breaker. (You'll know that cooldown is off when the process alarm(s) telling you that it's not on can be cleared from the Alarm Window.)
Hope this helps!
Again, I would wager good money the above would be missing from any procedure you might obtain from GE Controls Connect. But, then, I've been wrong before and I will be wrong again in the future, probably the not-too-distant future, either.
And I would like to be wrong about this, too; but, well, odds are against that. GE Controls Connect pretty much focuses on the Speedtronic equipment, and forgets that in the field it's connected to live equipment and a turbine, auxiliaries, and a drive device (generator, compressor, etc.). They might know a lot about the Speedtronic, and how to reboot the control processors, but if you blindly follow any procedure you might get without remembering there are field devices and instruments and motor starters all driven by the Speedtronic you might get a rather large surprise--especially if you aren't carrying your torch!
