Mark V All Thermocouples Not Showing IO CFG

J

Thread Starter

JJss

GE Mark V control system (TMR) IO configuration screen all the Thermocouples are connected to the <R>TBQA terminals are not showing.<pre>
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IO Config Screen:-


TCQA Card Definition - Socket 1 - Screen 16/21

Thermocouple Type Selection


TC 1: K TC 5: K TC 9: K TC 13: -
TC 2: K TC 6: K TC 10: K TC 14: -
TC 3: K TC 7: K TC 11: K TC 15: -
TC 4: K TC 8: K TC 12: K


Valid types: K, J, E, T
not used : -


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IO.ASG:-


TC01_16_31_V TC01_16_31_V TC ;Q-TBQA-VOTED Unused voted TC value #1
TC02_17_32_V TC02_17_32_V TC ;Q-TBQA-VOTED Unused voted TC value #2
TC03_18_33_V TC03_18_33_V TC ;Q-TBQA-VOTED Unused voted TC value #3
TC04_19_34_V TC04_19_34_V TC ;Q-TBQA-VOTED Unused voted TC value #4
TC05_20_35_V TC05_20_35_V TC ;Q-TBQA-VOTED Unused voted TC value #5
TC06_21_36_V TC06_21_36_V TC ;Q-TBQA-VOTED Unused voted TC value #6
TC07_22_37_V TC07_22_37_V TC ;Q-TBQA-VOTED Unused voted TC value #7
TC08_23_38_V TC08_23_38_V TC ;Q-TBQA-VOTED Unused voted TC value #8
TC09_24_39_V TC09_24_39_V TC ;Q-TBQA-VOTED Unused voted TC value #9
TC10_25_40_V FTG TC ;Q-TBQA-VOTED Unused voted TC value #10
TC11_26_41_V TC11_26_41_V TC ;Q-TBQA-VOTED Fuel Gas Temperature
TC12_27_42_V TC12_27_42_V TC ;Q-TBQA-VOTED Unused voted TC value #12
TC13_28_43_V TC13_28_43_V TC ;Q-TBQA-VOTED Unused voted TC value #13
TC14_29_44_V TC14_29_44_V TC ;Q-TBQA-VOTED Unused voted TC value #14
TC15_30_45_V TC15_30_45_V TC ;Q-TBQA-VOTED Unused voted TC value #15

R_R_TC01 TTXD_1 TC ;R -TBQA-001 EXHAUST TEMPERATURE TC
R_R_TC02 TTXD_4 TC ;R -TBQA-003 EXHAUST TEMPERATURE TC
R_R_TC03 TTXD_7 TC ;R -TBQA-005 EXHAUST TEMPERATURE TC
R_R_TC04 TTXD_10 TC ;R -TBQA-007 EXHAUST TEMPERATURE TC
R_R_TC05 TTXD_13 TC ;R -TBQA-009 EXHAUST TEMPERATURE TC
R_R_TC06 TTXD_16 TC ;R -TBQA-011 EXHAUST TEMPERATURE TC
R_R_TC07 WTAD TC ;R -TBQA-013 Cooling water temperature
R_R_TC08 LTTH1 TC ;R -TBQA-015 Lube oil thermocouple turbine header
R_R_TC09 CTDA1 TC ;R -TBQA-017 COMP DISCHARGE TEMP –
R_R_TC10 FTGI1 TC ;R -TBQA-019 FUEL GAS TEMPERATURE
R_R_TC11 AAT1 TC ;R -TBQA-021 Air atomizing temperature
R_R_TC12 CTIF1A TC ;R -TBQA-023 COMP INLET FLANGE TEMP -]
R_R_TC13 R_R_TC13 CNT15 ;R -TBQA-025
R_R_TC14 R_R_TC14 CNT15 ;R -TBQA-027
R_R_TC15 R_R_TC15 CNT15 ;R -TBQA-029
S_R_TC16 TTXD_2 TC ;R -TBQA-031 EXHAUST TEMPERATURE
S_R_TC17 TTXD_5 TC ;R -TBQA-033 EXHAUST TEMPERATURE
S_R_TC18 TTXD_8 TC ;R -TBQA-035 EXHAUST TEMPERATURE
S_R_TC19 TTXD_11 TC ;R -TBQA-037 EXHAUST TEMPERATURE
S_R_TC20 TTXD_14 TC ;R -TBQA-039 EXHAUST TEMPERATURE
S_R_TC21 TTXD_17 TC ;R -TBQA-041 EXHAUST TEMPERATURE
S_R_TC22 S_R_TC22 CNT15 ;R -TBQA-043
S_R_TC23 LTTH2 TC ;R -TBQA-045 Lube oil thermocouple turbine header
S_R_TC24 CTDA2 TC ;R -TBQA-047 COMP DISCHARGE TEMP
S_R_TC25 FTGI2 TC ;R -TBQA-049 FUEL GAS TEMPERATURE
S_R_TC26 AAT2 TC ;R -TBQA-051 Air atomizing temperature
S_R_TC27 CTIF2A TC ;R -TBQA-053 COMP INLET FLANGE TEMP - TC
S_R_TC28 S_R_TC28 CNT15 ;R -TBQA-055
S_R_TC29 S_R_TC29 CNT15 ;R -TBQA-057
S_R_TC30 S_R_TC30 CNT15 ;R -TBQA-059
T_R_TC31 TTXD_3 TC ;R -TBQA-061 EXHAUST TEMPERATURE TC # 3
T_R_TC32 TTXD_6 TC ;R -TBQA-063 EXHAUST TEMPERATURE TC # 6
T_R_TC33 TTXD_9 TC ;R -TBQA-065 EXHAUST TEMPERATURE TC # 9
T_R_TC34 TTXD_12 TC ;R -TBQA-067 EXHAUST TEMPERATURE TC # 12
T_R_TC35 TTXD_15 TC ;R -TBQA-069 EXHAUST TEMPERATURE TC # 15
T_R_TC36 TTXD_18 TC ;R -TBQA-071 EXHAUST TEMPERATURE TC # 18
T_R_TC37 T_R_TC37 CNT15 ;R -TBQA-073
T_R_TC38 LTTH3 TC ;R -TBQA-075 Lube oil thermocouple turbine header
T_R_TC39 T_R_TC39 CNT15 ;R -TBQA-077
T_R_TC40 FTGI3 TC ;R -TBQA-079 FUEL GAS TEMPERATURE
T_R_TC41 T_R_TC41 CNT15 ;R -TBQA-081
T_R_TC42 T_R_TC42 CNT15 ;R -TBQA-083
T_R_TC43 T_R_TC43 CNT15 ;R -TBQA-085
T_R_TC44 T_R_TC44 CNT15 ;R -TBQA-087
T_R_TC45 T_R_TC45 CNT15 ;R -TBQA-089
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Why all the 45 pairs are not there in the IO configuration screen? (Only 12 TC are shown used)

Kindly anybody can explain
 
Jjss,

Kindly, they are all there in the I/O Configurator.

Kindly remember--the TCQA I/O configuration is downloaded to <R>, <S>, & <T>. The first 15 T/Cs terminated on the TBQA on <R> are ribbon-cabled to <R>; the second 15 T/Cs are ribbon-cabled to <S>; and the last 15 T/Cs are ribbon-cabled to <T>.

All this screen does in the I/O Configurator is enable--or disable--the 15 T/C inputs to each of the three control processors (by defining the type of T/C) to each of the three control processors. The names of the 45 T/Cs are defined in IO.ASG (along with the scale type/code).

Hope this kindly helps! Kindly.
 
JJss,

Thanks for the kindly feedback.

It might be clear, but the presumption is that T/Cs connected to the TBQA on <R> will be "redundant"--that is, that when a parameter is being measured (like Fuel Temperature-Gas (FTG)) there will be three T/Cs in the piping measuring the temperature of the incoming fuel gas, and that one of them will be connected to <R>, one to <S>, and one to <T>.

So, because there are three of them, and they need to be connected to the same processor input channel (TC10_25_40) there only needs to be one page in the I/O Configurator--which is then downloaded to <R>, and <S> and <T>. And, that page in the I/O Configurator simply enables the input to the TCQA card.

You will note from the information provided in your original post, there is an Atomizing Air T/C connected to TC11 (AAT1) and another connected to TC26 (11+15), but none connected to TC41 (11+15+15). And, that in the TMR input definition section of IO.ASG there is no AAT definition. And lastly, you will note that the eleventh T/C input to the TCQA card in the I/O Configurator is enabled for a Type K T/C.

So, this means that there should be a wire jumper at the TC41 input terminals (TBQA-81 & -82) because if there isn't there will be a Diagnostic Alarm that the 11th T/C input to <T> has failed. And, that in the CSP there is a median- or high-select block choosing the higher of AAT1 and AAT2 to be AAT--the atomizing air temperature.

The exhaust T/Cs are a little different, and they aren't really "redundant" but measure the exhaust temperature radially around the exhaust diffuser. For your machine, there are 18 T/Cs, each measuring the temperature in a 60 degree arc of the exhaust--so there are three T/Cs (one for <R>, one for <S>, and one for <T>) in each 60 degree arc. When all three control processors are healthy and reading their T/C inputs, they all use all 18 exhaust T/Cs to calculate the median exhaust temperature (TTXM). But, when one of the control processors is off-line the two remaining processors will use only the "remaining" 12 exhaust T/Cs to calculate TTXM.

For the combustion monitor, when all three control processors are healthy they use all 18 exhaust T/Cs when calculating spreads and determining adjacency.

So, while six exhaust T/Cs are connected to <R>, six to <S>, and six to <T>--the Mark V (when all the processors are healthy and on-line and communicating) are using all eighteen exhaust T/Cs in their calculations. It's just that--for redundancy purposes--six are connected to one control processor, six to the second control processor and six to the remaining control processor.

But, still, because of the "split" of the T/C inputs to the TBQA on <R> (physically done by the three ribbon cables from the TBQA, one to <R>, one to <S> and one to <T>) there is redundancy for each of the three 60 degree arcs of the exhaust area. If all the T/Cs were connected to the TBQA and then to <R>, if <R> fails or were shut down while the turbine is running then the unit would have to be tripped--because there are no exhaust T/Cs connected to <S> or <T>.

This confuses many people--the fact that inputs physically terminated on terminal boards on <R> are, in fact, connected to <S> and <T>--some of them directly to <S> and <T> (like the T/C inputs), and some by "paralleling" them (or, "fanning them out") to all three processors (<R>, <S>, and <T>).

This is done because the other variant of the Mark V--the SIMPLEX Mark V--does not have <S> and <T>. So, it can only have 15 T/C inputs to <R>, (and those connected to <C>). And in that case, the exhaust T/Cs are divided between <C> and <R> to provide some "redundancy." So, that's why all the T/C inputs to <R> AND <S> AND <T> are connected to the TBQA on <R>--because they use the same terminal boards in the SIMPLEX Mark V as they do in the TMR Mark V--just fewer of them.

Hope this helps! GE Speedtronic turbine control systems, like most control systems, bend the "rules" for different types of inputs--probably a little more than most other control systems do, though. That's because there are few TMR control systems other than Speedtronic control systems, and remember--Speedtronic turbine control systems are purpose-built control systems: They are designed and built to conform to the GE control philosophy of heavy duty gas turbines (and to a certain extent, the GE control philosophy for steam turbines). So, Speedtronic turbine control systems are "wired" and programmed specifically to conform to GE control philosophy (including protection philosophy).
 
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