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L28FDAL28FDB, L28FDC, L28FDD... These logics are becoming 1 when the FD reaches some specific counts which are defined by GE. Could anyone tell me about this?

In the flame detector monitor, when the count is less than 16, the logic will become 1.

Please very it whether it is less than 16 or greater than 16. I don't think less than 16 is correct.

To ascertain the threshold of your flame detector logic, you need to check Screen 3/5 of TCEA definitions within your IO Configurator. The values in here are 1/16 so a value of 1 in here is a count of 16 as per the previous reply.

Hope this helps.

Martin

Thank you so much Mr. Martin.

I hope this but that first response was the logic such as L28FDS, L28FDB, L28FDC, L28FDD says that it becomes 1 when the count is less than 16. If it is so our turbine can't be running. It should be greater than 16. It might be typographical error.

Have you read Section. 7.8 of the the Mark V Application Manual, GEH-6195?

I read but he hasn't given any clear threshold value. Instead he has given as THRESOLD HIGH & LOW ..._HI[0] to _HI[7], -LO[0] to -LO[7]. How can find the threshold in terms of count? Please help me.

I'm confused about your confusion. The threshold value is the value of counts for the flame detector input above which the associated logic signal will be a "1". There were some versions of TCEA PROMsets that implemented a high- and low threshold value which could be activated through software, primarily for DLN-I applications.

So, for FD_INTENS_1 if the threshold value in the I/O Configurator is set for 16, then when the counts of the input exceeds 16 L28FDA will be set to a logic "1".