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Reply to "Reset code for 6-28009 4-6-4 Hudson"

GGG posted:

By the way this is one of those area I don't think anyone really knows.  But some old tech notes stated 0 invert Serial data, 7 Keeps serial data on in conventional, 3 disables serial data in conventional but keeps chuff on.  ORDER DOES NOT Matter so 34 = 43.  Pulled that out from the way back machine.  G

Correct. The OP's loco has one of those funky modular 103 e-units for a motor driver/conventional reverse unit, AND an R2LC for TMCC. The "3" tells the R2LC to stand-down in conventional mode, and let the 103 do its thing.

TRW

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