Resetting CV'S to their factory default On the programming track ONLY, write a value of 2 into CV8 or CV30. The decoder must go through a power off then power up, except the A1X, which will reset itself. CV'S will then reset to the factory default values on power up. Note: writing to CV8 does not actually change the value in CV8 because it is a read only register. When writing a two into CV8 it actually will write to CV30. This enables a factory reset with command stations that use physical register programming like the MRC 2000 and Atlas Commander. CVs that will be reset to the factory default are: 1, 2, 3, 4, 5, 6, 17, 18, 19, 29, 30, 49,50, 61. The user loadable speed table is not effected by the reset to default values.
TCS WOW decoder programming info- http://www.tcsdcc.com/Customer_Content/Technical_Info/WOWSound/guided_programming_vers3.php