In order to use OdakyufanAts on your train, create the ats.cfg and put the relative path to the OdakyufanAts.dll file inside.

Without a configuration file, the set of supported systems (ATS-SN, ATS-P and ATC) is looked up in the train.dat. In order to give you more control over the set of supported systems, you should create the OdakyufanAts.cfg file. If present, this file instead of the train.dat is used to look up the configuration. The rest of this page describes the possible settings you can make in the configuration file.

DurationOfAlarm is the number of seconds it takes before the emergency brakes are engaged after an S long beacon was passed and the alarm not acknowledged.
DurationOfInitialization is the number of seconds it takes for the initialization. The emergency brakes are engaged during this period.
DurationOfSpeedCheck is the number of seconds between 108.5 KHz beacons for purposes of speed checking. As far as I know, 0.45 seconds are used for ATS-SK, 0.55 seconds for ATS-SF, and 0.50 seconds for ATS-SS/ST/SW.

MaximumSpeed is the maximum speed in km/h. ATS-Ps is designed for speeds up to 140 km/h.

DurationOfInitialization is the number of seconds it takes for the initialization phase. The service brakes are applied during this period.
DurationOfBrakeRelease is the number of seconds a brake release lasts, or zero to disable the feature.
DesignDeceleration is the deceleration in km/h/s used in the brake and warning pattern calculations.
BrakePatternDelay is the number of seconds assumed as a reaction delay for the brake pattern.
BrakePatternOffset is the number of meters the brake pattern ends before the point of danger.
BrakePatternTolerance is the speed difference in km/h added to the target speed.
WarningPatternDelay, WarningPatternOffset and WarningPatternTolerance similarily apply for the warning pattern.
ReleaseSpeed is the release speed in km/h. The brake pattern does not fall below this value.
MaximumSpeed is the maximum speed in km/h.

AutomaticSwitch indicates whether the train automatically switches between ATS and ATC. Can be true or false.
EmergencyOperation is the speed in km/h in emergency operation mode, or zero to disable the feature.
Aspect is any aspect greater than or equal to 10, and Code is the matching code. See the section on codes on the ATC page.

TimeUntilBell is the number of seconds since the handles or horns were last operated before the bell starts to sound.
TimeUntilBrake is the number of seconds since the handles or horns were last operated before a brake application takes place.
SpeedThreshold is the speed in km/h below which the EB is inactive, or zero if the EB is active even on standstill.

DesignDeceleration is the deceleration in km/h/s used in the stop pattern calculation.