Basic Programing
Tsunami2 Electric User’s Guide
18
Configuring the Decoder
After setting the address, we recommend you adjust the settings of
CV 29 (Configuration Data 1). CV 29 controls a variety of important
settings. It determines locomotive direction, speed-step mode,
alternate power source, speed tables, and the decoder address.
Configuring CV 29
Add the values of all bits set to 1 in CV 29 and enter the sum into the CV to adjust settings. For
information about CVs and entering CV values, refer to “CV Programming Tutorial.”
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
0
EAM
STE
0
APS
F0
DIR
DIR: Locomotive Direction
Bit 0 (DIR) is used to determine locomotive direction. Setting bit 0 to 1 will invert direction
commands, and the decoder will interpret forward as reverse, and reverse as forward. This
operating mode is most useful for setting up diesel engines that ran with the long hood section
forward. However, it is also useful for electronically correcting installations where the motor
wires were accidentally reversed and avoids dismantling the locomotive a second time.
F0: F0 Location (Speed-Step Mode Select)
Bit 1 (F0) is used to determine the number of speed steps within the throttle range. 14, 28, and
128 speed-step modes are available, and 28/128 speed-step mode has been enabled by
default. Select the highest number of speed steps supported by your command station for the
most refined throttle operation.
APS: Alternate Power Source (Analog Mode)
Setting bit 2 (APS) to 1 will allow the decoder to use an analog power source when a DCC
signal is not present. Entering a value of 1 into CV 12 (Alternate Power Source) will enable
analog mode (disabled by default). Refer to “Configuring for Analog Mode Operation” for more
information.
STE: Speed Table Enable
Setting bit 4 (STE) to 1 will select a linear or 28-point custom speed table in place of the 3-point
speed table. Refer to “Configuring Throttle and Braking” for more information.
EAM: Primary or Extended Address
Bit 5 (EAM) is used for selecting the active address. Setting bit 5 to 1 will enable the primary
address. Set the primary address with CV 1 (Primary Address). CVs 17 and 18 (Extended
Address) are used to set the extended address. Set bit 5 of CV 29 to 1 to enable the extended
address. Refer to the previous section, “Configuring the Address,” for more information about
setting the extended address.
Refer to Table C on the following page to view decimal values for CV 29.
Decoder Configuration CVs
CV 29: Configuration Data 1
+1 = Bit 0 (DIR) set to 1
+2 = Bit 1 (F0) set to 1
+4 = Bit 2 (APS) set to 1
+16 = Bit 4 (STE) set to 1
+32 = Bit 5 (EAM) set to 1