The back EMF control used on this decoder will give superb results at slow speed when correctly set. The default CV values are suitable for many motors, however there may be instability in motor performance when the back EMF control is not matched to the requirements of the motor. If this is found to be the case CVs 53 to 55 should be adjusted to alter the back EMF settings to suit the motor suggested alternative settings to try are CV54=10 and CV55=62. In case of difficulty contact Bachmann Europe for more advice.
Maximum motor output 900mA continuous.
Function outputs maximum 500mA total, maximum 250mA on one output. All function controls are configurable.
Function button controlled shunting speed, halves the maximum speed when enabled.
Default Functions
|
F0
|
Directional Lights on/off
|
|
F1
|
Auxiliary Output 1
|
|
F2
|
Auxiliary Output 2
|
|
F3
|
Shunting Mode on/off
|
|
F4
|
Acceleration/deceleration simulated inertia on/off
|
Supported CVs and default values/settings
|
CV
|
Definition
|
Min-Max
|
Default
|
|
1
|
Locomotive Address
|
1-127
|
3
|
|
2
|
Start Voltage
|
1-64
|
3
|
|
3
|
Acceleration
|
0-255
|
16
|
|
4
|
Deceleration
|
0-255
|
12
|
|
5
|
Max Speed
|
0-64
|
64
|
|
6
|
Middel Speed
|
0-64
|
22
|
|
8
|
Manufacturer ID
|
ESU
|
151
|
|
17/18
|
Extended Address CVs (when selected)
|
128-9999
|
192
|
|
19
|
Consist Address
Value 0 or 128 disables consist address
1-127 Consist normal direction
192-255 Consist address reverse direction
|
0-255
|
0
|
|
27
|
Brake Mode (add together values)
Set to 0 to disable
Bit 3 Brake on DC if polarity against driving direction
Bit 4 Brake on DC if polarity with driving direction
|
|
24
|
|
28
|
RailCom configuration (add together values)
Bit 0 Channel 1 broadcast enable
Bit 1 Data trasmission on channel 2
Bit 7 RailComPlus automatic recognition enable
|
|
131
|
|
29
|
Decoder Configuration Register (add together values)
Bit 0 Default Direction control
Bit 1 28 or 128 speed steps (default 14 steps)
Bit 2 Analogue operation (default enabled)
Bit 3 RailCom enable (default enabled)
Bit 4 User Speed Curve (defined by CVs 67-94, default disabled)
Bit 5 Long Addressing (address from CVs 17/18 instaed of CV 1. Default disabled)
|
|
12
|
|
33-47
|
Function Mapping controls (see table in decoder leaflet)
|
0-255
|
disbaled |
|
49
|
Extended Decoder Configuration Register (add together values)
Bit 0 Back EMF motor control (Default enabled)
Bit 4 Automatic DCC speed step detection (Deafult enabled)
|
0-255
|
17
|
|
53
|
Feedback Control Reference
Max speed BEMF
|
0-255
|
140
|
|
54
|
Feedback Parameter K
Effect of load control, higher K the stronger the BEMF effect
|
0-255
|
50
|
|
55
|
Feedback Parameter I
Motor momemntum, higher I needs to be set for motors with high momentum, eg flywheel drives
|
0-255
|
100
|
|
67-94
|
User Defined Speed Table
Defines motor voltage for steps 1-28
|
0-255
|
disabled
|
|
112
|
Blink Frequency for lighting effects (eg warning beacons)
Multiples of 0.065536 seconds
|
0-255
|
16
|
|
113-114
|
Directional Lighting Brightness
113 Forward direction lighting, 114 Reverse direction lighting
|
0-255
|
15
|
|
115-118
|
Auxilliary Output Configuration (Brightness, operating mode etc.)
|
0-255
|
15
|
While the default back EMF settings are suitable for many locomotives and appear to work fine with all manufacturers' diesel locomotive models some tuning may be necessary with some steam locomotive models. We advise testing all decoder installations on a controlled section of track with stop blocks arranged to prevent a runaway locomotive from falling off the end.