Step 4: Configuring for Consist Operation
The DSD supports advanced consist operations, which use five related CVs:
CV 19, Consist Address CV 21, Consist Function Control 1 CV 22, Consist Function Control 2 CV 23, Consist Acceleration Rate CV 24, Consist Braking Rate
A consist is a group of locomotives that are set up to respond to throttle commands as a single unit. Consists make it easy for one operator to run a double headed steam train or a multi-unit diesel lash-up for example. The consist CVs allow the DSD to recognize a new address assigned to the consist without changing its primary or extended addresses. Additionally, they allow each locomotive in the consist to be run as a single unit but with different function properties allowing for example, only the horn to blow on the lead engine.
Consist Address Each locomotive in the consist is assigned the same consist address by programming CV 19 with the consist address between 1 and 127. If a locomotive is facing backwards in the consist (common in diesel operations), it should be programmed with the same consist address plus 128. If the forward facing locomotives are set to consist address 60 for example, the backwards engine must be set to 60+128 = 188. Failure to do this will turn the consist into an angry pushme-pullyou as all locomotives will try to move forward from the perspective of their own cab and a few pulled couplers might result!
To deactivate the consist address and restore normal operation, CV 19 must be reprogrammed to 0.
Note that when the consist address is set, the DSD will continue to respond to instructions sent to its primary or extended address except for speed and direction data.
The DSD will not respond to operations mode programming commands sent to its consist address. These commands must always be used with the primary or extended address.
Consist Function Enable CV 21 and 22 allow you to define how each engine individually responds to function commands sent to the consist address. When the consist is enabled, CV 21 controls which of functions 1-8 are active and CV 22 controls the F0 function for forward (F0(f)) and reverse (F0(r)), as well as functions 9-12.
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