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MASSOTH
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CV-Programming, Direct Mode CV Programming, (DM)
CV settings may be changed by a process called CV programming. Direct Mode
Programming is typically conducted on an isolated, low power (current-limited)
programming track section. Programming can be accomplished in
bit-by-bit mode
(allowing one of the eight bits to be altered) or in
complete byte mode
(allowing the
whole byte - all eight bits – to be altered). The DiMAX system also allows the user to
read
the value of CVs.
•
DCC
DCC is an acronym for Digital Command Control. With DCC, a digital signal is
transmitted along the rails and interpreted by devices (decoders) on the network. With
NMRA DCC, the communication protocol along the rails is standardized, allowing
interoperability between manufacturers. Motorola and MTH offer competing Digital
Command Control systems that are not compatible with NMRA DCC. Since the central
station and decoders must communicate with the same language or
protocol
, NMRA
DCC is not compatible with the Maerklin (Motorola) or MTH (DCS) Digital Command
Control systems.
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Decoder
A decoder (switch decoder, locomotive decoder) converts the commands of the central
station into the respective action (e.g. operate a switch, control a motor, control lighting
outputs). Locomotive decoders receive power and instructions from the bi-polar DCC
waveform transmitted along the rails.
•
Digital System
A digital system is an electronic control system designed to allow independent
operation of multiple trains on the same track. Commands sent to mobile decoders
allow the user to control motor speed and direction, as well as, the status of various
function outputs for lights, smoke units, uncouplers, etc. Each locomotive or device
controlled by the digital system requires a decoder that features a unique address.
NMRA digital systems feature standardized communication protocol along the rails.
This protocol is not compatible with the signal used by other non-NMRA DCC digital
systems, e.g., Motorola (Motorola) and MTH (DCS).
•
Digital Address
In a digital system, each mobile decoder (locomotive decoder, function decoder) or
stationary decoder (accessory decoder, switch decoder) needs a discrete, individually
distinct or unique numerical address. The capability of the digital system determines
the number of available addresses. Basic systems, like LGB’s MTS are limited to 22
locomotive addresses and 128 switch decoder addresses. More sophisticated
systems, like the Massoth DiMAX, are capable of operating up to 10,239 locomotive
addresses and 2,048 switch decoder addresses.
21
DiMAX
®
1203B Digital Booster