![]() ![]() When the write has been successful the decoder will acknowledge (ack) to the Digital Command Station (DCS.) If the ack is not seen by the DCS it says the decoder did not respond. The CV data is written to ANY and ALL decoders on the programming track. Writing to Decoder on the programming track: If the ack is never received the Command Station tells DecoderPro that the Decoder did not respond. When the Command Station sends the decoder data that is in agreement with what is in the CV of the decoder, the decoder will send an ack. The computer folks call this an ack (for acknowledgement). ![]() Sometimes you can see the loco jump a bit as the decoder pulses the motor for “yes”. When DecoderPro is working it will show you what events are being performed. This can take a bit of time since the command station must ask all possible values waiting for the yes response.You can observe the process by looking down at the bottom line of all the panes (the status bar) where the word idle is normally shown when the programmer is inactive. The command station notices the current being drawn and stops asking questions, since it got the yes answer to the last question. They just respond to instructions, so special instructions were developed which allow the Command Station to determine the contents of the decoder's memoriesīasically the decoder is asked a wholeseries of questions and when the answer is “yes” it turns on the motor for only a very brief time. Most decoders cannot talk to send information back to the command station. To obtain information from the decoder on the programming track we rely on the ability of the decoder to respond to a query, what is known as Readback. Reading your Decoder On the programming track: Not all command stations support a dedicated programming track, and some brands will shut down the mainline power when in programming mode (not pleasant when you have an ops session in progress. (Probably because the Locomotive has to be taken to the servicing track to be programmed). With this button you program the locomotive on the dedicated programming track. Service Mode (programming track) Programmer.There are four buttons near the bottom, the first two of which are: What DCC systems will DecoderPro® work with?. ![]()
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