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FAQ:Is it Possible to read CVs

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DCC Categories Decoder, Multifunction Decoder, Programming
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It is possible to read the contents of a configuration variable.

To do this a program track must be used, as this process requires Service Mode to work. Read the manuals for your system for all the details. JMRI can also read and record all the CVs in a decoder.

CV readback is not possible during normal use, nor when using Operations Mode (sometimes called Programming on the Main).