CV: 17, 18 Calculator

See also

CV29 Look Up Table

1. ONLINE

Bernard Rupp has provided this online calculator for direct programming of CV: 17, 18 for long addresses.

http://ruppweb.dyndns.org/xray/comp/decoder.htm

Using Lenz decoders on a Lenz version 3 system it is easy to program extended addresses using the Direct Function. This automatically calculates the values for CV17 and CV18 and sets the extended bit in CV29.
The same applies to Soundtrax decoders.

If however you have other suppliers decoders (Digitrax DN121, Wangrow DN103 etc) they must be programmed in Page mode and you need to calculate the values for CV17 and 18 as well as setting the extended bit in CV29. Cvs and Pages seem to be the same thing so in the example below I have called them page.

It is easy to calculate these values if you have access to a Windows computer.

a) Start the Calculator (usually found by Start, Programs, calculator).
b) Set it into Scientific mode. (Menu item View).
c) Type in your loco number (i.e. 2213)
d) Click on the Hex button.
e) Write down the display (i.e 8A5)
f) Key in the bottom two digits (i.e. A5)
g) Click on Dec
h) The new value is the data for Page18 (i.e. 165)
i) Click on Hex.
j) Key in the remaining digits (i.e. 8)
k) Add 192 (+192=)
l) The new value is the value for Page 17 (200).

Do not forget to set bit 5 in Cv29 (i.e. add 32)

Jack Russell
31October 2001.
jackr&tpg.com.au

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