Running direction with a Zimo decoder....?

[Zerogee]

A quick question....

My newly-arrived TL45 "Pfiffi" has a Zimo sound decoder factory-fitted, which works very nicely and sounds wonderful - but there is just one oddity...... the loco drives in the opposite direction to all my other chipped locos. In other words, while turning the knob on my Navigator to the right (clockwise) normally drives a loco forwards, the Pfiffi goes backwards - and vice-versa of course, to make it run forwards I have to turn the Navi knob anti-clockwise.
Now, I seem to recall that there has been mention of this being a peculiarity where G (or "large scale") locos run the opposite way to the NMRA DCC standard - and I believe some US-built locos actually have a changeover switch for selecting one or the other - so I'm assuming that for some reason the Zimo chip is set to the NMRA default rather than the accepted Large Scale setting?
I'm assuming there is a particular CV that changes this over, does anyone happen to know what this would be for a Zimo decoder? While it's not a big problem, I'd obviously like to have it set the same as everything else just to reduce potential operator confusion (ie: mine!).....

Thanks in advance for any help and advice!

Jon.

 

[PaulRhB]

Jon
It's cv29 add 1 to the value for reverse.
http://www.kohs.com/PDFs/Technical docs/Zimo CV List.pdf
Default is 14 according to Zimo which is 28 speed steps active, analog & Dcc and railcom on. So a value of 15 should reverse direction

 

[Zerogee]

Thanks Paul! I've just looked in the TL45 manual (which does give a list of the most important CVs, all in German of course) and that actually shows a value of 15 as the "factory" setting for the Pfiffi.....
When I get the chance to put it back on the test rollers again I'll try to read out CV29, and if it is set at 15, I will try reducing it to 14!

Jon.

 

[PaulRhB]

Yep that should do it

 

[ntpntpntp]

You'd assume they'd get it right at the factory, perhaps the decoder's been reset at some point?

Check the directional lighting also stays correct in relation to the direction bit in CV29. I've had decoders where the DIDN'T happen, so ended up swapping the motor connections... but then you get into the problem of which way the loco runs under analogue DC so you swap the pickup wires as well / instead. All good fun!

It is indeed true that the analogue DC polarity for LGB is opposite to the usual NMRA standards for other scales. Personally I strive to make sure that the direction bit is left as "normal" when I fit decoders.

 

[Greg Elmassian]

I've had this happen, and I swap the wires on the motor, I have found situations where the cv29 bit did not work right... worked fine normally but did weird stuff in a consist.

I like locos wired right.

Greg