70E Posted April 13, 2020 Share Posted April 13, 2020 Yesterday I decided to run a Hornby sentinel on a small layout, because the loco hadn't been used in a while it was a bit hesitant. kept stopping and starting etc using a Z21 control, so after cleaning the wheels etc I put it on the large oval layout to give it a bit of a run-in using Lenz 100. Placing it on the track it made the noise when there is a short or something, anyway whatever caused that after checking the wheels was resolved, the loco then started to work, however, it became apparent there wasn't any control over its speed to slow it to a stop so it keeps running at a constant speed and won't stop. I have tried the emergency stop, I have put it on the programme track and it still keeps running, so I can't read CV's or programme anything. I've read about DC mode sometimes causes issues but if I can't stop the motor running is there anything else I can do. It's only a Hornby 4 pin decoder so not expensive to replace if that is the only answer? Mark Link to comment Share on other sites More sharing options...
WIMorrison Posted April 13, 2020 Share Posted April 13, 2020 When you say Z21 do you mean a Z21 command station or the Z21 app on a phone? Link to comment Share on other sites More sharing options...
70E Posted April 13, 2020 Author Share Posted April 13, 2020 I have the Z21 app on an iPad but even if I unplug the decoder and back I. again it still keeps running, so Im guessing the decoder has retained the command to power the motor somehow. Link to comment Share on other sites More sharing options...
WIMorrison Posted April 13, 2020 Share Posted April 13, 2020 What command station are you using? Link to comment Share on other sites More sharing options...
70E Posted April 13, 2020 Author Share Posted April 13, 2020 Roco Z21 start Link to comment Share on other sites More sharing options...
RAF96 Posted April 13, 2020 Share Posted April 13, 2020 Turn off DC running in CV29. Link to comment Share on other sites More sharing options...
70E Posted April 14, 2020 Author Share Posted April 14, 2020 would if I could, that's the problem, I can't stop the motor from running to re-programme it, I put it on the programming track and it shoots off! Link to comment Share on other sites More sharing options...
Pete the Elaner Posted April 14, 2020 Share Posted April 14, 2020 (edited) Can you program on the main? Try setting CV29 to 2. Default is usually 6, so changing this to 2 should turn off DC. Edited April 14, 2020 by Pete the Elaner Sorry, wrong number. Link to comment Share on other sites More sharing options...
charliepetty Posted April 14, 2020 Share Posted April 14, 2020 On 13/04/2020 at 09:39, 70E said: Yesterday I decided to run a Hornby sentinel on a small layout, because the loco hadn't been used in a while it was a bit hesitant. kept stopping and starting etc using a Z21 control, so after cleaning the wheels etc I put it on the large oval layout to give it a bit of a run-in using Lenz 100. Placing it on the track it made the noise when there is a short or something, anyway whatever caused that after checking the wheels was resolved, the loco then started to work, however, it became apparent there wasn't any control over its speed to slow it to a stop so it keeps running at a constant speed and won't stop. I have tried the emergency stop, I have put it on the programme track and it still keeps running, so I can't read CV's or programme anything. I've read about DC mode sometimes causes issues but if I can't stop the motor running is there anything else I can do. It's only a Hornby 4 pin decoder so not expensive to replace if that is the only answer? Mark Check its on the correct address. 1 Link to comment Share on other sites More sharing options...
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