I disconnected everything except the UR93 from the LocoNet T (leaving the two boosters on LocoNet B). I acquired a locomotive ONCE with the UT6D, ran it and then released it. After that I could no longer acquire anything. I powered off both the YD7001 and the UR93 and tried again. It seems to ALMOST acquire a locomotive but can't complete the last step to notify the throttle. When I attempted to acquire a new locomotive which was sitting there on the track, with the sound idling, as soon I got almost to the end of the sequence (pressed the Loco button on the throttle the second time), the sound went off. This was a locomotive with an ESU Version 5 decoder which has the sound off until you turn on F8, so it seems that it sent out a packet with the new settings with F8 off.

I tried a UT4D but couldn't get anywhere with it, even when I plugged it in! Nearly everything else is working fine (I have signals working, detection working, Railcom readers working fine, but Digitrax throttles just aren't working.

Scott Walton

Have you tried having the UR93 be the ONLY LocoNET device plugged into the YD7001?
My quick test the other night was the bare minimum - just the YD7001, UR93 and DT602DE
I seem to recall having an intial problem last year when the UR93 wasn't the first LocoNET device in the chain on my DCS240.?

I moved the UR93 and throttles over to a mini-layout with a DCS50 (the original Zephyr command station). I had no problem acquiring and running trains with the UT6D or the DT602D (I never even plugged them in). I also tried both a DT402D and a DT502D throttle on the YD7001 with the UR93.? Both come up, recognized the the correct network and both immediately went to "Idle" When I plugged them in, I could acquire the locomotives but could not run them when the throttles were unplugged (bot flashed the light when any communication was attempted). Curiously, the Loconet monitor for JMRI was showing the throttle commands, even though the throttle thought they weren't going out.

So it appears that there is something going on in the Loconet that is causing the issue, but I don't have clue what it is. Does anyone have any thoughts?

I have successfully used the Digikeijs DR4088LN-CS with the ESU LNet Converter for block feedback.

I have tried to connect the YaMoRC YD6016LN to a LNET Converter without success.?

Does anyone have experience of this configuration? Is it known not to work?

Thank you

Chris James

I previously had a Digitrax DCS240 and had no problems. Since I moved to the DR500 and not YD7001 acquiring a locomotive over the Duplex network doesn't seem to work. It acquires fine when plugged in, but not when disconnected. I get the same results with both a DT602D and a UT6D. I will try with a DT500D and see if I get the same results. I have monitored the Loconet transmissions and it seems to be almost comnplete, just missing the last transmission back to the throttle. Heres the JMRI Loconet monitor for the relevant area:

Yes it does work. For me it happened instantly with no config required.
A few things to check:

• The green light on the UR93 should flash every second. If you make a change in the DT602D throttle (eg F1) then the green light will flash at a different rate for a moment.
• The YD7001 LocoNET RX light should flicker whenever it sees data - eg pressing a function key).
• I have the DT602DE throttle as it uses the European frequencies and not the USA ones. I assume you have checked the use of the UR93 with a Digitrax control unit.

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--
Dennis Cherry
Owner/Moderator

Hi?
I'm thinking of using a spare output on my DR50018 to switch a lighting module on and off, the lighting module has its own external power source (accessory bus so about 16v DCC) and has an option to switch on and off remotely. I've set the output I'm using to preset 1 and there is a voltage present is there a way of turning the voltage off so it is like a volt free switch?

Thanks in advance?
Matt

I realized after I posted that there was more to discover about YaMoRC feedback modules from the manual, website and a YouTube video.
Just checking my knowledge here:
* the ES-in versions still get their power from a LocoNET module closest to the command module. (YD7001 doesn't have an ES link connector)
* the unreleased RC version gets its power from the track since presumably it draws more than LocoNET can supply.
* the main advantage of the ES versions is that I can configure several 6016 modules together with only one module needing to have a USB connection. (Ignoring the stick and Configuration module). So if I am prepared to configure each 6016 module on a computer before wiring it into the layout, then there is no need to have the ES wiring. The program button makes it even easier with no USB config required at all.
* the GND version is used for switches - buttons or point motor feedback switches. But you could use a CS version in turnout mode. I haven't seen any examples of this online. To keep things less complex I could simply buy a CS instead of GND versions. There is a price difference but the CS is slightly more versatile should I need to re-design the layout.

I use the LocoNET bus for several other things too (a bunch of Digitrax things too) plus I have a few of those Digikeijs LocoNET breakout modules. The main advantage there is that I don't need a single daisychained LocoNET cable leaping from one module to the next; I can fan the connectors out so that any change in the layout doesn't need a bunch of LocoNET cables to be re-made. More useful than you might think!

My main question remains though - just how many 6016 modules can I get powered from the LocoNET cable? What are the limits? In my case I will probably neet more than a dozen 6016 modules. Maybe even up to 2 dozen by the time I finish the second deck of the layout.
If LocoNET can't power all the 6016's then what are my options?

Thanks.

Am I correct in assuming that the YD6016LN GND modules get their power from the LocoNET T cable?
If so, then how many modules can I daisy chain from the YD7001?

I envisage using a mixture of CS, GND, and eventually RC modules probably over a dozen in total. What is the best way to connect all these modules back to the YD7001 via LocoNET? Or should I be looking at using the ES module to daisy chain?

I have a DR5000 (now a YD7001) connected to a LocoNet with a UR93 on it. I can run locomotives fine with either the DT602D or the UT6D throttles. However I can't seem to acquire the locomotives unless I plug them into the LocoNet directly. Has anyone else encountered this issue and is there something wrong in my setup?

Scott Walton

Thankyou Karst, I suspect the? 3 meter rule is the cause of the issues. this is going to be an expensive correction then as there are 11 modules on the layout handling track and turnout feedbacks. Even more so that i will swap to LN modules rather than s88.
Having just re-read your reply again am i right in thinking I could have for example 4 YD6016LN- CS modules and each of those modules could have 2 YD6016ES modules attached thus giving a total of 12 modules.?
The mainlayout is 3m x 1.5m.The offshoot to the right is not? connected to the feedback system

On Tue, Oct 24, 2023 at 01:50 AM, Andrew Jebb wrote:

Is there a limit to the number of S88 modules than can be in line?

Yes, the YD7001 Firmware can handle up to 16 modules, from which 8 are managed, the rest is unmanaged. ( managed means, the YD7001 controls what the feedbacks send to control software as well which are the addresses)

Further the maximum length of cable, starting from the ext88n-IN socket on the YD7001 until the very last Feedback's s88n-OUT must not exceed 3 meters. Some people believe 5 meters should work. Well it might, but it's outside specifications.

?

Is this a common issue with the digikeigs DR4088 family of modules.

Yes there is,

- as soon as wiring between module and track exceeds about 3 - 4 meters

- wiring to the track is twisted

- sections of track exceed 2-3 meters.

- the environment is "noisy" ( e.g. a lot of WiFi, Fluorescent lighting, big transformers )

Then the inputs act as a kind of antenna and will generate random occupation signals

Are the YamorC replacements more reliable?

Yes they are, since their inputs contain both a physical noise filter, as well as a configurable software filter.

Would using YAMORC YD6016 Loconet modules be better?

We advise LocoNet ( = YD6016LN ) for distances between feedback modules being larger than 1.5 meters. Note that each YD6016LN?can be extended by a maximum of 5 pcs YD6016ES when locally more than 16 input are required.

?

Greets,

Karst

Hi Iain
There are no LN modules connected the S88 units are connected into the S88 bus on the YD7001
Andrew

I have just completed and returned a 6 board modular layout I have bult to a friend and all the track feedbacks and turnout feedbacks are handled by Digikeijs DR4088 S88 modules. I have used a mix of 11 units, Current sensing for the track feedbacks and Ground units for the Turnout feedbacks (2 feedbacks per turnout) this info is then passed to ITrain via the YD7001. (DR5000 with upgrade)
All the above worked fine until the layout was moved to its permanant home and then when it was being re connected, The problem arose that as soon as i started conecting more than 6 of the S88 modules then the feedbacks became eratic and random? feedbacks started flashing all over the layout. 2 days of troubleshooting which included swaping out the link cables swapping module positions around etc would not solve this.
The above issue shows in both Itrain and also the S88 feedback monitor on the YAMORC YD7001 software.
Ok question time
Is there a limit to the number of S88 modules than can be in line?
Is this a common issue with the digikeigs DR4088 family of modules.
Are the YamorC replacements more reliable?
Would using YAMORC YD6016 Loconet modules be better?
I have more questions but will stop here for now
Andrew

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I'm? currently using Digikeijs DR5088RC for occupancy detection and railcom feedback.? With my recent layout expansion I find myself in need of 2 more DR5088RC modules, but have been unable to locate any worldwide.? I have been waiting for the YAMORC YD6016LN-RC which is equivalent to the DR5088RC, but it continues to be delayed.? Does anyone in this group know where I could purchase any DR5088RC modules?? Or does anyone know of an arduino DIY equivalent design I might be able to build myself?