Re: DR4088LN-CS with DR4088CS trailing blocks turn on and off when metal wheels pass over insulated jointer
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In software other than JMRI (or feedbacks other than DR4088xx) this ‘bouncing’ can be cured by increasing the feedback switch-on delay slightly, from 0ms to 25ms, or even 50ms. This creates enough time for the wheel to bridge the gap and move on before showing occupancy. ? There may be a similar setting in JMRI that you can change because if memory serves correctly the DR4088xx doesn’t have any LN CVs that you could use to increase this switch on delay. ? Iain Morrison ?
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From: [email protected] <[email protected]> On Behalf Of Mike's DeepRun RR via groups.io
Sent: 30 January 2025 20:50
To: [email protected]
Subject: DR4088LN-CS with DR4088CS trailing blocks turn on and off when metal wheels pass over insulated jointer? When running a train with multiple cars and a single engine the first block activate as expected when the engine enters it but then when the trailing cars with metal wheels cross the insulated jointer between blocks the trailing block activates for an instant. This does not happen with every car or with every block pair. I can track the activation using the YD7001 loconet feed back monitor, and the loconet monitor in JMRI. The layout panel in JMRI also flashes the trailing block while the block with the engine remains solid. I have three power districts one powered by the YD7001 and two DR5033 boosters. Each district has its own set of DR4088LN-CS and DR4088CS? with two 64 and one 48 sensed tracks. For block wiring I have the sensed wire and the common wire connected to the track with both ends of the block rails isolated from the adjoining blocks.? I insulate the common wire also. The sensed wires go to a DR4088 input and the common wire goes a terminal block. These are powered from the command module or booster main bus outputs. My hope is there is a setting in the YD7001 or JMRI that would allow me to reject the false detections.? I tried the 470 ohm shunt on one of the problem sensors but it did not help. I think this has been happening for a while but I just started paying attention to it. My equipment is about 4 years old and bought mostly at the same time.? Mike's Deep Run RR
Virginia USA
YD7001 command station
DR4024 servo switchers? DR4088LN-CS DR4088CS
DR5013 reverse loop? DR5033 boosters
JMRI/CATS and Enet loconet connection
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