I have a USB module, a power module and an Oled display, no other modules because “for now” I only want to control Zigbee lighting via the Oled display. Zigbee lamps are on the Homeassistant but I have not connected the latter of course. So I first want to configure that OLED module. Unfortunately, it is not found after scan. I measured resistance, terminator on the Oled on and then 220 ohm, unfortunately I cannot terminate another module because the USB module has no terminator (at least I see nothing) How can I solve this?
Arrrrrr
You need a minimum of TWO active Velbus modules to start the bus timings.
I will say that if you look at the back of the glass panel, the two activity lights are flashing an error code in harmony.
The front LED feedback lights are probably Double Flashing too, to signal that it’s an orphan (as in, the CANbus chip can’t see at least one other device)
The USB module is not an active module, just an interface.
I’m sorry to say you’ll “have to” get another Velbus module to move further.
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Try to conect a 200 ohms resistor between L and H of the USB module conector
Sorry, that really won’t work.
He only has 1 active Velbus device.
FYI the Terminator switch or jumper pair on module does exactly what you’re suggesting.
The old style USB and/or serial modules are active CAN devices.
It powers-up, listens to the BUS, and sends ACK for any CAN frames it sees.
I just connected a VMB1RSUSB and a a VMBDMI-R… it seems to work fine. I can connect in Velbuslink, and control a lamp attached to the VMBDMI-R.
I can even pull the terminator from the VMBDMI-R and it still all works (though this bus is quite short).
Nope, there is nothing to light up on the Oled screen nor front nor back, but i see also that the connectors are different from normal Velbus screens
And i need this:
Sorry to disagree
There are status LEDs on the back of all the glass panels.
You should have
A power LED
Data RX
Data TX.
The V2.0 versions, with the spring fit Wago connectors also have an LED on the back to show the Terminator status.
If you haven’t got a single LED illuminated, I would suggest you’ve got a power issue.
I didn’t know that, I was always under the impression that all the USB devices couldn’t start the CANbus timings.
Only the small led on top nearby the connector is illuminating the other two not, For Velbus i got a windows laptop as Velbus does not work on Mac. I don’t know how settings for com ports are on Windows but on my screen i got bus active receiver ready. The first time i do scan i got full buffer, the second time no errors but the module stays offline.
There was a problem with the connector on the behind of the Oled display, for the test i connected wires with square bus on the pins, now de display was iluminating and the leds blinking, too bad buffer problems in the software, so now waiting for some extra devices, than i can connect the second terminator. Now i also need a connector who fits on the back of the oled. Someone know where to got such connectors? the 2 (red black and white yellow connectors what are also in the box are too big to fit on the 4 pins.
Contact the seller of the OLED and request the correct Phoenix connector, if the item was from the factory, it should have had the correct connector
FYI, if you aren’t using very long cables, you might not need any terminators in place.
Over terminating can be as bad as insufficient 