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UCM/KNX with C-Bus to KNX Translator
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 Posted: Wednesday Sep 16th, 2020 09:14 pm
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mgedrych
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My C-Bus to KNX Translator is no longer talking to KNX. It had been working, but now it has stopped.
D10 blinks red every now and then. D9 is steady red. D8 is off.

There is 29V at the KNX connector.

What might this mean?

Thanks

Last edited on Wednesday Sep 16th, 2020 09:15 pm by



 Posted: Friday Sep 18th, 2020 03:52 am
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slychiu
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What is the state of RDY, BUSY1, BUSY2, ERRl ledsAlso please check the status bar on the bottom left on the NX screen. It should give you the current status on the UCM/KNX?

Last edited on Friday Sep 18th, 2020 05:03 am by slychiu



 Posted: Friday Sep 18th, 2020 04:53 am
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mgedrych
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D4 "RDY" (Green) is on
D8 "IN1" (Red) is off most of the time; it blinks on every now and then.D9 "OUT1" (Red) if on most of the time; it blinks off every now and then.D10 "ERR1" (Red) if off most of the time; it blinks on every now and then.
I don't know which LEDs you're referring to as BUSY1 and BUSY2. Those words do not appear on the PCBs and they're not mentioned in the "CBus to KNX Translator" manual.
D10 is ERR.
Photo of PCBs is attached.
I don't know what "NX screen" means. In the I/O monitor of the CBus Translator I can see that data is being sent to KNX but nothing is coming back:

Attachment: Photo_Sep_18_20 05-32-22 b.jpg (Downloaded 6 times)

Last edited on Friday Sep 18th, 2020 05:01 am by



 Posted: Friday Sep 18th, 2020 05:03 am
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slychiu
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Please check the KNX bus wires are screwed frmamly and has god contact. It apears that the data is sent to KNX but the module cannot detect any repy from the bus, hence the BUSY2 led is on
If the connection is good, the cbus to knx module or the KNX submdoule may be faulty



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