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Modbus CRC error
#4
Total length is around 25 meter, I have from LM about 10 meter 2x2x0,8 KNX BUS-cable to a junction box. From this box I have splitted the bus in 2 direction, each direction is about 7-8 meters, one goes to floor 3, and the other goes to floor 1 (LM is placed on floor 2)

Slave #1 is using 3 wires with GND (GND is connected in both LM and RTU slave)
Slave #2 is 2 wires D+ and D- only.

It is not connected as daisy-chain, because I split the Bus-cable in the junction box and send it in different directions.

I set new MB-ID to slave #1, it generated much less invalid CRC but instead more "wrong slave", see attached.
Also I have removed all mapping to Slave #2, slave to is only connected to the RS485 without having anything mapped to it, and starts making trouble for slave #1 as seen on this log.

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Messages In This Thread
Modbus CRC error - by sx3 - 31.10.2016, 20:20
RE: Modbus CRC error - by sx3 - 01.11.2016, 06:43
RE: Modbus CRC error - by admin - 01.11.2016, 07:40
RE: Modbus CRC error - by sx3 - 01.11.2016, 08:14
RE: Modbus CRC error - by sx3 - 01.11.2016, 13:27
RE: Modbus CRC error - by admin - 01.11.2016, 13:40
RE: Modbus CRC error - by sx3 - 01.11.2016, 13:52
RE: Modbus CRC error - by sx3 - 01.11.2016, 18:31
RE: Modbus CRC error - by admin - 02.11.2016, 12:24
RE: Modbus CRC error - by sx3 - 02.11.2016, 13:04
RE: Modbus CRC error - by admin - 02.11.2016, 13:09
RE: Modbus CRC error - by Angeles - 20.03.2018, 09:39
RE: Modbus CRC error - by Daniel - 20.03.2018, 12:38

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