Q&A

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No. 470	Re: RS-485 & LAN - Collision on 485 BUS	2008-12-12

When EZL-200F sends serial data on RS485 BUS, it doesn't check if RS485 BUS is using. Of course When EZL-200F doesn't send serial data on RS485 BUS, it doesn't hold RS485 BUS. It means if EZL-200F receives data from TCP/IP while some RS485 device sends serial data on RS485 BUS, you may have collision on the RS485 BUS. by the way, is EZL-200F master or slave on your RS485 network? You can contact us by e-mail. The address is support@sollae.co.kr > Leo wrote: > ~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Hello, we have 12 devices connected in a RS-485 bus. Those devices must communicate to a computer. The only line between the devices and the computer is a LAN, so i've thinking to use the EZL-200F. I'm doing this test on my lab and i'm seeing sometimes that we have collision on the 485 BUS (when the device answer collisions with a request from the computer). How could i fix this collision problem?