Posted 14 Jan 2021 Hi, I am doing a project to extract analog data from Kashiyama pump through RS422 port. I am using QJ71C24N to establish the connection. But it encounter error code 7D00. Can someone help to take a look what go wrong? Share this post Link to post Share on other sites
Posted 17 Jan 2021 @KhaiLun You have create protocol incorrect should be have start with 0x02 for FCS not to input "FCS" but need to calculate depend on your manual and terminaror should be 0x2A0D Share this post Link to post Share on other sites