ETS Wierenga Posted January 10, 2022 Report Share Posted January 10, 2022 Hi Everyone, I bought the SM35-j-r20 for a new project. I have experience with the unistream models. With that, it was easy to connect via ethernet or USB. But with the Samba (visilogic) I have problems to connect with the plc. I get an communication drive error (206). I use a glodX GXMU-1200 USB to serial converter, with Prolific driver (I've tried different versions) . My baudrate is set to 57600. My OS is Win 11. I hope you can help me. Thank you in advance. Francis Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted January 10, 2022 MVP 2023 Report Share Posted January 10, 2022 First step - check - is it USB-RS232 device in working condition. Connect pin 2 to pin 3 of GXMU-1200 USB to serial converter. Use terminal program for transmit and receive some character. If 2 and 3 pin connected - you can see the same message in send and recieve window. If this test = OK. Read manual on page 11 https://www.unitronicsplc.com/wp-content/uploads/2015/12/SMXX-J-T20_R20_DOC17015-A4_02-15.pdf You must check 3 wire from converter to PLC: RS232 GND(5) ---- 0V refrence pin 2 or 5 PLC. RS232 RX(2) ----- TXD pin 3 PLC RS232 TX(3) ----- RXD pin 4 PLC If it is OK. Check in Visilogic - is it com port number = USB -COM converter com number. Last tip - Uninstall Visilogic and run Visilogic installation as Administrator. Link to comment Share on other sites More sharing options...
AlexUT Posted January 13, 2022 Report Share Posted January 13, 2022 Hi, Set baud rate to 115200, 8, N, 1. Timeout 10 sec, retry 3. Does communication works now? Link to comment Share on other sites More sharing options...
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