Sir,,

I am trying to communicate between sinamics g120 drive and modscan using G120P CU230P-2 HVAC.My modscan software is a lisenced version.I am able to communicate with 3 out of 7 drives by setting parameters p2020 as 19200,p2021as 1,p2030 as 2, p2040 as 0.I am using same cable and serial convertor for the all application. My scheme is like two wire from cu230 will go to seriel convertor and other end is, 9 pin port of convertor,is connected to pc's com port.If communication is steady i am getting a red led steady indication. If communication is not there, led will blink.

I am also gettinga message" an invalid response to modbus query."on modscan software.I am attaching the back up of drive. Pleasesuggest your ideas.problemis still there