zulfizie

No I have the plc and drive already. I test them earlier day but nothing happens. So i thought mybe wrong in my program that why I just use simulation for checking.

Its shows that my instructions unsupported when i use simulation 😓

Sorry the baud rate is right 19200  

I'm sure 8 bits even parity and 1 stop bits but not sure about the baud rate. I'm don't use that D8402 register in my command. Should I put that in every command for check the error ?

Thank for that. Can u check my coding below ? I set plc to be master then inverter slave. I try made function run, stop and read frequency from inverter. Inverter I use optidrive e3 inverter .  https://drive.google.com/file/d/0B59GD8Xz8aGMMFozU1dIdW51Rlk/view?usp=drivesdk https://drive.google.com/file/d/0B59GD8Xz8aGMeDR5eWtkWjRZWk0/view?usp=drivesdk https://drive.google.com/file/d/0B59GD8Xz8aGMeDR5eWtkWjRZWk0/view?usp=drivesdk

Yes I already check that but not quite understand. Can you explain more at topic modbus master read/write instruction . Especially when to use command code like example H1 / K100 /H0F / D100 and so on. I cannot figure out what actually function of that code . Thank you

Hi can anyone help me to undestand more about modbus RTU between fx3u with optidrive e3 ?? I'm using rj45 with fx3u 485adp-Mb for the connection. Then specially in making the ladder program in Gx Works 2. I'm stuck understand the command code there. I'm first time using this. Please help me. Thank you.