Schneider M340 Modbus Serial communication

[Dan0218]

Hi everyone, im still new at programming and need your help with my

This is my first time to program a VFD(altivar320 ATV320U04M2C). I will not be using NOE module. Im using my BMXP432020 cpu so i will be using the normal rj45 cable from PLC to my VFD. I read that if not using noe module, i must use the read_var and write_var block in unity pro(also my first time to use this block). I just need to give a start command to my motor via modbus serial and read vfd frequency. i already wrote the logic but im not pretty much sure if i did it correctly so i need some expert advise from you guys.

I attached some screenshots of the logic and communication parameters which i think schnieder provided.

ModbusReadParameters = array[0..3] of int
InputFromVfd = array[0..15] of int
ModbusWriteParameters = array[0..3] of int
CMD_Write = array[0..15] of int
AG_01 = Start command

Thank you

 

[chud]

First of you wont be able to start the drive by just setting one bit to 1. You have to read the status word first. Then according to the info the drive is providing (healthy, ready to start etc) you must enable then start etc. I will look for the code schneider provides for starting a atv71 in modtcp ip and post it here. The code will function exactly the same

 

[chud]

pm me your email address. The file is to big to share on here. I will mail it to you