MODBUS RTU comunication KC868 wich Siemens S1200 RS485

[naurismaculskis]

Hello. I have siemens S1200 PLC and I try to comunicate over Modbus RTU and can't get KC868-A6 comunicate over Modbus. Maybe someone has been seting up MB master and has some example in TIA portal? Or maybe someone knows MB Master Data addr?

I was trying to find register addres in  "KC868-A series board protocol – Modbus"  file but there it says that register is 0000 which does not work. 

I added MODBUS file in attacment for  KC868 series.