Pakscan IIE Master Station MODBUS communication

Hi, I have question about the ROTORK MASTER STATION MODBUS communication
Our ROTORK MASTER STATION was communicate with SCHNEIDER PLC using the modbus protocol, now we are going to replace the SCHNEIDER PLC by SIEMENS PLC, the problem is we don't have the modbus exchange table, so the question is: can you give me the method to extract the modbus adresses that were used for this communication from the ROTORK MASTER STATION or give me the method to configure new Modbus addresses in ROTORK MASTER STATION.