Problems about RFID Read/write station

Hi everyone,

I have problem about communication with RFID IQT-F116-R4M-V1 (Pepperl+Fuchs).

Actually, I can’t communicate with this device. I think the Command Systems in this manual is not clear. For example, I want to get advice address by command GA , but I don’t understand the legend ( what is type of this checksum? How to determine this character?) .

What should I do in order to communicate with this device? I attached my code, the manual and a picture to describe my connection.
The manual here https://goo.gl/i1GjnG

#include <SoftwareSerial.h>
#define RX        10  //Serial Receive pin
#define TX        11  //Serial Transmit pin
#define Control          2   //RS485 Direction control

#define sendCmd      HIGH
#define receiveCmd     LOW

#define Pin13LED         13
SoftwareSerial RS485(RX, TX); // RX, TX

char byteReceived;
char byteSend;
String command;

void setup()   
{
  Serial.begin(38400);
  Serial.println("Hello");
  
  pinMode(Pin13LED, OUTPUT);   
  pinMode(Control, OUTPUT);      
  RS485.begin(38400);    
}

void loop()  
{
    digitalWrite(Control, sendCmd);     //send command
    RS485.print("VE#");
    digitalWrite(Control, receiveCmd);    //stop to send
    delay(1000);

    while(RS485.available()){
    char c = RS485.read();
    Serial.print(c);
    }
}

so-do-ket-noi.png