Advantech ADAM-5511 Manual page 168

Write_User_RAM
Syntax:
void write_user_ram(unsigned int index, unsigned int data)
Description:
Write value to user RAM
Parameter
Index
data
Return value:
None
Example:
void main()
{
unsigned int Value;
//Read address 42004
Vaule = read_user_ram(3);
//Write "value" into address 42001
Description
The index of Modbus memory address
0~511 mapping to Modbus address
42001~42512
The value you would like to write into the
address