public static int Write_Req(UInt32 cp_descr, UInt16 cref, UInt16 orderid, string Address, byte Value)
{
IsWriting = true;
int ret = -1;
IntPtr Null_Ptr = new IntPtr();
S7_WRITE_PARA write_para = new S7_WRITE_PARA();
Byte[] BValue = new Byte[1];//保证write_para和BValue的大小相等？
BValue[0] = Value;
W_Struct_Initial(ref write_para, Address, BValue);
int num = 0;
ret = s7_write_req(cp_descr, cref, orderid, ref write_para, Null_Ptr);
while (ret != 0 && num < 20)
{
ret = s7_write_req(cp_descr, cref, orderid, ref write_para, Null_Ptr);
num++;
Thread.Sleep(10);
}
if (ret == -2)
{
//MessageBox.Show(Address + "写入失败.","错误",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
IsWriting = false;
return(ret);
}
public static int Write_Req(UInt32 cp_descr, UInt16 cref, UInt16 orderid, string Address, float Value)
{
IsWriting = true;
int ret = -1;
IntPtr Null_Ptr = new IntPtr();
S7_WRITE_PARA write_para = new S7_WRITE_PARA();
Byte[] BValue = new Byte[4];
DATA_CONVERTER.Float_To_Byte(Value, ref BValue);
DATA_CONVERTER.Byte_ExRank(ref BValue, 4);
W_Struct_Initial(ref write_para, Address, BValue);
int num = 0;
ret = s7_write_req(cp_descr, cref, orderid, ref write_para, Null_Ptr);
while (ret != 0 && num < 20)
{
ret = s7_write_req(cp_descr, cref, orderid, ref write_para, Null_Ptr);
num++;
Thread.Sleep(10);
}
if (ret == -2)
{
//MessageBox.Show(Address + "写入失败.", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
IsWriting = false;
return(ret);
}
//写参数结构体初始化函数
public static void W_Struct_Initial(ref S7_WRITE_PARA W_Struct, String Mvar_name, Byte[] Mvalue)
{
W_Struct.access = S7_ACCESS_SYMB_ADDRESS;
W_Struct.var_name = Mvar_name;
W_Struct.index = 0;
W_Struct.subindex = 0;
W_Struct.address_len = 0;
W_Struct.address = null;
W_Struct.var_length = (UInt16)Mvalue.Length;
W_Struct.value = new Byte[256];
for (int i = 0; i <= (Mvalue.Length - 1); i++)
{
W_Struct.value[i] = Mvalue[i];
}
}
public static extern int s7_write_req(UInt32 cp_descr, UInt16 cref, UInt16 orderid, ref S7_WRITE_PARA write_para, IntPtr od_ptr);
