Function
Sets the slave ID.
Format
ret = modbus_set_slave( ctx , slave )
Parameters
ctx [ VB.NET： IntPtr ] [ C, C++： modbus_t * ] [ C#： IntPtr ] [ Python： ctypes.POINTER(modbus_t) ]
Specify the pointer to the libmodbus structure.
slave[ VB.NET： Integer ] [ C, C++： int ] [ C#： int ] [ Python： ctypes.c_int ]
Specify the slave ID.
Return values
ret [ VB.NET：Integer ] [ C, C++： int ] [ C#： int ] [ Python： ctypes.c_int ]
If the function succeeds, 0 is returned. If the function fails, -1 is returned, and the following error is stored in errno.
Definition |
Description |
EINVAL |
Slave ID is invalid. |
Remarks
Sets the slave ID for the specified Modbus structure.
Example
Sets slave ID 1.
VB.NET |
Dim ret As Integer Dim ctx As IntPtr ret = modbus_set_slave(ctx, 1)
|
C, C++ |
int ret; modbus_t *ctx; ret = modbus_set_slave(ctx, 1);
|
C# |
int ret; IntPtr ctx; modbus.SetSlave(ctx , 1); |
Python |
ret = ctypes.c_int ctx = ctypes.POINTER(modbus_t) ret = modbus.modbus_set_slave(ctx, 1) |