Function
Connects to a Modbus slave device.
Format
ret = modbus_connect( modbus_t *'ctx' );
Parameters
ctx [ VB.NET： IntPtr ] [ C, C++： modbus_t * ] [ C#： IntPtr ] [ Python： ctypes.POINTER(modbus_t) ]
Specify the pointer to the libmodbus structure.
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.
Remarks
Connects to a Modbus slave device. Please use this function after making settings related to communication with modbus_new_tcp or modbus_new_rtu.
Example
Connects to the Modbus slave according to the structure specified by ctx.
VB.NET |
Dim ret As Integer Dim ctx As IntPtr ret = modbus_connect(ctx)
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C, C++ |
int ret; modbus_t *ctx; ret = modbus_connect(ctx);
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C# |
int ret; IntPtr ctx; ret = modbus.Connect(ctx);
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Python |
ret = ctypes.c_int ctx = ctypes.POINTER(modbus_t) ret = modbus.modbus_connect(ctx)
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