Function
Retrieves the timeout period between bytes in Modbus communication.
Format
ret = modbus_get_byte_timeout( ctx , to_sec , to_usec )
Parameters
ctx [ C : modbus_t * ] [ Python : ctypes.POINTER(modbus_t) ]
Specify the pointer to the libmodbus structure.
to_sec [ C : uint32_t * ] [ Python : ctypes.POINTER(ctypes.c_uint32) ]
Specify the pointer to store the part of the timeout period that is more than 1 second (in unit of sec).
to_usec [ C : uint32_t * ] [ Python : ctypes.POINTER(ctypes.c_uint32) ]
Specify the pointer to store the part of the timeout period that is less than 1 second (in unit of usec).
Return values
ret [ C : int ] [ Python : ctypes.c_int ]
If the function succeeds, 0 is returned. If the function fails, -1 is returned.
Remarks
The timeout setting between bytes in the same message in Modbus communication can be retrieved.
Example
Retrieves the timeout period.
C |
int ret; modbus_t *ctx; uint32_t to_sec; uint32_t to_usec; ret = modbus_get_byte_timeout(ctx, &to_sec, &to_usec);
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Python |
ret = ctypes.c_int ctx = ctypes.POINTER(modbus_t) uint32_to_sec = ctypes.c_ulong uint32_to_usec = ctypes.c_ulong ret = modbus.modbus_get_byte_timeout(ctx, sec, to_usec) |