Function
Retrieves the response timeout period in Modbus communication.
Format
ret = modbus_get_response_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, and the following errno is set.
Definition |
Description |
EINVAL |
CTX is invalid. |
Remarks
Retrieves the response timeout period in Modbus communication.
Example
Retrieves the timeout period.
C |
int Ret; modbus_t *ctx; uint32_t to_sec; uint32_t to_usec; Ret = modbus_get_response_timeout(ctx, &to_sec, &to_usec);
|
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_response_timeout(ctx, sec, to_usec) |