DioReadCountSR

Function

Retrieves the count values on the wireless I/O device.

Format

Ret = DioReadCountSR ( Id , ChNo , ChNum , Count, Timestamp , Mode )

Parameters

Id [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the device ID retrieved from DioInit.

ChNo [ VB.NET: Short ] [ C, C++: short * ] [ C#: out short ] [ Python: ctypes.POINTER(ctypes.c_short) ]
Specify the start address of the array that stores the channel numbers for which count values are to be acquired.

ChNum [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the number of channels specified in ChNo.

Count[ VB.NET: Integer ] [ C, C++: unsigned long * ] [ C#: out uint ] [ Python: ctypes.POINTER(ctypes.c_ulong) ]
Specify the start address of the array that stores the count values.

Timestamp [ VB.NET: UShort ] [ C, C++: unsigned short * ] [ C#: out ushort ] [ Python: ctypes.POINTER(ctypes.c_ushort) ]
Specify the address of the variable to store the timestamp.

Mode [ VB.NET: Byte ] [ C, C++: BYTE ] [ C#: out byte ] [ Python: ctypes.c_ubyte ]
Specify where to refer to the input data.

Definition

Value

[Dec]

Description

DIONET_MODE_DIRECT

Refer to the input data of Terminal.

DIONET_MODE_AP

Refer to the input data of Gateway.

Return Value

Ret [ VB.NET: Integer ] [ C, C++: long ] [ C#: int ] [ Python: ctypes.c_long ]

Definition	Value [Dec]	Description
DIO_ERR_SUCCESS	0	Normal completed.
DIO_ERR_SYS_RECOVERED_FROM_STANDBY	7	Execute DioResetDevice function because the device has recovered from standby mode.
DIO_ERR_DLL_INVALID_ID	10001	Invalid ID specified.
DIO_ERR_DLL_CALL_DRIVER	10002	Not call the driver (Failure on DEVICE I/O CONTROL).
DIO_ERR_DLL_BUFF_ADDRESS	10100	Invalid data buffer address.
DIO_ERR_SYS_NOT_SUPPORTED	20001	This board couldn't use this function.
DIO_ERR_SYS_CH_NO	20105	Channel No. is outside the setting range.
DIO_ERR_SYS_CH_NUM	20106	Channel number is outside the setting range.

The others (See also: Details of Error Code)

Remarks

Retrieves the count values of the specified channels.
To acquire data, there are two methods. One is acquiring data stored in master unit, the other one is acquiring data directly from slave unit.
Please refer to the wireless I/O specification for features of each acquisition method.

For the data acquisition method, when acquiring the data stored in the master unit, you can acquire the time stamp of the data stored in the master unit.
The time stamp returns the time since the last update in seconds.
If the time stamp is longer than the update interval of the slave unit, the data from the slave unit is not reaching the master unit for some reason.
Please use it to check the validity of the data saved in the master unit.

Example

Retrieves the count values of channel 0 and channel 1.

VB.NET	Dim Ret As Integer Dim ChNo As Short Dim Count As Integer Dim Timestamp As UShort Dim Mode As Byte ChNo(0) = 0 ChNo(1) = 1 Mode = 0 Ret = DioReadCountSR( Id , ChNo , 2 , Count , Timestamp , Mode )
C, C++	long Ret; short ChNo[2] unsigned long Count[2]; unsigned short Timestamp; BYTE Mode; ChNo[0] = 0; ChNo[1] = 1; Mode = 0; Ret = DioReadCountSR( Id , ChNo , 2 , Count , &Timestamp , Mode );
C#	int Ret; short[] ChNo = new short[2]; uint[] Count = new uint[2]; ushort Timestamp; byte Mode; ChNo[0] = 0; ChNo[1] = 1; Mode = 0; Ret = dio.DioReadCountSR( Id , ChNo , 2 , Count , out Timestamp , Mode );
Python	Ret = ctypes.c_long() ChNoType = ctypes.c_short * 2 ChNo = ChNoType() CountType = ctypes.c_ulong * 2 Count = CountType() Timestamp = ctypes.c_ushort() Mode = ctypes.c_ubyte() ChNo[0] = 0 ChNo[1] = 1 Mode.value = 0 Ret.value = cdio.DioReadCountSR( Id , ChNo , 2 , Count , ctypes.byref(Timestamp) , Mode )