CntSetDigitalFilter

Function

Sets the digital filter value.

Format

Ret = CntSetDigitalFilter ( Id , ChNo , FilterValue )

Parameters

Id [ C, C++ : short] [Python: ctypes.c_short]
Specifies the device ID retrieved from CntInit.

ChNo [ C, C++ : short] [Python: ctypes.c_short]
Specifies the channel number which you want to set.

FilterValue [ C, C++ : short] [Python: ctypes.c_short]
Sets the digital filter value in Coefficient.
Please refer to "Specifications based on devices" for the digital filter values.

Return Value

Ret [ C, C++ : long] [Python: ctypes.c_long]

Definition	Value	Description
CNT_ERR_SUCCESS	0	Normal Complete
CNT_ERR_DLL_INVALID_ID	10001	Invalid ID is specified.
CNT_ERR_DLL_CALL_DRIVER	10002	Driver cannot be called (failed in ioctl).
CNT_ERR_DLL_MODE	10100	Invalid mode setting.
CNT_ERR_SYS_MODE	20100	Invalid mode setting.
CNT_ERR_SYS_CH_NO	20201	Channel number is outside the range.

The other errors: (See also: Details of Error Code)

Initial Value

Coefficient=0

CPSN-CNT-3201I2

When used in combination with CPSN-MCB271, the initial value immediately after power-on depend on the settings configured via the web browser.

Remarks

Specifies the digital filter for the specified channel.
The setting in this function is effective after the counter starts.

Specifications based on devices

CPSN-CNT-3201I2

Coefficient	Digital filter value
0h	Not used
1h	0.1usec
2h	0.2usec
3h	0.4usec
4h	0.8usec
5h	1.6usec
6h	3.2usec
7h	6.4usec
8h	12.8usec
9h	25.6usec
Ah	51.2usec
Bh	102.4usec
Ch	204.8usec
Dh	409.6usec
Eh	819.2usec
Fh	1.6384msec
10h	3.2768msec
11h	6.5536msec
12h	13.1072msec
13h	26.2144msec
14h	52.4288msec

CNT-3204IN-ETH

CNT-3204IN-USB

CNT-3204MT-LPE

CNT-3208M-PE

CNT32-4MT(LPCI)

CNT32-8M(PCI)

CPI-CNT-3201I

Coefficient	Digital filter value
0h	Not used
1h	0.1usec
2h	0.2usec
3h	0.4usec
4h	0.8usec
5h	1.6usec
6h	3.2usec
7h	6.4usec
8h	12.8usec
9h	25.6usec
Ah	51.2usec
Bh	102.4usec
Ch	204.8usec
Dh	409.6usec
Eh	819.2usec
Fh	1638.4usec

CNT24-4(PCI)H

CNT24-4D(PCI)H

CPS-CNT-3202I

CPSN-CNT-3201I

Coefficient	Digital filter value
0h	0.1usec
1h	6.5usec
2h	25.7usec
3h	32.1usec
4h	204.9usec
5h	211.3usec
6h	230.5usec
7h	236.9usec
8h	819.3usec
9h	825.7usec
Ah	844.9usec
Bh	851.3usec
Ch	1024.1usec
Dh	1030.5usec
Eh	1049.7usec
Fh	1056.1usec

Example

C, C++	Ret = CntSetDigitalFilter(Id, ChNo, FilterValue);
Python	gin-left: 0;">Ret = ccnt.CntSetDigitalFilter(Id, ChNo, FilterValue)