Function
Sets the counting direction. (Up count/Down count)
Format
Ret = CntSetCountDirection ( Id , ChNo , Dir )
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.
Dir
[ C, C++ : short] [Python: ctypes.c_short]
Specifies the counting direction. Select the counting direction from the
following defined values.
Definition |
Value |
Description |
CNT_DIR_DOWN |
0 |
Down count |
CNT_DIR_UP |
1 |
Up count |
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
Up count (1)
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 counting direction for the
specified channel.
The setting in this function is effective after the counter starts.
Example
C, C++ |
Ret = CntSetCountDirection
( Id , ChNo , Dir ); |
Python |
Ret = ccnt.CntSetCountDirection
( Id , ChNo , Dir ) |
See Also