CntSelectChannelSignal

Function

Selects the external signal source(TTL/Photocoupler/Differential). Supports multi-processing.

Format

Ret = CntSelectChannelSignal ( Id , ChNo , SigType )

Parameters

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

ChNo [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the channel number for setting.

SigType [ VB.NET: Short ] [ C, C++: short ] [ C#: short ] [ Python: ctypes.c_short ]
Specify the external signal source. The external signal source is selected from the following DefinitionValue.

Definition	Value	Description
CNT_SIGTYPE_ISOLATE	0	Photocoupler insulation
CNT_SIGTYPE_TTL	1	TTL
CNT_SIGTYPE_LINERECEIVER	2	Differential

Return Value

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

Definition	Value	Description
CNT_ERR_SUCCESS	0	Normality completion
CNT_ERR_SYS_RECOVERED_FROM_STANDBY	7	Execute the function CntResetDevice to return from the standby mode.
CNT_ERR_DLL_INVALID_ID	10001	Invalid ID was specified.
CNT_ERR_DLL_CALL_DRIVER	10002	CNT driver can't be called (Failed in the device I/O control).
CNT_ERR_DLL_MODE	10100	Invalid mode setting.
CNT_ERR_SYS_BOARD_EXECUTING	20002	Cannot use while by another device works.
CNT_ERR_SYS_MODE	20100	Invalid mode setting.
CNT_ERR_SYS_CH_NO	20201	Channel number is out of range.

The others: (See also: Details of Error Code)

Initial Value

CNT24-4(PCI)H	TTL (SigType = CNT_SIGTYPE_TTL)
CNT24-4D(PCI)H	TTL (SigType = CNT_SIGTYPE_TTL)
CNT-3204MT-LPE CNT32-4MT(LPCI)	TTL (SigType = CNT_SIGTYPE_TTL)
CNT-3208M-PE CNT32-8M(PCI)	TTL (SigType = CNT_SIGTYPE_TTL)
CNT-3204IN-USB	Photocoupler insulation (SigType = CNT_SIGTYPE_ISOLATE)
CPS-CNT-3202I CPSN-CNT-3201I	Photocoupler insulation (SigType = CNT_SIGTYPE_ISOLATE)

Remarks

Specifies the external signal source of specified channel.
This function becomes effective, when the counter is started.

Specifications based on devices

CNT24-4(PCI)H	Usable SigType is Photocoupler insulation or TTL.
CNT24-4D(PCI)H	Usable SigType is Differential or TTL.
CNT-3204MT-LPE CNT32-4MT(LPCI)	Usable SigType is TTL.
CNT-3208M-PE CNT32-8M(PCI)	Usable SigType is Differential or TTL.
CNT-3204IN-USB	Usable SigType is Photocoupler insulation.
CPS-CNT-3202I CPSN-CNT-3201I	Usable SigType is Photocoupler insulation.

Please refer the hardware manual to know more detail about Signal type for each device.

Example

Sets the external signal source of channel 0 to photocoupler insulation.

VB.NET	Dim Ret As Integer Ret = CntSelectChannelSignal ( Id , 0 , CNT_SIGTYPE_ISOLATE )
C, C++	long Ret; Ret = CntSelectChannelSignal ( Id , 0 , CNT_SIGTYPE_ISOLATE );
C#	int Ret; Ret = cnt.SelectChannelSignal ( Id , 0 , (short)CcntConst.CNT_SIGTYPE_ISOLATE );
Python	Ret = ctypes.c_long() Ret.value = ccnt.CntSelectChannelSignal ( Id , 0 , ccnt.CNT_SIGTYPE_ISOLATE )