Gx6138GetChannel

Returns the state of the specified relay.

Gx6138GetChannel (nHandle, nChannel, pnState, pnStatus)

Name	Type	Comments
nhandle	SHORT	Handle to a GX6138 board.
nChannel	SHORT	Specifies the relay number. Can be 1 to 38.
pnState	LPSHORT	Returned relay state. Closed = 1 and Open = 0.
pnStatus	LPSHORT	Returned status: 0 on success, negative number on failure.

Use the Gx6138GetGroupChannels to retrieve the status of all channels of the specified group.

The following example return the status of relay 1:

Gx6138GetChannel(nHandle, 1, &nStateClose, &nStatus);

if (nState==1)

printf("Relay 1 is Closed");

else

printf("Relay 1 is Open");