Measurement Computing ADLIB WIN - Manual (Page 119)

Chapter 39 Counter / Timer 26-1
26.3 AL_CounterIn
Prototype C\C++
STATUS AL_API AL_CounterIn(LHLD lhld);
Visual Basic for Windows
Function AL_CounterIn(ByVal lhld As Long,) As Long
LHLD lhld
handle of the LDSD
After the Counter has been initialized, AL_CounterIn function immediately retrieves the current count of
a Counter Input port. The first time AL_CounterIn is called the return number is meaningless and returns
a value of zero; subsequent calls return the number of counts since the last call to AL_CounterIn in
PULSE_COUNTER_INCREMENTAL mode or the totalized number of counts for
PULSE_COUNTER_CUMMULATIVE mode. See the function AL_SetCtrMode for specific mode
settings.
Parameter Description
lhld Identifies the instance of the logical device subsystem.
Returns:
On success STATUS contains the current count, otherwise ERRNUM contains the negative error code that
occurred during the call.
Related Functions:
AL_SetCtrMode
AL_GetCtrMode
Supported Logical Device Subsystems:
Pci55xx
Series: CTR0, CTR1
Note that CTR0, CTR1 Counters are referenced in the user manual as CNTR0/1.