Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it.
Namespace:NationalInstruments.DAQmx Assembly:
NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.40.49302
Syntax
publicenumCOConstrainedGenerationMode
PublicEnumerationCOConstrainedGenerationMode
Members
Member name
Value
Description
Unconstrained
14708
Counter has no restrictions on pulse generation.
FixedHighFrequency
14709
Pulse frequency must be above 7.63 Hz and cannot change while the task runs. In this mode, the duty cycle has 8 bits of resolution.
FixedLowFrequency
14710
Pulse frequency must be below 366.21 Hz and cannot change while the task runs. In this mode, the duty cycle has 16 bits of resolution.
Fixed50PercentDutyCycle
14711
Pulse duty cycle must be 50 percent. The frequency can change while the task runs.
Remarks
Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it. Use this enumeration to get or set the value of ConstrainedGenerationMode.