Counter Output >> General Properties >> More >> Advanced >> Constrained Generation Mode
| Data Type: | int32 |
| Description: | 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. |
Valid values
| DAQmx_Val_Unconstrained | 14708 | Counter has no restrictions on pulse generation. |
| DAQmx_Val_FixedHighFreq | 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. |
| DAQmx_Val_FixedLowFreq | 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. |
| DAQmx_Val_Fixed50PercentDutyCycle | 14711 | Pulse duty cycle must be 50 percent. The frequency can change while the task runs. |
You can get/set/reset this property using:
DAQmxGetCOConstrainedGenMode
DAQmxSetCOConstrainedGenMode
DAQmxResetCOConstrainedGenMode