DC541_FREQ_FAST¶
| Parameter | Value |
|---|---|
| Library_File_Name | DC541_AC500_V12.lib |
| Firmware | V1.2, DC541 firmware: V1.3 |
| Type | Type_Function_Block_History |
| Group | Counters |
The function block DC541_FREQ_FAST is used to measure times, frequencies and rotational speeds with a resolution of 1 µs.
It is able to measure frequencies from 0-50000 Hz (50 kHz).
The function block works like DC541_FREQ, but it reaches a resolution of 1us DC541_FREQ.
Restrictions:
- The function block is only allowed once per DC541 and only for channel 0.
- It occupies the resources of the first 4 inputs, which cannot be used for other purposes.
- The inputs C0..C3 must be connected in parallel.
This function block has to be called cyclically, one time per second at least.
It always measures the time and frequency from one positive edge to the next positive edge.
The output NEW indicates that new measurement results are available.
The device DC541 must be configured as counting device (counter mode). Channel CH must be configured for frequency measurement.
The function block has an integrated visualization which can be used to control all function block functions in parallel to the user program, if input EN_VISU = TRUE Visualizations.