The Period Meter type is a counter that uses up to 2 fast inputs.
Each TM3 HSC expansion module can have up to 2 Period Meter type high speed counters configured.
Use the Period meter counting mode to:
oDetermine the duration of an event
oMeasure the time between 2 events
oSet and measure the execution time for a process
Performance is determined by the Filter value, used to reduce the bounce effect on the input.
For more information about the bounce filter, refer to Dedicated Features.
A maximum error applies to each measurement.
This table shows the maximum error for each configurable value of Resolution:
|
Configured Resolution (μs) |
Maximum Error (μs) |
|---|---|
|
0.1 |
0.5 |
|
1 (default |
0.5 |
|
100 |
3 |
|
1000 |
3 |
For example, if the configured resolution is 0.1 μs, a generated pulse of 1 μs is displayed between 5 (0.5 μs) and 15 (1.5 μs).
