Counter retrieval - using a counter deadband

You can set a deadband for counter retrieval to better handle reporting of rates and quantities. For example, setting a counter deadband can help to:

• Distinguish between counter resets and rollovers.

• Filter out counter reversals.

The counter deadband is the percentage of the full range of the counter.

For example, if you set the counter deadband to be 10, then any counter reset that occurs within the top 10% of the range is assumed to be a rollover and is counted as such.

For a reversal, you might have a conveyor belt carrying boxes that are counted as they pass by a station. If a jam occurs, you might reverse the conveyor belt to clear it, resulting in the counter decrementing and then incrementing again. In this case, a counter deadband of 10 would discard any duplicate counts within 10% of the range starting from the point of reversal. Only one reversal can be detected until the rollover occurs.