Rockwell Automation 1756-LSC8XIB8I ControlLogix Low-speed Counter Module - Manual (Page 51)

Rockwell Automation Publication 1756-UM536A-EN-P - April 2012 51
Configure the Module Chapter 4
3. Complete the fields as described in the table below and click Apply.
Field Description Configuration Tag
Calculate Average Frequency Over Type the number of pulses to use to calculate average frequency. This value is also
used to calculate average pulse width. For more information about how average
frequency and average pulse width are calculated, see
page 12 .
Valid values = 0…1, 000
Default = 10
Counter[x].FreqAveragePulseCount
Frequency Calculate Timeout Type the amount of time in milliseconds the counter will wait between pulses before
it sets the input frequency to zero.
Valid values = 0…10, 000 ms
Default = 1,000 ms Counter[x].FreqTimeout
Enable Filter for this Counter Check the checkbox to enable filtering. When filtering is enabled, transitions at a
counter must remain in the new state for a configured length of time before the
module begins counting. You can configure the filter time on the Input Configuration
tab. Counter[x]FilterEn
Window 0 Defined In From the pull-down menu, choose the method window 0 will use to evaluate
incoming pulses.
Valid values:
• Counts (default)
• Frequency
• Average Frequency Counts:
Counter[x].Window0UsesFreq = 0
and
Counter[x].Window0FreqAverage = 0
Frequency:
Counter[x].Window0UsesFeq = 1
and
Counter[x].WindowFreqAverage = 0
Average frequency:
Counter[x].Window0UsesFeq = 1
and
Counter[x].WindowFreqAverage=1
Window 1 Defined In From the pull-down menu, choose the method window1 will use to evaluate
incoming pulses.
Valid values:
• Counts (default)
• Frequency
• Average Frequency Counts:
Counter[x].Window1UsesFreq = 0
and
Counter[x].Window1FreqAverage = 0
Frequency:
Counter[x].Window1UsesFeq = 1
and
Counter[x].WindowFreqAverage = 0
Average frequency:
Counter[x].Window0UsesFeq = 1
and
Counter[x].WindowFreqAverage=1