ADAM-5000 Series I/O Module User's Manual

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I/O Module IntroductionSetting Initial Counter ValueIn order to utilize the alarm function, users have to set a high-alarm limitvalue and/or a low alarm limit value, and a initial value to fulfill therequirements for a basic alarm setting.Figure 60: Sending Alarm Signal (recommended settings)Figure 61: Sending Alarm Signal (settings not recommended)Overflow ValueOverflow value is the number of times the counter value exceeds theMax/Min values you specified. When the counter value exceeds Maximumvalue, the overflow value increases; when the counter value goesunder Minimum value, the overflow value decreases. Besides, when thecounter value runs beyond the range of Max/Min value, it will continuecounting from the initial value. Furthermore, if users want to check thecounter value to see if it is higher or lower than the Max/Min value, theycan use the "ReadOverflowFlag" library to gain readout of the overflowvalue.P.68 ADAM-5000 Series I/O Module User’s Manual
I/O Module IntroductionGetting the Totalizer ValueIf users want to get the actual counter value, a formula such as followscan facilitate an easy calculation from the initial counter value, overflowvalue and current counter value:Vtol = {|Vini - Vmin (or Vmax) |+ 1} x |Vvf| + |Vini - Vcur|Vtol : totalizer valueVini : initial counter valueVmin : min. counter value = 0 (fixed value)Vmax : max. counter value = 2 32 = 4,294,967,295 (fixed value)Vvf: overflow valueVcur : current counter valueExample:If the initial value =10, overflow value =4, min. value = 0, currentcounter value = 3, the totalizer value could be calculated asTotalizer value = {|10 - 0| + 1} x| 4 |+ |10 -3| = 51ADAM-5000 Series I/O Module User’s Manual P.69
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