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OVEr‟ when the count value exceeds 99,999,999 indicating an overflow condition. Rate Module DP21 use a time interval method to calculate the rate value. The unit counts on the negative edge of the input pulses. After the programmed minimum update time elapses and the next negative edge occurs, the unit counts the number of edges that occurred during the elapsed time.
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Programming Mode Programming or Normal Mode Selection When power is applied to the DP21, it will be in Normal operating mode. To change to the Programming Mode press the „Select‟ button and hold it for 5 seconds. To change back to the normal Operating Mode just do the same as Programming Mode.
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The count scale factor Value can range from 0.0001 to 99.9999. Page 3 of 8 WISCO DP21 Manual V1.1 Wisnu and Supak Co., Ltd 102/111-112 Tessabansongkroh Rd., Ladyao, Jatujak, Bangkok 10900 Tel (662)591-1916, (662)954-3280-1, Fax (662)580-4427, www.wisco.co.th, E-mail...
All of the parameters are restored to the factory default settings when YES is selected and the front panel select button is pressed. The DP21 displays „LoAd‟ for several seconds and then returns to programming of Factory Settings parameter. Factory settings for all the programmable values are listed below.
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Scaling for Count Indication The DP21‟s scale factor is factory set to 1, to provide one count on the display for each pulse that is input to the unit. In many applications, there will not be a one-to-one correspondence between input pulses and display units.
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= 0.7812 Scaling for Rate Indication Scaling the Rate involves programming the DP21 so that input Frequency to the unit are scaled to the desired display units. Note : It is not necessary to increase the pulse information to obtain higher resolution.