Campbell Scientific CR3000 CR3000 Micrologger - Page 246
PulseCountReset Instruction
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Section 7. Installation 'Data Tables 'Table output on two intervals depending on condition. 'note the parenthesis around the TriggerVariable AND statements 'Status table datafilldays field is low DataTable(TwoInt,(int_fast AND TimeIntoInterval(0,5,Sec)) OR (int_slow AND _ TimeIntoInterval(0,15,sec)),-1) Minimum(1,batt_volt,FP2,0,False) Sample(1,PTemp,FP2) Maximum(1,counter(1),Long,False,False) Minimum(1,counter(1),Long,False,False) Maximum(1,deltaT,FP2,False,False) Minimum(1,deltaT,FP2,False,False) Average(1,deltaT,IEEE4,false) EndTable 'Main Program BeginProg Scan(1,Sec,0,0) PanelTemp(PTemp,250) Battery(Batt_volt) counter(1) = counter(1) + 1 'thermocouple measurement TCDiff(AirTempC,1,mV20C,1,TypeT,PTemp,True ,0,250,1.0,0) 'calculate the difference in air temperature and panel temperature deltaT = airtempC - PTemp 'when the difference in air temperatures is >=3 turn LED on 'and trigger the data table's faster interval If deltaT >= 3 Then PortSet(4,true) int_fast = true int_slow = false Else PortSet(4,false) int_fast = false int_slow = true EndIf 'Call Output Tables CallTable TwoInt NextScan EndProg 7.8.15 PulseCountReset Instruction PulseCountReset is used in rare instances to force the reset or zeroing of CR3000 pulse accumulators (see Measurement Inputs (p. 60) ). PulseCountReset is needed in applications wherein two separate PulseCount() instructions in separate scans use the same pulse-input channel. While the compiler does not allow multiple PulseCount() instructions in the same scan to use the same channel, multiple scans using the same channel are allowed. PulseCount() information is not maintained globally, but for each individual instruction occurrence. So, if a program needs to alternate between fast and slow 246
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