'CR1000 Series Datalogger 'date: 'program author: RC Beeson. Const off = 0 Const on = -1 Const run = 1

Transcription

1 This program for a CR1000 measuring 16 load cells from multiplexed through a AM16/32b multiplexer (in 4x4 mode) and controlling 16 independent irrigation valves using a SDM-CD16AC module. Comments of details are indicated in italic. Bold face type indicates CRBasic commands Line numbers in italic, underlined and highlighted in yellow and correspond to discussion of this program in the Agriculture Water Management manuscript entitled: Suspension Lysimeter Systems for Quantifying Water Use and Modulating Water Stress for Crops Grown in Organic Substrates 'CR1000 Series Datalogger 'date: 'program author: RC Beeson Const off = 0 Const on = -1 Const run = 1 'Declare Public Variables Public batt_volt, lys_mass(16), mass_500(16), mass_2200(16), CD16cntl(16), mass(16), Corr_dailyETa(16) Public Total_ETa(16), Post1pm_massinc(16), Totalirr(16), ETA_1pm(16), preirr_mass(16), cumirrmass(16) Public Partirrvol(16), middaydelay As Long, irrneeded(2), irr_on(2), StoredETa(16), Trigger(16), CF(16) Public lcmult(16), lcoffset(16), switch(7)as Boolean, Flag(12)As Boolean, 'Declare Other Variables Dim PEta2400(16), lysloopcount, i As Long Dim cd16status(2),lcnum(16), 'Act as logic switches Alias switch(1) = readlysimeters Alias switch(2) = irrindicator Alias switch(3) = shutdownswitch Alias switch(4) = startupswitch Alias switch(5)= midday_signal Alias switch(6) = endirrcyc Alias switch(7) = irrbypass 'Define Data Tables ' Stores lysimeter masses every half hr DataTable (halfstor,true,-1) DataInterval (0,30,Min,-1) Sample (16,lys_mass(),IEEE4) EndTable

2 'Calculates mean load cell millivolts DataTable (meanmass,flag(3),3) Average (16, mass(),ieee4,0) EndTable 'Stores daily values DataTable (dailysum,flag(7),400) Sample (16,Total_ETa(),IEEE4) Sample (16,mass_500(),IEEE4) Sample (16,Post1pm_massinc(),IEEE4) EndTable 'Irrigation shutdown subroutine Sub irrshutdown cumirrmass(i)= lys_mass(i) - preirr_mass(i) If cumirrmass(i) < 0 Then cumirrmass(i) = 0 If cd16cntl(i) = run AND partirrvol(i) >= cumirrmass(i) Then cd16cntl(i) = run Else cd16cntl(i) = off MaxSpa (irr_on,16,cd16cntl(1)) 'Override setting to prevent irrigation events longer than 15 min. 'Should be changed if "Overirrigate" is on and irrigation is working well If TimeIntoInterval (15,30,Min) Then If irr_on(1) = run Then flag(4) = true If shutdownswitch = on Then cd16cntl(i) = off flag(12) = true 'Resets variables for next irrigation If irr_on = 0 Then

3 EndSub shutdownswitch = off startupswitch = false irrindicator = off irrbypass = off If midday_signal = on Then endirrcyc = on 'Irrigation startup subroutine Sub irr_start If partirrvol(i) >= 0.2 Then cd16cntl(i) = run Else cd16cntl(i) = off startupswitch=off irrindicator = on irrneeded = off irrbypass = on flag(2) = true EndSub 'Main Program BeginProg 'Calibration constants for load cells. Where mult = slope and offset is constant value 'NOTE: calibration must be in kg, not grams!!! lcmult(1)=1 : lcoffset(1)=0 lcmult(2)=1 : lcoffset(2)=0 lcmult(3)=1 : lcoffset(3)=0 lcmult(4)=1 : lcoffset(4)=0 lcmult(5)=1 : lcoffset(5)=0 lcmult(6)=1 : lcoffset(6)=0 lcmult(7)=1 : lcoffset(7)=0 lcmult(8)=1 : lcoffset(8)=0 lcmult(9)=1 : lcoffset(9)=0 lcmult(10)=1 : lcoffset(10)=0 lcmult(11)=1 : lcoffset(11)=0 lcmult(12)=1 : lcoffset(12)=0 lcmult(13)=1 : lcoffset(13)=0 lcmult(14)=1 : lcoffset(14)=0 lcmult(15)=1 : lcoffset(15)=0 lcmult(16)=1 : lcoffset(16)=0

4 Scan (10,Sec,0,0) Battery (batt_volt) 'Allow for bypassing program, such as when tinkering with it or when changing load cells, etc ' and you don't want non-useful data. Flag 1 has to be "on" (lit) for program to run. If flag(1) = true Then ' When Flag 2 is on, bypasses normal 5 cycle to get average 'good for recalibration or to check things. Needed for irrigation control. If flag(2) = true Then readlysimeters = on lysloopcount=4 'measures load cells attached to AM in Dff channel 1 and Excite channel 1, returns mass 'LINE 130 If readlysimeters = on Then lysloopcount = lysloopcount + 1 PortSet (4,1 ) SubScan(50,msec,16) PulsePort(5,20000) lcnum = lcnum +1 BrFull (mass(lcnum),1,mv7_5,-1,vx1,1,2500,false,true,20000,_60hz,lcmult(lcnum),lcoffset(lcnum)) NextSubScan CallTable meanmass PortSet(4, 0) lcnum = 0 'LINE 141 'When lysloopcount = 5, by either instance measure or 5 rep mean, shuts down load cell reading and calls for mean mass of each lysimeter. 'LINE 145 If lysloopcount = 5 Then flag(3) = true CallTable meanmass 'LINE 148 'Retrives average mass per lysimeter from meanmass table and puts it in array lys_mass(). 'LINE 151 If flag(3) = true Then GetRecord(lys_mass(), meanmass,1) 'LINE153 'After average mass retrieved, resets conditions to initial values for next lysimeter read.

5 If flag(3)= true AND lysloopcount = 5 Then flag(3) = false lysloopcount = 0 readlysimeters = off If irrbypass = off Then flag(2) = false 'Reads lysimeter every half hour and stores data in table named halfstor 'LINE 165 If TimeIntoInterval (29,30,Min) Then readlysimeters = on 'LINE 167 'LINE 169 If TimeIntoInterval (0,30,min) Then CallTable halfstor 'LINE 171 'Stores 5 am masses for ETa and irrigation volume determinations 'LINE 174 If TimeIntoInterval (300,1440,Min) Then For i=1 To 16 Step 1 mass_500(i)=lys_mass(i) 'LINE 178 'Stores 10 pm mass for irrigation volume and ETa determination 'LINE 181 If TimeIntoInterval (1320,1440,Min) Then For i=1 To 16 Step 1 mass_2200(i) = lys_mass(i) 'LINE 185 'At midnight, calculates cumulative daily ETA and setup irrigation for rest of night 'LINE 188 If TimeIntoInterval (0, 1440, min) Then flag(7) = true If Flag(7) = true Then For i= 1 To 16 Step 1 PEta2400(i) = mass_500(i) - mass_2200(i) If PEta2400(i)< 0 Then PEta2400(i) = 0

6 Total_ETa(i) = PEta2400(i) + Post1pm_massinc(i) 'LINE 197 'LINE 199 Corr_dailyETa(i) = Total_ETa(i) * CF(i) StoredETa(i) = StoredETa(i) + Corr_dailyETa(i) If StoredETa(i) > Trigger(i) Then 'LINE 20 Else 'LINE 202 Totalirr(i) = StoredETa(i) StoredETa(i) = 0 Totalirr(i) = 0 'LINE 211 partirrvol(i) = Totalirr(i)* 'Sets limit for 1/3 irrigation volume to 10 kg, if reached or exceeded, Underirrigation flag lites up 'LINE 216 If partirrvol(i) >= 10 Then partirrvol(i) = 10 flag(5) = true 'LINE 221 MaxSpa (Irrneeded,16,partirrvol(1)) CallTable Dailysum 'LINE 216 'Setup for initial mass for nighttime irrigation 'LINE 226 preirr_mass(i) = lys_mass(i) flag(7)= false flag(9) = true 'Sets up for 1 am irrigation If TimeIntoInterval (60,1440,Min) Then For i= 1 To 16 Step 1 preirr_mass(i) = lys_mass(i)

7 MaxSpa (irrneeded,16,partirrvol(1)) 'Sets up for 2 am irrigation If TimeIntoInterval (120,1440,Min) Then preirr_mass(i) = lys_mass(i) MaxSpa (irrneeded,16,partirrvol(1)) 'LINE 245 'Sets up for midday irrigation. 'To stop midday irrigation, change flag(8) = true to flag(8) = false 'LINE 249 If TimeIntoInterval (781,1440,Min) Then flag(8) = true If flag(8) = true Then preirr_mass(i) = lys_mass(i) ETA_1pm(i) = mass_500(i) - preirr_mass(i) 'Puts on 1/2 of ETA at midday. Can be reduced for slow drydown partirrvol(i) = ETA_1pm(i)* 0.5 'Limits midday irrigation to 6 kg. You may need to increase if trees are big If partirrvol(i) > 6 Then partirrvol(i) = 6 flag(5) = true MaxSpa (irrneeded,16,partirrvol(1)) midday_signal = on flag(8)= false flag(10) = true 'LINE 270 'Irrigation shutdown cycle 'LINE 272 MaxSpa (cd16status(),16,cd16cntl(1)) If cd16status(1)=run Then shutdownswitch = on

8 If irrindicator = on AND shutdownswitch = on Then Call irrshutdown 'LINE 279 Irrigation startup cycle 'LINE 281 If irrneeded(1)> 0.2 Then startupswitch = on If startupswitch = on Then Call Irr_start Flag(11) = true 'LINE 288 'solenoid control SDMCD16AC (CD16cntl(),1,0) cd16status(1) = off 'Post-1 pm irrigation mass increase and cleanup If midday_signal = on AND endirrcyc = on Then middaydelay = middaydelay +1 If middaydelay = 11 Then readlysimeters = on NextScan EndProg If middaydelay = 17 Then Post1pm_massinc(i) = lys_mass(i) - preirr_mass(i) midday_signal = off endirrcyc = off middaydelay = 0 irrbypass = off midday_signal = off