Campbell Hausfeld SDM-CD16AC Manual Do Utilizador

'Dimension Variables 
Public src(32) 
Dim i, count, mask(16) 
 
'Program 
BeginProg 
for i=1 to 16 
 

mask(i) = 2^(i-1) 

 next 

i 

 Scan(20,msec,2,0) 
 

 

count = count + 1 

 

 

for i=1 to 32 

 

 

 

src(i) = count AND mask(((i-1) MOD 16) +1) 

  next 

i 

  SDMCD16AC(src(),2,1) 
 NextScan 
EndProg  

 

The example is written for the CR10(X) Measurement and Control Module.  
The program concepts presented are the same for the CR23X, 21X, and CR7 
dataloggers with minor program code changes. 

In this example, the SDM-CD16AC is used to control the temperature between 
23

° and 28°C in each of 5 greenhouses.  In each green house the SDM-

CD16AC controls a heating unit, a refrigerating unit, and an air mixing fan 
according to the following conditions. 

Heating unit:  Activate when temperature < 23.5

°C.  Deactivate when 

temperature > 25.5

°C 

Cooling unit:  Activate when temperature > 27.5

°C.  Deactivate when 

temperature < 24.5

°C 

Mixing fan:  Activate whenever the heating or cooling units are activated.  
Activate for 5 minutes out of every 15 minutes. 

The program assumes the temperature measurements have been made, and the 
average temperature for each greenhouse is computed and residing in Input 
Locations 1 through 5.