Campbell Scientific CR1000KD CR1000 Measurement and Control System - Page 366
CRBasic Example 66., Implementation of DNP3
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Section 8. Operation Syntax DNPUpdate (DNPSlaveAddr,DNPMasterAddr) 8.6.1.2.3 Programming for Data-Acquisition As shown in CRBasic example Implementation of DNP3 (p. 366), program the CR1000 to return data when polled by the DNP3 master using the following three actions: 1. Place DNP() at the beginning of the program between BeginProg and Scan(). Set COM port, baud rate, and DNP3 address. 2. Setup the variables to be sent to the master using DNPVariable(). Dual instructions cover static (current values) and event (previous ten records) data. o For analog measurements: DNPVariable(Variable_Name,Swath,30,2,0,&B00000000,0,0) DNPVariable(Variable_Name,Swath,32,2,3,&B00000000,0,10) o For digital measurements (control ports): DNPVariable(Variable_Name,Swath,1,2,0,&B00000000,0,0) DNPVariable(Variable_Name,Swath,32,2,3,&B00000000,0,10) 3. Place DNPUpdate() after Scan(), inside the main scan. The DNP3 master is notified of any change in data each time DNPUpdate() runs; e.g., for a 10 second scan, the master is notified every 10 seconds. CRBasic Example 66. Implementation of DNP3 Public IArray(4) As Long Public BArray(2) As Boolean Public WindSpd Public WindDir Public Batt_Volt Public PTemp_C Units WindSpd=meter/Sec Units WindDir=Degrees Units Batt_Volt=Volts Units PTemp_C=Deg C 'Main Program BeginProg 'DNP communication over the RS-232 port at 115.2kbps. Datalogger 'DNP address is 1 DNP(COMRS-232,115200,1) 'DNPVariable(Source, Swath, DNPObject, DNPVariation, DNPClass, DNPFlag, 'DNPEvent, DNPNumEvents) DNPVariable(IArray,4,30,2,0,&B00000000,0,0) 366
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