User manual

Appendix C. HC2S3 Digital Communications
C-4
Sensor Wiring:
E2-05XX-MOD Cable MD485 CR1000
Blue A
Red B
Green 12V
Grey/Yellow G
Clear Ground Symbol
If the Rotronic cable includes brown and white wires (voltage
signals for temperature and humidity), CSI recommends “capping”
them with PN #27749 or equivalent insulated caps to prevent the
possibility of shorting.
Connect the CS I/O port of MD485 to CS I/O port on CR1000 with an SC12
cable.
The following example CR1000 program configures the CS I/O port as
COMSDC7 using the SerialOpen instruction, sends the RDD (Read Values)
command “|{F00RDD}CR” to the probe, and parses temperature and relative
humidity values from the data string returned by the probe.
Example CR1000 Program:
'CR1000 Program
'Declare variables
Public SerialIndest As String * 100
Dim String_1 As String
Const CRLF=CHR(13)+CHR(10)
Dim HC2S3_Split(17) As String * 40
Alias HC2S3_Split(2) = RH_Str 'RH string.
Alias HC2S3_Split(6) = TempC_Str 'Temp string.
Alias HC2S3_Split(17) = HC2S3_SN_Str 'HC2S3 serial number string.
Public TempC, RH, NBytesReturned
DataTable (Table1,1,-1)
DataInterval (0,15,Min,10)
Average (1,TempC,FP2,False)
Sample (1,RH,FP2)
EndTable
BeginProg
SerialOpen (ComSDC7,19200,0,0,100) 'Configure CS I/O port
String_1 = "|{F00RDD}"+CRLF 'RS485 command to send data
Scan (5,Sec,0,0)
SerialFlush (34)
SerialOut (ComSDC7,String_1,0,2,100) 'Send command to send data
Delay (0,500,mSec)
'Get data from probe
SerialInRecord (ComSDC7,SerialIndest,&H6464,0,&H3B48,NBytesReturned,01)
'Parse RH and temp from string
SplitStr (HC2S3_Split(),SerialIndest,";",17,7)
NOTE