NL121 Ethernet Module
10
BeginProg
Scan (5,Sec,6,0)
PanelTemp (PanelTemperature,250)
Battery (BatteryVoltage)
If not Route(4094) then Socket = TCPOpen ("192.168.7.231",6785,0)
SendVariables (Result1,Socket,-1,4094,0000,100,"Public","Callback",dummy1,1)
CallTable CLBK1
NextScan
EndProg
6.1.2
Datalogger-to-Datalogger Communication
Communication between dataloggers is possible over TCP/IP. In order to do this,
a socket must be opened between the two dataloggers. This is done using the
TCPOpen()
instruction or using the
PakBus/TPC Client
setting. Note that only
one datalogger should be set up to open the connection. The socket opened by the
TCPOpen()
instruction or the
PakBus/TPC Client
setting is then used by the
instructions performing datalogger-to-datalogger communication.
The example program below gets the battery voltage from a remote datalogger and
sends its panel temperature to the remote datalogger. The remote datalogger is at
IP address 192.168.7.125 and port 6785 is used for communication between the
dataloggers. The remote datalogger must have its battery voltage stored in a
public variable,
BattVolt
. It must also have a Public variable declared,
PTemp_Base
. This will be used to store the panel temperature of the base
datalogger.
PROGRAM
'CR1000
'DL-to-Dl_Comms_1.cr1
'Send this program to CR1000 #1
'Remote CR1000 #2 has PBA = 2, IP addr = 192.168.7.125, and port 6785
Public BattVolt,, BattVolt_Remote
Public PTemp
Public Result1, Result2
Dim Socket as LONG
DataTable (Test,1,-1)
DataInterval (0,12,Sec,10)
Minimum (1,BattVolt,FP2,0,False)
EndTable
BeginProg
Scan(2,Sec,0,0)
Socket = TCPOpen(“192.168.7.125”,6785,0)
BatteryVoltage(BattVolt)
PanelTemp(PTemp,250)
