Campbell Scientific NL120 NL120 Ethernet Module - Page 17

Telnet, Serial Server

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NL120 Ethernet Module PROGRAM 'CR1000 'FTPClient.cr1 Public Result1, Result2 BeginProg Scan (20,Sec,1,1) Result1 = FTPClient("192.168.7.85","user","password","USR:pic.jpg","USR:pic.jpg",0) Result2 = FTPClient("192.168.7.85","user","password","USR:file.html","USR:file.html",1) NextScan EndProg 6.4 Telnet Telnetting to the datalogger's IP address allows access to the same commands as the Terminal Emulator in LoggerNet Connect screen's Datalogger menu. 6.5 Ping Pinging the datalogger's IP address may be used to verify communication. 6.6 Serial Server With an NL120 attached, the datalogger can be configured to act as a serial server over the 10Base-T port. (A serial server is a device that allows serial communication over a TCP/IP port.) This function may be useful when communicating with a serial sensor over an Ethernet. 6.6.1 Serial Input The TCPOpen() instruction must be used first to open up a TCP socket. An example of this instruction is shown below. The first parameter in TCPOpen() is the IP address to open a socket to. "" means to listen on this port rather than connect. The second parameter is the port number to be used. The third parameter is buffer size. For a SerialIn() instruction that will use this connection, it gives a buffer size. The TCPOpen() instruction returns the socket number of the open connection or '0' if it cannot open a connection. socket = TCPOpen("",6784,100) Once a socket has been opened with the TCPOpen() instruction, serial data may be received with a SerialIn() Instruction. An example of this instruction is shown below. The first parameter is the string variable into which the incoming serial data will be stored. The second parameter is the socket returned by the TCPOpen() instruction. The third parameter is the timeout. The fourth parameter is the termination character. The last parameter is the maximum number of characters to expect per input. For more information on this instruction, see the CRBasic Editor Help. SerialIn(Received,socket,0,13,100) 11

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NL120 Ethernet Module
PROGRAM
'CR1000
'FTPClient.cr1
Public Result1, Result2
BeginProg
Scan (20,Sec,1,1)
Result1 = FTPClient("192.168.7.85","user","password","USR:pic.jpg","USR:pic.jpg",0)
Result2 = FTPClient("192.168.7.85","user","password","USR:file.html”,"USR:file.html",1)
NextScan
EndProg
6.4
Telnet
Telnetting to the datalogger’s IP address allows access to the same commands
as the Terminal Emulator in LoggerNet Connect screen’s Datalogger menu.
6.5
Ping
Pinging the datalogger’s IP address may be used to verify communication.
6.6
Serial Server
With an NL120 attached, the datalogger can be configured to act as a serial
server over the 10Base-T port.
(A serial server is a device that allows serial
communication over a TCP/IP port.)
This function may be useful when
communicating with a serial sensor over an Ethernet.
6.6.1 Serial Input
The
TCPOpen()
instruction must be used first to open up a TCP socket.
An
example of this instruction is shown below.
The first parameter in
TCPOpen()
is the
IP address
to open a socket to.
“” means to listen on this port rather than
connect.
The second parameter is the
port number
to be used.
The third
parameter is
buffer size
.
For a
SerialIn()
instruction that will use this
connection, it gives a buffer size.
The
TCPOpen()
instruction returns the
socket number of the open connection or ‘0’ if it cannot open a connection.
socket =
TCPOpen(
“”,6784,100
)
Once a socket has been opened with the
TCPOpen()
instruction, serial data
may be received with a
SerialIn()
Instruction.
An example of this instruction
is shown below.
The first parameter is the
string variable
into which the
incoming serial data will be stored.
The second parameter is the
socket
returned
by the
TCPOpen()
instruction.
The third parameter is the
timeout
.
The fourth parameter is the termination character.
The last parameter is the
maximum number of characters to expect per input.
For more information on
this instruction, see the CRBasic Editor Help.
SerialIn(
Received,socket,0,13,100
)
11