Campbell Scientific NL240 Wireless Network Link Interface - Manual (Page 61)

Appendix C. NL240 Settings
RS-232 Modbus Timeout
This setting determines how long the MODBUS/TCP to MODBUS/RTU
gateway will wait for an answer from the MODBUS slave device(s) attached to
the RS-232 port. If no answer is received within the timeout period, the
MODBUS/TCP server will reply to the MODBUS/TCP client with error code
0x0B (Target Device Failed to Respond). (milliseconds)
RS-232 TCP Serial Client IP Address
This setting specifies the IP address of the outgoing TCP Serial client
connection that the device should maintain. If the connection fails, the device
will retry until the connection succeeds. No entry specifies that no client
connection will be made.
RS-232 TCP Serial Client Port
This setting specifies the TCP port of the outgoing TCP Serial Client
connection. (range 1..65535)
C.4 CS I/O Tab
CS I/O Configuration
This setting controls which process will be associated with the CS I/O port.
The following values are defined:
TCP Serial Server
The device will listen for an incoming TCP connection from a remote
client. The port number of the listening connection is specified in the “CS
I/O Service Port Number” setting. Data received on the TCP connection
will be forwarded to the CS I/O port, and data received on the CS I/O port
will be forwarded to this TCP connection.
PakBus
This port uses the PakBus® protocol.
Modbus/TCP Gateway
The device will listen for incoming MODBUS/TCP connections from a
remote client. The port number of the listening connection is specified in
the “CS I/O Service Port Number” setting. The device will convert
incoming MODBUS/TCP frames to MODBUS/RTU and forward them to
the CS I/O port. The device will wait for a response from the
MODBUS/RTU device and forward the response back to the remote
MODBUS/TCP client over the established TCP connection.
Disabled
This port will not be used.
CS I/O Service Port Number
To communicate with a TCP/IP server, the client application must open a
socket to that server. The socket of a specific server is uniquely identified by
an IP address of the host where the server is running and a port number
associated with the server application on that host. This entry is where the port
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