Campbell NL200, Руководство пользователя

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Appendix C. NL200/201 Settings
C-4
Setting the Ethernet Speed/Duplex Configuration to “Auto” will cause the
NL200/201 to auto-configure to the faster of the two speeds and fastest duplex
setting according to the capabilities of the network.
Admin Password
To help guard against unauthorized access to the NL200/201, it is password-
protected by the Admin Password. This password will be required to gain access
to the NL200/201 via DevConfig over TCP and telnet. The default password is
nl200. If the password setting is left blank, no password is required to access the
NL200/201. After settings are saved, the new password will be in effect.
TCP Configuration Port Number
The default TCP port number for configuration via TCP is 6786. This entry
makes it possible for the user to change the port number used in TCP
configuration if desired. Typically, it is not necessary to change this entry from its
default. (range 1..65535)
C.2 RS-232 Tab
RS-232 Configuration
This setting controls which process will be associated with the RS-232 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 “RS-232 TCP
Port Number” setting. Data received on the TCP connection will be
forwarded to the RS-232 port, and data received on the RS-232 port will be
forwarded to this TCP connection.
TCP Serial Client
The device will maintain a TCP client connection with a remote server. The
IP address and port number of the remote server are configured in the settings
“TCP Serial Client IP Address” and “TCP Serial Client Port”. Data received
on the RS-232 port will be forwarded to this TCP connection, and data
received on the TCP connection will be forwarded to the RS-232 port. The
device will attempt to open a connection with the remote server and if the
connection fails to open, the device will continue to retry at an interval of 60
seconds. If data arrives on the RS-232 port when no TCP connection exists,
the device will buffer up the data (up to 1500 bytes) and immediately attempt
to open a connection to deliver the data. If the remote server closes the
connection due to error, the device will make a best effort to save any data
that was in process and re-queue it to be sent on the next successfully-opened
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
“RS-232 TCP Port Number” setting. The device will convert incoming
MODBUS/TCP frames to MODBUS/RTU and forward them to the RS-232
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.