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3.16 Expert Settings
Note: You can change these settings via Telnet or serial connections only, not on the Web-Manager.
These parameters should only be changed if you are an expert
and definitely know the consequences the changes might have.
TCP Keepalive time in s (1s – 65s; 0s=disable): (45)
ARP Cache timeout in s (1s – 600s) : (600) ?
CPU Performance (0=Regular, 1=Low, 2=High): (0) ?
Disable Monitor Mode @ bootup (N) ?
RS485 tx enable active level (0=low; 1=high): (0) ?
HTTP Port Number : (80) ?
SMTP Port Number : (25) ?
MTU Size (512 – 1400): (1400) ?
Enable alternate MAC (N) ?
Ethernet connection type: (0) ?
3.16.1 TCP Keepalive time in seconds
This option allows you to change how many seconds the unit will wait during a silent connection before
attempting to see if the currently connected network device is still on the network. If the unit then gets no
response, it will drop that connection.
3.16.2 ARP Cache timeout in seconds
Whenever the unit communicates with another device on the network, it will add an entry into its ARP table.
The ARP Cache timeout option allows you to define how many seconds (1-600) the unit will wait before
timing out this table.
3.16.3 Enable High Performance
This option applies to XPort-03 and greater units only. It allows you to increase the CPU performance and
utilize the higher baud rates on the serial interface (i.e. 460Kbps and 920Kbps). Increasing CPU
performance requires more power and lowers the unit’s operating temperature. The standard CPU
performance mode supports up to 230400 baud.
Note: If baud rates of 460Kbps or 920Kbps is set and the high performance mode disabled, the operation of the serial
channel would be out of the specified error tolerance thereby leading to inconsistent speed settings on the two ends of
the serial channel.
3.16.4 Disable Monitor Mode at Bootup
This option allows you to disable the Monitor Mode only during the startup sequence. This prevents all
entries into Monitor Mode except thru 'xxx' followed by 'M'. All other Monitor Mode entry sequences, e.g.
'zzz' and 'yyy', are blocked during startup.
Note: Since the NET485 is not capable of Monitor Mode at Bootup, this option is not used.
3.16.5 RS-485 TX Enable Active Level
This option allows the selection of the active level (either active high or active low) for the RS485_TXEN
signal. The default is active low.
This setting only applies if one of the configurable pins for the RS485_TXEN functionality is selected. For
the RS-485 interface mode to operate correctly, configure one of the configurable pins to RS485_TXEN. To
change the configurable pins’ settings, use DeviceInstaller or send setup records to port 77FE. On the
NET485, the only valid pin is CP0, which must be set to Active Level High.
Note: The NET485 must be configured for Active Level HIGH.
3-40 NET485 User Guide