User`s manual

NPort 6000 Series User’s Manual Configuring Serial Port Operation Modes
7-4
ATTENTION
When Max connection is greater than 1, the NPort 6000 will use a multi connection application
(i.e., 2 to 8 hosts are allowed access to the port at the same time). When using a multi connection
application, the NPort 6000 will use the serial communication parameters as defined here in the
web console, and all hosts connected to the port must use identical serial settings. If one of the
hosts opens the COM port with different serial settings, data will not be transmitted properly.
Ignore jammed IP (default=No): This option determines how the port will proceed if multiple
hosts are connected and one or more of the hosts stops responding as the port is transmitting data.
If you select No, the port will wait until the data has been transmitted successfully to all hosts
before transmitting the next group of data. If you select Yes , the port will ignore the host that
stopped responding and continue data transmission to the other hosts.
Allow driver control (default=No): This option determines how the port will proceed if driver
control commands are received from multiple hosts that are connected to the port. If No is selected,
driver control commands will be ignored. If Yes is selected, control commands will be accepted,
with the most recent command received taking precedence.
Command by command operation (default = Disable): Command by command mode can only
support one request and one response from each host. When the NPort 6000 receives a command
from any host on the Ethernet, the NPort 6000 will store the command in the buffer. Commands
will be sent to the serial ports on a FIFO (first in first out) basis. See the diagram below:
Host B COM5
Host A COM3
PLC
: from Host A
: from Host B
Once the PLC responds, the NPort 6000 will save that response to its buffer, assume that the
response is correct, and then send the command back to the originator of the command. The NPort
6000 can respond in place of the PLC the next time it receives a request for the same command.
Secure (default=No): If you select Ye s , data sent through the Ethernet will be encrypted with SSL.