8: Channel Mode: Channel Configuration
XPress™ DR Industrial Device Server User Guide
54
Channel (port) password
(2)
1
Hard disconnect
(3)
0
Disable hard disconnect
1
State LED off with connection
(4)
1
Disconnect with EOT (^D)
(5)
1
1. The XPress DR will send the "Terminal Type" upon an outgoing connection.
2. A password is required for a connection to the serial port from the network.
3. The TCP connection will close even if the remote site does not acknowledge the disconnection.
4. When there is a network connection to or from the serial port, the state LED will turn off instead of blink.
5. When Ctrl D or Hex 04 are detected, the connection is dropped. Both Telnet mode and Disconnect with
EOT must be enabled for Disconnect with EOT to function properly. Ctrl D will only be detected going
from the serial port to the network.
6. DTR hardwired to +12VDC. This option is disabled in the XPress DR.
Flush Mode (Buffer Flushing)
Using this parameter, you can control line handling and network buffers with connection startup
and disconnect. You can also select between two different packing algorithms.
FlushMode (00) ?
Note:
Table F-1 Binary to Hexadecimal Conversion Table
Table 8-9 Flush Mode Options
Function
7
6
5
4
3 2 1
0
Input Buffer (Serial to Network)
Clear with a connection that is initiated from the
XPress DR to the network
1
Clear with a connection initiated from the network
to the XPress DR
1
Clear when the network connection to or from the
XPress DR is disconnected
1
Output Buffer (Network to Serial)
Clear with a connection that is initiated from the
XPress DR to the network
1
Clear with a connection initiated from the network
to the XPress DR
1
Clear when the network connection to or from the
XPress DR is disconnected
1
Alternate Packing Algorithm (Pack Control)
Enable
1
Pack Control
Two firmware-selectable packing algorithms define how and when packets are sent to the
network. The standard algorithm is optimized for applications in which the unit is used in a local
environment, allowing for very small delays for single characters while keeping the packet count
low. The alternate packing algorithm minimizes the packet count on the network and is especially
useful in applications in a routed Wide Area Network (WAN). Adjusting parameters in this mode
can economize the network data stream.