Pinging Tcp/Ip Ethernet Interfaces On The Network; Terminals Tab - GE PACSystems RXi User Manual

Note:
Status Address: The Status Address is the reference memory location for the Ethernet
Interface status data. The Ethernet Interface automatically maintains 16 LAN Interface Status
(LIS) bits in this location. The Status address can be assigned to valid %I, %Q, %R, %AI,
%AQ or %W memory. The default value is the next available %I address.
Note:
Note:
Length: This is the total length of the Ethernet Interface status data. This is automatically set
to either 80 bits (for %I and %Q Status address locations) or 5 words (for %R, %AI, %AQ and
%W Status address locations).
For definitions of the Ethernet interface Status bits, refer to Ethernet Interface Status Bits on
page 191.
4.3.2

Pinging TCP/IP Ethernet Interfaces on the Network

PING (Packet InterNet Grouper) is the name of a program used on TCP/IP networks to test
reachability of destinations by sending them an ICMP echo request message and waiting for
a reply. Most nodes on TCP/IP networks, including the PACSystems Ethernet Interface,
implement a PING command.
You should ping each installed Ethernet Interface. When the Ethernet Interface responds to
the ping, it verifies that the interface is operational and configured properly. Specifically it
verifies that acceptable TCP/IP configuration information has been downloaded to the
Interface.
Determining if an IP Address is Already Being Used
Note:
a device that is configured with the same IP address if it is temporarily off the network.
It is very important not to duplicate IP addresses. To determine if another node on the
network is using the same IP address:
1. Disconnect your Ethernet Interface from the LAN.
2. Ping the disconnected Interface's IP address. If you get an answer to the ping, the
chosen IP address is already in use by another node. You must correct this situation by
assigning a unique IP address.
4.3.3

Terminals Tab

This configuration tab is displayed only when the Ethernet interface's Variable Mode property
is set to True. When Variable Mode is selected, the Ethernet Status bits are referenced as I/O
variables that are mapped to the Ethernet status bits on this configuration tab.
The use of I/O variables allows you to configure the Ethernet interface without having to
specify the reference addresses to use for the status information. Instead, you can directly
associate variable names with the status bits. For more information, refer to Section
7.1.3, I/O Variables.
GFK-2816F
If the isolated network is connected to another network, the IP addresses 10.0.0.1
through 10.0.0.255 must not be used and the subnet mask, and gateway IP address
must be assigned by the network administrator. The IP addresses must be assigned
so that they are compatible with the connected network.
Do not use the 80 bits configured as Ethernet Status data for other purposes or data
will be overwritten.
If the Ethernet interface's Variable Mode property is set to true, the Status Address
parameter is removed from the Settings tab. Instead, Ethernet Status references
must be defined as I/O variables on the Terminals tab.
This method does not guarantee that an IP address is not duplicated. It will not detect
August 2015
Chapter 4. Configuration
69