106 | XIO USER MANUAL | 2106424MNAB
6.1.1 Verify RMC-XIO connection (physical connection)
Depending on the connection scenario, the XIO may connect to the field network switch (star topology),
to the RMC, or to another XIO (daisy chain). Loss of physical connection is detected and displayed on the
XIO Interface Overview screen.
This procedure verifies if the RMC has successfully established a connection with the XIO. Verify
connection status from the Status and Statistics tab. This procedure describes how to check connection
status.
To ve rif y that the RMC-XIO link is established:
On the navigation tree, expand the XIO interface and select Communications.
b. Select the Status and Statistics tab (Figure 6-3).
c. Verify Communication Status displays: No Error, for both reads and writes.
d. Verify that the Poll State displays: Active, for reads. Note that the Poll State for writes may
display: Inactive, during initial configuration. This does not indicate connection failure. An
Inactive state indicates that RMC applications have not sent writes to the XIO yet. Reads are
sent periodically. Writes are sent based on the applications and their programming.
e. Verify that the Port Status is Opened for both reads and writes.
Figure 6-3: RMC-XIO connection successful
A broken connection, or one with excessive errors, displays communication status errors, poll state for
reads constantly initializing but never reaching the Active state, and port status closed. Figure 6-4
shows
the state of the status parameters when the connection is broken.
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