User manual

TD990200-0ME
27
unique subnet address. The Metasys DDL files must use the
correct subnet addresses.
3. All of the Metasys devices on one ARCNET segment need to
have the same subnet address. Although ARCNET hubs and
links result in multiple ARCNET segments, for the purposes of
the Metasys Ethernet Router, it is all considered one subnet.
4. Time-critical control strategies should not cross Ethernet
segments.
Debugging ARCNET Failures
Use standard Metasys debugging tools to diagnose and correct
suspected ARCNET failures. The Metasys Ethernet Router displays
message statistics. The router should increment the ARCNET
message counter (broadcast) when it is connected to any ARCNET
NCM or workstation. This counter will increment even if multiple
subnets are not defined. If this counter does not increment, there
may be a problem with the router itself.
Debugging Router Failures
Several of the difficulties discussed in this section may be caused by
a global DDL file that is inaccurate or has not been downloaded.
Therefore, before going on, verify that the current global file is
up-to-date and fully downloaded.
Metasys Ethernet Router Does Not Run When Booted
The ROUTER.CFG file should be examined for errors.
Status Screen Indicates Failure Number 10
One or more Metasys Ethernet Routers were offline when this router
started. Normal communication resumes when the other routers
come online.
Status Screen Indicates Failure Number 9
This is caused by the customer’s existing LAN Router being offline.
Verify that the existing LAN Router IP address is correct. Check
with the customer’s LAN manager to determine the condition of the
existing LAN Router.
Status Screen Indicates Invalid Messages
1. An operator tried to access an NCM defined in the DDL, but the
NCM is on a subnet that has not been defined in the