User manual

TD990200-0ME

N1 Communications Are Occasionally Unreliable

1. Ethernet communications may be unreliable. Use IPSTAT or

XPING to check for Ethernet errors. If transmit or receive

errors are indicated, check with the network administrator for

the Ethernet network to determine if they have been

experiencing Ethernet downtime or excessively heavy network

traffic.

2. ARCNET communications may be unreliable. Check the

ARCNET cables for any subnets that are experiencing problems.

3. Metasys N1 communications may be timing out. If you have

eliminated the other possible causes of this problem, contact

Field Support Services for assistance.

Data Cannot Be Viewed on OWS Across Network

The Metasys Operator Workstation (OWS) can be improperly config-

ured so that it transmits broadcast ARCNET messages, but not point-

to-point ARCNET messages. The symptoms are as follows:

• No nodes come online at the OWS.

• The OWS cannot open any focus windows that require data

from a remote node.

• The OWS is online to the rest of the system, but cannot access

any data over the network.

• The Metasys Ethernet Router statistic screen shows broadcast

traffic from the OWS but not any normal message traffic.

• Other nodes may transmit Retry messages to the OWS.

These problems are caused by an IRQ conflict at the OWS. The

normal IRQ setting for the ARCNET card is 7. Some system BIOSes

will conflict with this setting. To resolve the conflict, change the

ARCNET IRQ to a different IRQ setting that is not currently being

used.