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Plc communication problems: controlnet – Rockwell Automation 2711E-xxxx PanelView Operator Terminals User Manual User Manual

Page 143

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8–9

Troubleshooting PanelView Terminals

Publication 2711E-821 – January 1998

Consult the following table to identify PLC communication
problems over the ControlNet network. At run time, the ## appears
at the terminal as the decimal station address of the node to which
the error applies.

Problem

Cause

What to do:

CNet## : Access denied to remote station,
improper privilege.

The indicated station is a PLC that is
loading a program over the network.

Wait for the transfer to complete.

The indicated station is a PLC that is
FAULTED.

Check PLC configuration and correct if
necessary.

CNet## : Remote station does not match the
configured PLC.

The device type of the remote station does
not match that configured in PanelBuilder.

Check that the node definitions in your
application file are configured with the
correct device type.

CNet## : Remote station has not replied within
specified timeout period.

Network traffic is too heavy for configured
timeout.

Increase the configured timeout for the
indicated station.

Cable problem.

Check for a loose connection or damaged
cable at the indicated station.

CNet## : Remote station is in Program mode.

PLC is in Program or Remote Program
mode.

Change PLC to Run mode.

CNet## : Station address is already in use by
another device.

The PanelView terminal cannot
communicate with the indicated station
because the terminal has been configured
with a station address that is already in use
on the ControlNet network.

Select another station address.

CNet## : Tag address is not valid for this PLC.

The terminal is trying to access a tag whose
address does not exist at the indicated PLC.

Check that the tag addresses in your PLC
are correct and the PLC has been correctly
configured.

CNet## : Unable to communicate with remote
station.

The indicated remote station does not exist
on the ControlNet network.

Check that the remote station is present and
active at the indicated station address.

The PanelView terminal cannot
communicate with the indicated station
because the terminal has been configured
with a station address that is already in use
on the ControlNet network.

Select another station address.

Cable problem.

Check for a loose connection or damaged
cable at the indicated station.

PLC Communication
Problems: ControlNet