Omron C200HW-CLK21 Operation Manual page 312

Troubleshooting Using Indicators
Indicators
RUN ERC ERH INS
Lit --- --- Not lit Terminating resistance is
Probable cause
not set correctly.
Cables are not connected
correctly.
The node address is larger
than the maximum node
address set for the network
parameters.
No other nodes exist.
No nodes have been set as
polling nodes.
The set baud rate is differ-
ent to other nodes (Wired
Unit).
Section 9-1
Probable remedy
Turn ON the terminating
resistance at the nodes at
both ends of the Network
and turn it OFF at all other
nodes.
Check the cable connec-
tions and reconnect cor-
rectly.
Either reset the maximum
node address using the
Controller Link Support
Software or reset the node
address to below the maxi-
mum.
Make sure that 2 or more
nodes exist within the Net-
work.
Refer to 8-1-2 Setting the
Polling and Polled Nodes
and set at least one polling
node. (Controller Link
Units should normally be
set as polling nodes.)
Refer to SECTION 4 Prep-
arations for Communica-
tions and set all nodes on
the network to the same
baud rate.
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