Omron SYSMAC LINK C1000H-SLK21-V1 System Manual page 141

Network Troubleshooting
LNK indicator flashing
LNK indicator still not lit
INS indicator not lit
• Check whether local node number is greater than the maximum node number
setting. If it is, lower local node number or increase maximum node number.
• Check whether the same node number has been assigned twice.
• In coaxial cable systems, check whether the Terminators are connected prop-
erly.
• Check whether all cables are connected properly.
• Check whether the cables transmit properly.
• Confirm that a data link table has been created. If not, do so.
• Check whether the data link tables of nodes which are currently in the data link
match that of the local node. If not, stop data link operations and modify the
data link table either in the local node or the nodes which are currently linked.
• If the data link tables do match, check whether an EEPROM error has
occurred. If so, investigate EEPROM error causes and remedies.
• When the data link tables have been generated automatically, confirm that the
node number of the local node is within the range of node numbers set auto-
matically. If not, either lower the node number of the local node so that it is
within the range, or change the automatic settings in AR 07 to include the local
node.
• Check whether the node number of the local node is included in the common
link parameters in the data link tables of those nodes currently in the data link. If
not, stop data link operations and modify the data link tables of either the active
nodes or of the local node.
Section 8-2
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