Section
9-2
Status Information and Troubleshooting
128
Indicators
Probable cause
Probable remedy
LNK
y
Lit
Data link operating normally.
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Flashing
When manual setting was used, there is an error in
the data link table.
Refer to 5-2-2 Manual Setting and reset the data
link table.
Not lit
For manual setting, there are no data link tables set
for the local node.
Set data link tables for the local node.
For automatic setting, the startup node is not set to
participate in the data links.
Stop the data links, reset the parameters in the
startup node’s DM Area, and then restart the data
link.
The Controller Link Support Board cannot become
the start-up node for automatic setting, so set on
the PC to which the Controller Link Unit is mounted.
For details refer to the Controller Link Units
Operation Manual (W309).
The following explanation describes how to use the LNK indicator when the data
links cannot be stopped. Stopping the data links depends on the Controller Link
Support Board operating normally and participating in the Network. Read the
above explanations before attempting to stop operation.
Note Stop the data link from the node at which the LNK indicator is flashing (indicating
active data links). Data links cannot be stopped from nodes which do not have
active data links.
Indicators
Probable cause
Probable remedy
LNK
y
Not lit
Data link stopped normally.
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9-2
Status Information and Troubleshooting
The Controller Link Support Board contains status information which reflects the
current status of communications and the Board. This status information can be
read using the STATUS READ or DATA LINK AREA READ FINS command. The
cause of the error can be found by reading the status information.
This section explains the contents accessed by the ClkGetNetworkStatus func-
tion and tells how to troubleshoot error information obtained.
9-2-1 Troubleshooting with the ClkGetNetworkStatus Function
The following network status is read by ClkGetNetworkStatus().
Type
Variable name
Contents
BYTE
byConnectionMethod
Wired/optical discrimination, transmission path form, etc.
Bit
––: Not specified.
Maximum number of nodes supported
00: 32 nodes
01: 64 nodes
Transmission path
0: Token bus
1: Token ring
Connection type
0: Wired
1: Optical ring
Note
When optical and optical ring connections are combined, the maxi-
mum number of nodes supported will be given as 62 nodes for an opti-
cal ring connection even if the maximum number of nodes is 32.
BYTE
byMyNodeAddr
Local unit address
Stores the local unit address set for the Controller Link Board.
Data Links Cannot be
Stopped
