Troubleshooting
Extended Local I/O
5-40
516
0x0204
UNCONNECTED REQUEST TIMED OUT
The ControlNet cable from the originating node to
the target node is broken or disconnected.
Fix and/or reconnect the ControlNet cable.
The target node is not powered.
Supply power to the target node.
The originator’s and/or the target’s node number
is greater than UMAX.
Reconfigure the ControlNet network so that the
originator’s and target’s node numbers are less
than or equal to UMAX.
The target node is too busy to respond.
Reduce the number of unconnected requests to
the target node.
769
0x0301
OUT OF BUFFER MEMORY
The maximum number of connections to/from this
node has been exceeded.
• If this is an I/O connection, reduce the number
of I/O connections.
• If this is a MSG instruction, reduce the number
of MSG instructions.
• If this is a CIO instruction, reduce the number
of CIO instructions.
770
0x0302
SCHEDULED BANDWIDTH NOT AVAILABLE
There are too many words scheduled for
transmission.
Edit the I/O map table to reduce the number of
scheduled words.
The network update time (NUT) is too small.
Increase the network update time (NUT).
The originator’s and/or the target’s node number
is greater than SMAX.
Reconfigure the ControlNet network so that the
originator’s and target’s node numbers are less
than or equal to SMAX.
Decimal Code Hex. Code
Error Message
Explanation/Possible Cause(s)
Possible Corrective Action(s)
ControlNet Errors