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Command Lists Section 5-1
02: Destination
node error
01: Destination
node not in net-
work
INS indicator on
Unit
The destination node is not in
the network.
Add the destination node to the net-
work.
02: Unit miss-
ing
Instruction
control data
There is no Unit with the
specified unit address.
Check the destination unit address.
03: Third node
missing
Instruction
control data
The third node does not exist. Check the unit address of the third
node. Check the node address of
the third node in the send data for
CMND(490).
Command data Broadcasting was specified. Specify only one node for the third
node.
04: Destination
node busy
--- The destination node is busy. Increase the number of retries or
review the system so that the
destination node does not receive
so many messages.
05: Response
timeout
--- The message was destroyed
by noise.
Increase the number of retries or
test communications between
nodes to see if there is too much
noise.
Instruction
control data
The response monitor time is
too short.
Increase the length of the response
monitor time.
Error history The send/receive frame was
discarded.
Take appropriate measures based
on the error history.
03: Controller
error
01: Communi-
cations control-
ler error
Unit/Board
indicators
An error occurred in the
communications controller.
Take appropriate measures based
on the operation manuals for the
related Units/Boards.
02: CPU Unit
error
CPU Unit
indicators at
destination node
A CPU error occurred in the
destination CPU Unit.
Clear the error from the CPU Unit
based on its operation manuals.
03: Controller
error
Board indicators A response was not returned
because an error occurred in
the Board.
Check network communications
status and restart the Board. If the
problem persists, replace the
Board.
04: Unit
number error
Unit number The unit number was set
incorrectly.
Set the rotary switches correctly,
being sure the unit numbers are
within range and that each number
is used only once.
04: Service
unsupported
01: Undefined
command
Command code The Unit/Board does not sup-
port the specified command
code.
Check the command code.
02: Not
supported by
model/version
Unit model and
version
The command cannot be
executed because the model
or
version is incorrect.
Check the model number and
version.
05: Routing
table error
01: Destination
address
setting error
Routing table The destination network or
node address is not set in the
routing tables.
Register the destination network
and node in the routing tables.
02: No routing
tables
Routing table Relaying is not possible
because there are no routing
tables.
Set routing tables in the source
node, designation node, and relay
nodes.
03: Routing
table error
Routing table There is an error in the
routing tables.
Set the routing tables correctly.
04: Too many
relays
Network
configuration
An attempt was made to
send to a network that was
over 3 networks away
Reconstruct the networks or
change the routing tables so that
commands are sent within a range
of 3 networks or less.
Main code Sub-code Check point Probable cause Correction
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