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Appendix B. Carrier DataLink Device Error Response
The following notes are provided from the protocol specification.
Message Explanation Action
#1 Invalid
Command
The last command sent to the DataLink
device is not recognized.
Check the spelling of the
command and verify that it
contains the required
parameters.
#2 Invalid or Non-
Existent Table
The specified table does not exist in the
specified element.
Check the spelling of the table
name(s). If using a WV or RV
command; verify that the table
contains the specified
variables.
#3 Level II
Communications
Error
A Communication error has occurred
due to other activity on the CCN
communication bus, a system element
failure, or an incorrect address. The
command will not be executed.
Verify the COMM2 connector
is not disconnected and retype
the command.
#6 Device Not
Configured
The specified system element’s bus and
the element number were not found in
the DTP-CONFG table.
Verify that the correct bus and
element number have been
entered in the DTP-CONFG
table corresponding to the
device number.
#7 Variable Does
Not Exist
The variable does not exist in the
specified table.
Check the spelling of the
variable name and verify that
the CCN variable exists in the
specified system element.
#8 Invalid Data The data was in an incorrect format. Verify the format of the data.
#9 Access
Restricted
An attempt was made to read or write to
a table or variable type that is not
supported by the DataLink device.
Check variable.
#10 Limits
Exceeded
The value that was typed is outside the
specified variable’s upper or lower limits
Verify the limits and adjust the
force value.
#11 Alarms Not
Available
There are no alarms currently in the
alarm buffer.
Reissue the command at later
time or adjust the alarm
priority level.
#12 Cannot Force
Variable
The CCN system element does not
allow write access to the specified
variable.
Choose different variable.
#13 Parameter Not
Found
The 8-character point (variable) name
used in the RT or WT command does
not exist.
Check the spelling of the point
(variable) name and verify that
the point name exists in the
specified system element.
#14 Level II
Communications
NACK
The command was accepted but not
understood by the specified system
element, an attempt was made to write
to or read a variable with a higher force
level, or an attempt was made to write or
read from a UT203 controller.
Retype the command after
checking the force priority and
after verifying that the correct
bus and element number is
entered in the DTP-CONFG
table.