KEYENCE KV Series - Manual (Page 186)

Appendices
2-162
Appendices
Error message Cause Countermeasures
Corresponding CTH
instruction is not
found. Although the CTC instruction is
used, the corresponding CTH
instruction is not included in the
program. Include the corresponding CTH
instruction in the program before the
END instruction.
Corresponding
instruction is
undefined. Although contacts of timers and
counters are used, the correspond-
ing instructions are not present in
the program. Include the corresponding instruc-
tions in the program before the END
instruction.
Unusable in subrou-
tine. There are unusable instructions
included in a subroutine. Change the program and use another
method.
Model code is
incorrect. The mnemonic of an instruction
word is incorrect. (This error often
occurs when a file created by a
commercial editor or word proces-
sor is opened and the mnemonic list
is edited.) Confirm the specifications of the
instruction using the manual or the
help function.
First line is illegal.
Mnemonic is illegal.
First operand is
illegal.
Second operand is
illegal.
Third operand is
illegal.
After mnemonic is
unnecessary.
After first operand is
unnecessary.
After second operand
is unnecessary.
After third operand is
unnecessary.
Code file was not
generated.
Ladder diagram can’t
be drawn. Because instructions are sorted
incorrectly, they cannot be
compiled into a ladder diagram. Confirm the specifications of the
instructions, and correct the program.
Number of instruc-
tions is too large.
Previous connecting
block is not found.
Following connecting
block is not found.
Instructions are not
paired.
Usage of CON
instruction is incorrect.
Connection of multiple
input elements is illegal.
Output elements can’t be
connected in parallel.
Input element connected
to output line.
Output element
connected to bus.
Termination element not
connected to output line.
Block has too long
parallel connection.
Because there are too many
instructions in a parallel connected
block, it cannot be compiled into a
ladder diagram. Change the circuit to reduce the
number of instructions in the parallel
connected block.
Lines in block exceeds
maximum number. A block in the ladder diagram
exceeds 100 lines. Change the program so that no more
than 100 lines are included per block.
No connection. An instruction symbol does not exist
on a path between buses. Include an instruction symbol on a path
between buses.
Illegal short-circuiting. Two points are short-circuited when
they should not be. Never short-circuit them.
Illegal parallel
connection. Blocks are not correctly parallel
connected. Change the circuit so that they are
correctly parallel connected.
Illegal connection. The instruction symbol connection
method is incorrect. Change the circuit so that the symbol
is correctly connected.
KVSKA Appendix.P65 08.3.11, 11:26 AM 162