KEYENCE Visual KV Series - Manual (Page 285)

7.5 KV Mode Programming KV-300 Series Only
KV
-300
KV-10/80
Chapter 7 KV-L2 Serial Interface Module
1-261
1
7
E2 Program
unregis-
tered • "M1" was transmitted with no
program stored in the KV-300
CPU.
• Reading of timer/counter was
attempted.
• Register a program into the
KV-300 CPU.
• Check the program for the
timer/counter number being
used and specify it.
E3 CPU fault • Hardware error was detected
in a KV-300 CPU.
• Turn the power to the KV-300
OFF and then ON again. If
the cause of the error is not
corrected, the CPU may be
faulty. Contact your nearest
KEYENCE office.
E4 Write-
protected • Attempt was made to change
the preset value of a counter,
timer, or CTC in a write-
protected program.
• Write-enable the program,
and change the preset value.
E5 CPU error • "M1" was transmitted before
an error message was
cleared from the KV-300.
• Clear the error message from
the KV-300 CPU, and remove
the cause of the error.
Error code list
Error codes included in responses to the KV-300 CPU error check command (?E)
as well as error descriptions, causes of error, and remedies are listed below.
Error
Code Description Cause Remedy
00 No error — —
10 CALL nest
error • Subroutines are nested to four
levels or more.
• These errors may occur when
a program is executed. Check
the program while paying
particular attention to usage of
subroutines and the INT
instruction, and restore the
program accordingly.
11 FOR nest
erro • FOR-NEXT instructions are
nested to eight levels or more.
12 INT nest
error • Five levels or more of inter-
rupts occurred simultaneously.
13 MPS nest
error • MPS/MPP instructions are
nested to eight levels or more.
20 Memory
erased • Contents of RAM are erased.
All data in data memory and
current values of counters in
the KV-300 CPU are cleared.
• Check data in data memory
and current values of counters,
and re-enter correct data. The
KV-300 CPU returns to normal
operation after the error is
cleared.
30 Scan time
error • Scan time exceeds 300 ms. • Check the program again.
• Be sure that there is no
excessive repetition using the
FOR-NEXT loop.
• Be sure that an interrupt is not
executed at a higher rate.
40 NO PRO-
GRAM • An attempt was made to
operate the KV-300 CPU with
no program stored.
• Write a program into the
KV-300 CPU.
50 SND/RTN
failure • Hardware error was detected
in a KV-300 CPU.
• Turn the power to the KV-300
OFF and then ON again. If
the cause of the error is not
removed, the KV-300 CPU
may be faulty. Contact
nearest KEYENCE office.
51 Division by
zero
52 Address
error
53 Invalid
instruction
54 Watchdog
timer error
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