KEYENCE Visual KV Series - Manual (Page 340)

7.2 Serial Communication
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7
Chapter 7 Serial Communication
Subroutines are nested to four levels
or more.
FOR/NEXT instructions are nested to
eight levels or more.
Five levels or more of interrupts
occurred simultaneously.
MPS/MPP instructions are nested to
eight levels or more.
Content in RAM was erased. All data
in data memory and current values of
counters in the KV were cleared.
Scan time exceeds 300 ms.
Attempt was made to operate a KV
base unit which has no programs
stored.
Hardware error was detected in a KV
base unit.
Error code Description Cause Remedy
00 No error
10 CALL nest error
11 FOR nest error
12 INT nest error
13 MPS nest error
20 Memory error
30 Scan timer error
40 NO PROGRAM
50 SND/RTN failure
51 Division by zero
52 Address error
53 Invalid instruction
54 Watchdog timer error
7.2.6 Error Code List
When a "Checking KV PLC error" command (?E) is transmitted, the KV sends back
the error code. The following list shows the description, cause, and remedy for each
error code.
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.
Turn the KV off once and turn it on.
Register data from the beginning.
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.
Write a program into KV.
Turn off the power for the KV, and
then turn it on again. If the cause of
the error is not removed, the KV may
be faulty. Contact your nearest
KEYENCE office.
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