Appendix Programming Information
1312
40.10 Error codes
40.10.1 Error Codes E1 to E8
Error
code
Name of
error
Operation
status of
PLC
Description and steps to take
E1
(see note)
Syntax error Stops A program with a syntax error has been written.
Change to PROG mode and correct the error.
E2
(see note)
Duplicated
output error
Stops Two or more operation results are output to the same relay. (This
error also occurs if the same timer/counter number is being
used.)
Change to PROG mode and correct the error.
This error is also detected during online editing. No changes will
be downloaded and operation will continue.
E3 Not paired
error
Stops For instructions which must be used in a pair such as jump (JP
and LBL), one instruction is either missing or in an incorrect
position.
Change to PROG mode and correct the error.
E4
(see note)
Parameter
mismatch error
Stops An instruction has been written which does not agree with system
register settings. For example, the timer/counter number setting
in a program does not agree with the timer/counter range setting.
Change to PROG mode and correct the error.
E5
(see note)
Program area
error
Stops An instruction was written to the wrong program area (main
program area or subprogram area)
Change to PROG mode and correct the error.
This error is also detected during online editing. No changes will
be downloaded and operation will continue.
E6
(see note)
Compile
memory full
error
Stops The program stored in the PLC is too large to compile in the
program memory.
Change to PROG mode and correct the error.
E7
(see note)
High-level
instruction type
error
Stops In the program, high-level F and P instructions are triggered by
the same operation result. (While the execution condition is
TRUE, F instructions are executed in every scan. P instructions
are executed only once, at the leading edge of the execution
condition.)
Correct the program so that the high-level instructions executed
in every scan and at the leading edge are triggered separately.
E8 High-level
instruction
operand
combination
error
Stops There is an incorrect operand in an instruction which requires a
specific combination of operands (for example, the operands
must all be of a certain type).
Change to PROG mode and correct the error.
NOTE
In FPWIN Pro, these errors are detected by the compiler. Therefore, they are not critical.
40.10.2 Self-Diagnostic Error Codes
Error
code
Name of error Operation
status of
PLC
Description and steps to take
E26 User's ROM error Stops Probably a hardware problem. Please contact your dealer.
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