Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 333

Error Error name Error details and cause
code
3511H Operation error • The PID operation result is greater than
the maximum value or lower than the
minimum value.
3512H Operation error • The output upper limit value is lower than
the output lower limit value.
3513H Operation error • The input variation alarm set value or
output variation alarm set value is
outside the allowable range.
3514H Operation error • The auto tuning result in the step
response method is abnormal.
• The deviation at start of auto tuning is
150 or less.
• The deviation at end of auto tuning is 1/3
or more of the deviation at start of auto
tuning.
3515H Operation error • The operation direction estimated from
the measured value at the start of auto
tuning in the step response method was
different from the actual operation
direction of the output during auto tuning.
3516H Operation error • Because the set value fluctuated during
auto tuning in the step response method,
auto tuning was not executed correctly.
3517H Operation error • The output set value upper limit for auto
tuning is lower than the lower limit.
3518H Operation error • A value outside the allowable range was
set to the PV threshold for auto tuning.
3519H Operation error • Operation is not performed normally
because devices occupied by the PID
instruction were overwritten.
351AH Operation error • The auto tuning time is longer than
necessary.
350BH Operation error • The variation of the measured value is
too small compared with the output
value.
350CH Operation error • The auto tuning time is longer than
necessary.
350DH Operation error • The auto tuning time is longer than
necessary.
3580H Operation error • An instruction that cannot be used in an
interrupt routine program is used.
Action
• The operation is continued with the
maximum or minimum value.
• Calculation is continued with the output
upper limit value and output lower limit value
transposed.
• The operation is continued without alarm
output.
• Check the measured value and target value,
and then execute auto tuning again.
• Correct the relationship among the target
value, output value for auto tuning, and the
measured value, and then execute auto
tuning again.
• Set the sampling time to a value larger than
the output change cycle, or set a larger value
for the input filter constant. After changing
the setting, execute auto tuning again.
• Verify that the target setting contents are
correct.
• Verify that the target setting contents are
correct.
• Ensure that devices occupied by PID
instruction are not overwritten in the
program.
• Increase the difference (ULV - LLV) between
the upper limit and lower limit of the output
value for auto tuning, set a smaller value to
the input filter constant (α), or set a smaller
value to the PV threshold (SHPV) for auto
tuning, and then check the result for
improvement.
• Multiply the measured value (PV) by "10" so
that the variation of the measured value will
increase during auto tuning. The operation is
continued with KP = 32767.
• Increase the difference (ULV - LLV) between
the upper limit and lower limit of the output
value for auto tuning, set a smaller value to
the input filter constant (α), or set a smaller
value to the PV threshold (SHPV) for auto
tuning, and then check the result for
improvement. The operation is continued
with KP = 32767.
• Increase the difference (ULV - LLV) between
the upper limit and lower limit of the output
value for auto tuning, set a smaller value to
the input filter constant (α), or set a smaller
value to the PV threshold (SHPV) for auto
tuning, and then check the result for
improvement. The operation is continued
with KP = 32767.
• Modify the program so that no instruction
whose use is disabled by the interrupt
routine program is used.
Detailed Diagnostic
information timing
Error location At instruction
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Error location At instruction
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Error location At instruction
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APPENDIX
331
Appendix 3 Error Code
A