Mitsubishi Electric MELSEC-Q Structured Programming Manual page 253

FXCPU Structured Programming Manual
[Device & Common]
PLC
Error operation
code at error
occurrence
Operation error [M8067(D8067)]
<Limit cycle method>
6758 The auto tuning result exceeds the integral time.
(T = Outside the range from 0 to 32767)
I
<Limit cycle method>
6759 The auto tuning result exceeds the derivative time.
(T = Outside the range from 0 to 32767)
D
6760 Sum check error in the ABS data sent from the servo Check the connection to the servo and parameter setting.
The port specified by an inverter communication
6762
instruction is already used in another communication.
1) The input (X) specified in the DSZR, DVIT or
ZRN instruction is already used in another
6763 communication.
2) The interrupt signal device in the DVIT instruction
is outside the allowable setting range.
Continues
operation
The pulse output number is already used in a
6764 positioning instruction or pulse instruction (PLSY,
PWM, etc.).
Tue number of times of using applied instructions
6765
exceeds the limit.
6770 Memory access error
6771 The memory cassette is not connected.
6772 Data write error to the memory cassette
Access error to the memory cassette in the RUN
6773
mode
USB communication error [M8487 (D8487)]
8702 Communication character error
8703 Communication data sum check error
8704 Data format error
8705 Command error
Continues
operation
8730 Memory access error
Contents of error
5.1 FX3S/FX3G/FX3GC/FX3U/FX3UC PLCs
Action
<The PLC finishes auto tuning (K
P
operation.>
The auto tuning time is longer than necessary.
Increase the difference (ULV - LLV) between the upper limit and the
lower limit of the output value for auto tuning, set the input filter
constant (α) to a smaller value, or set the PV threshold (SH
auto tuning to a smaller value, and then check whether the situation
is improved.
Confirm that the port is not specified by another instruction.
1) Confirm that the input (X) specified in the DSZR, DVIT or ZRN
instruction is not used for the following purposes:
- Input interrupt (including the delay function)
- High speed counter C235 to C255
- Pulse catch relay M8170 to M8177
- SPD instruction
2) Check the contents of D8336 (interrupt signal specification) for
the DVIT instruction.
Confirm that the pulse output destination is not driven by another
positioning instruction.
Confirm that the number of times an applied instruction is used in the
program does not exceed the limit.
When the memory cassette is used, check whether it is mounted
correctly.
If the problem persists or if the memory cassette is not used,
something may be malfunctioning inside the PLC.
Consult your local Mitsubishi Electric representative.
Confirm that the memory cassette is attached correctly.
The write-protect switch of the memory cassette was set to ON when
data was transferred to the flash memory. Set the protect switch to
OFF.
While data was written in the RUN mode, data was transferred to
(read from or written to) the memory cassette.
Confirm the cable connection between the programming device and
the PLC. This error may occur when a cable is disconnected an
reconnected during PLC monitoring.
When the memory cassette is used, check whether it is mounted
correctly.
If the problem persists or if the memory cassette is not used,
something may be malfunctioning inside the PLC.
Consult your local Mitsubishi Electric representative.
5 Errors
= 32767), and starts PID
) for
PV
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