Mitsubishi Electric MELSEQ FX3S Series User Manual page 145

FX Series Programmable Controllers
3S
User's Manual - Hardware Edition
PLC
Error operation
code at error
occurrence
Operation error [M8067 (D8067)]
<Limit cycle method>
6757 Auto tuning result exceeds proportional gain. (K
range from 0 to 32767)
<Limit cycle method>
6758 Auto tuning result exceeds integral time.
(T = outside range from 0 to 32767)
I
<Limit cycle method>
6759 Auto tuning result exceeds derivative time.
(T = outside range from 0 to 32767)
D
6760 ABS data read from servo sum check error
Port specified by inverter communication instruction is already
Continues
6762
used in another communication.
operation
Input (X) specified by DSZR or ZRN instruction is already
6763
used in another instruction.
Pulse output number is already used in a positioning
6764
instruction or pulse output instruction (PLSY, PWM, etc.).
6770 Memory access error
6772 EEPROM memory cassette is protected against writing.
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
Special parameter error [M8489 (D8489)]
8101 Special parameter setting time-out error
8102 Special parameter setting error
Continues
operation
8103 Special parameter transfer target unconnected error
8104 Special parameter unsupported function
14 Test Operation, Adjustment, Maintenance and Troubleshooting
14.6 Judgment by Error Codes and Representation of Error Codes
Contents of error
= outside
P
Action
<Auto tuning is finished (K = 32767). → PID operation is
P
started.>
The variation of the measured value (PV) is small compared
with the output value. Multiply the measured value (PV) by
"10" so that the variation of the measured value will increase
during auto tuning.
= 32767). → PID operation is
<Auto tuning is finished (K
P
started.>
The auto tuning time is longer than necessary.
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 (SH
PV
check the result for improvement.
Check servo wiring and parameter setting. Also check ABS
instruction.
Check to make sure the port is not specified by another
instruction.
Check to make sure the input (X), as specified by DSZR or
ZRN instruction, is not being used for the following purposes:
- Input interrupt
- High-speed counter C235 to C255
- Pulse catch M8170 to M8175
- SPD instruction
Check to make sure the pulse output destination is not being
driven by another positioning instruction.
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.
The write-protect switch of the EEPROM memory cassette
was set to ON when data was transferred to the EEPROM
memory.
Confirm the cable connection between programming device
and the PLC. This error may occur when a cable is
disconnected and 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.
Turn OFF the power, and check the power supply and
connection of special adapters.
Special parameters are set improperly.
• Confirm troubleshooting for special adapters and set
special parameters correctly.
• Set special parameters correctly, turn OFF the power, and
then turn ON the power.
Special parameters are set, but special adapters/special
blocks are not connected.
Check whether special adapters is connected.
Check that special parameters with unsupported settings are
not set for connected special adapters.
11
12
13
) for auto tuning, and then
14
15
16
17
139
A
B
C