Mitsubishi Electric MELSEC Q Series, User Manual

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Chapter 16 Troubleshooting
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
I/F
errors
803 PLC CPU error The CPU module resulted in an error.
At start : The system does not
operate.
During operation : The system stops with the
setting (deceleration
stop/rapid stop) of the
detailed parameter 2 rapid
stop selection
(stop group 2).
(Note that the deceleration
stop only occurs during the
manual pulse generator
operation.)
805
Flash ROM write
number error
Data is written to the flash ROM
continuously 25 times or more from the
program.
At start: The system does not operate.
Parameter
setting range
errors
900
Outside unit setting
range The set value of the basic parameter 1
"Unit setting" is outside the setting range.
The READY signal [X0] is not turned ON.
901
Outside pulse number
per rotation range
The set value of the basic parameter 1
"Number of pulses per rotation" is outside
the setting range.
902
Outside movement
amount per rotation
range The set value of the basic parameter 1
"Movement amount per rotation" is outside
the setting range.
903
Outside unit
magnification range
• The set value of the basic parameter 1
"Unit magnification" is outside the setting
range.
• "Movement amount per rotation (AL)" ×
"Unit magnification (AM)" exceeds
2147483648.
906
Outside bias speed
range
• The set value of the basic parameter 1
"Bias speed at start" is outside the setting
range.
• The bias speed exceeds the speed limit.
The READY signal [X0] is not turned ON.
907
Outside electronic gear
setting range The set value of the electronic gear is
outside the setting range.